Branch data Line data Source code
1 : : /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2 : :
3 : : Module: FGTurbine.cpp
4 : : Author: David Culp
5 : : Date started: 03/11/2003
6 : : Purpose: This module models a turbine engine.
7 : :
8 : : ------------- Copyright (C) 2003 David Culp (davidculp2@comcast.net) ---------
9 : :
10 : : This program is free software; you can redistribute it and/or modify it under
11 : : the terms of the GNU Lesser General Public License as published by the Free Software
12 : : Foundation; either version 2 of the License, or (at your option) any later
13 : : version.
14 : :
15 : : This program is distributed in the hope that it will be useful, but WITHOUT
16 : : ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 : : FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
18 : : details.
19 : :
20 : : You should have received a copy of the GNU Lesser General Public License along with
21 : : this program; if not, write to the Free Software Foundation, Inc., 59 Temple
22 : : Place - Suite 330, Boston, MA 02111-1307, USA.
23 : :
24 : : Further information about the GNU Lesser General Public License can also be found on
25 : : the world wide web at http://www.gnu.org.
26 : :
27 : : FUNCTIONAL DESCRIPTION
28 : : --------------------------------------------------------------------------------
29 : :
30 : : This class descends from the FGEngine class and models a turbine engine based
31 : : on parameters given in the engine config file for this class
32 : :
33 : : HISTORY
34 : : --------------------------------------------------------------------------------
35 : : 03/11/2003 DPC Created
36 : : 09/08/2003 DPC Changed Calculate() and added engine phases
37 : :
38 : : %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
39 : : INCLUDES
40 : : %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
41 : :
42 : : #include <iostream>
43 : : #include <sstream>
44 : : #include "FGTurbine.h"
45 : : #include "FGThruster.h"
46 : : #include "models/FGPropulsion.h"
47 : : #include "models/FGAuxiliary.h"
48 : : #include "models/FGAtmosphere.h"
49 : :
50 : : using namespace std;
51 : :
52 : : namespace JSBSim {
53 : :
54 : : static const char *IdSrc = "$Id: FGTurbine.cpp,v 1.28 2010/08/21 17:13:48 jberndt Exp $";
55 : : static const char *IdHdr = ID_TURBINE;
56 : :
57 : : /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
58 : : CLASS IMPLEMENTATION
59 : : %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
60 : :
61 : :
62 : 0 : FGTurbine::FGTurbine(FGFDMExec* exec, Element *el, int engine_number)
63 : 0 : : FGEngine(exec, el, engine_number)
64 : : {
65 : 0 : Type = etTurbine;
66 : :
67 : 0 : MilThrust = MaxThrust = 10000.0;
68 : 0 : TSFC = 0.8;
69 : 0 : ATSFC = 1.7;
70 : 0 : IdleN1 = 30.0;
71 : 0 : IdleN2 = 60.0;
72 : 0 : MaxN1 = MaxN2 = 100.0;
73 : 0 : Augmented = AugMethod = Injected = 0;
74 : 0 : BypassRatio = BleedDemand = 0.0;
75 : 0 : IdleThrustLookup = MilThrustLookup = MaxThrustLookup = InjectionLookup = 0;
76 : 0 : N1_spinup = 1.0; N2_spinup = 3.0;
77 : :
78 : 0 : ResetToIC();
79 : :
80 : 0 : Load(exec, el);
81 : 0 : Debug(0);
82 : 0 : }
83 : :
84 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
85 : :
86 : 0 : FGTurbine::~FGTurbine()
87 : : {
88 [ # # ][ # # ]: 0 : delete IdleThrustLookup;
[ # # ]
89 [ # # ][ # # ]: 0 : delete MilThrustLookup;
[ # # ]
90 [ # # ][ # # ]: 0 : delete MaxThrustLookup;
[ # # ]
91 [ # # ][ # # ]: 0 : delete InjectionLookup;
[ # # ]
92 : 0 : Debug(1);
93 [ # # ][ # # ]: 0 : }
[ # # ]
94 : :
95 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
96 : :
97 : 0 : void FGTurbine::ResetToIC(void)
98 : : {
99 : 0 : N1 = N2 = 0.0;
100 : 0 : N2norm = 0.0;
101 : 0 : correctedTSFC = TSFC;
102 : 0 : ThrottlePos = AugmentCmd = 0.0;
103 : 0 : InletPosition = NozzlePosition = 1.0;
104 : 0 : Stalled = Seized = Overtemp = Fire = Augmentation = Injection = Reversed = false;
105 : 0 : Cutoff = true;
106 : 0 : phase = tpOff;
107 : 0 : TAT = (Auxiliary->GetTotalTemperature() - 491.69) * 0.5555556;
108 : 0 : EGT_degC = TAT;
109 : 0 : OilTemp_degK = TAT + 273.0;
110 : 0 : }
111 : :
112 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
113 : : // The main purpose of Calculate() is to determine what phase the engine should
114 : : // be in, then call the corresponding function.
115 : :
116 : 0 : void FGTurbine::Calculate(void)
117 : : {
118 : : double thrust;
119 : :
120 : 0 : RunPreFunctions();
121 : :
122 : 0 : TAT = (Auxiliary->GetTotalTemperature() - 491.69) * 0.5555556;
123 : 0 : double qbar = Auxiliary->Getqbar();
124 : 0 : dt = FDMExec->GetDeltaT() * Propulsion->GetRate();
125 : 0 : ThrottlePos = FCS->GetThrottlePos(EngineNumber);
126 [ # # ]: 0 : if (ThrottlePos > 1.0) {
127 : 0 : AugmentCmd = ThrottlePos - 1.0;
128 : 0 : ThrottlePos -= AugmentCmd;
129 : : } else {
130 : 0 : AugmentCmd = 0.0;
131 : : }
132 : :
133 : : // When trimming is finished check if user wants engine OFF or RUNNING
134 [ # # ][ # # ]: 0 : if ((phase == tpTrim) && (dt > 0)) {
135 [ # # ][ # # ]: 0 : if (Running && !Starved) {
136 : 0 : phase = tpRun;
137 : 0 : N2 = IdleN2 + ThrottlePos * N2_factor;
138 : 0 : N1 = IdleN1 + ThrottlePos * N1_factor;
139 : 0 : OilTemp_degK = 366.0;
140 : 0 : Cutoff = false;
141 : : }
142 : : else {
143 : 0 : phase = tpOff;
144 : 0 : Cutoff = true;
145 : 0 : EGT_degC = TAT;
146 : : }
147 : : }
148 : :
149 [ # # ][ # # ]: 0 : if (!Running && Cutoff && Starter) {
[ # # ]
150 [ # # ]: 0 : if (phase == tpOff) phase = tpSpinUp;
151 : : }
152 : :
153 : : // start
154 [ # # ][ # # ]: 0 : if ((Starter == true) || (qbar > 30.0)) {
155 [ # # ][ # # ]: 0 : if (!Running && !Cutoff && (N2 > 15.0)) phase = tpStart;
[ # # ]
156 : : }
157 : :
158 [ # # ][ # # ]: 0 : if (Cutoff && (phase != tpSpinUp)) phase = tpOff;
159 [ # # ]: 0 : if (dt == 0) phase = tpTrim;
160 [ # # ]: 0 : if (Starved) phase = tpOff;
161 [ # # ]: 0 : if (Stalled) phase = tpStall;
162 [ # # ]: 0 : if (Seized) phase = tpSeize;
163 : :
164 [ # # # # : 0 : switch (phase) {
# # # # ]
165 : 0 : case tpOff: thrust = Off(); break;
166 : 0 : case tpRun: thrust = Run(); break;
167 : 0 : case tpSpinUp: thrust = SpinUp(); break;
168 : 0 : case tpStart: thrust = Start(); break;
169 : 0 : case tpStall: thrust = Stall(); break;
170 : 0 : case tpSeize: thrust = Seize(); break;
171 : 0 : case tpTrim: thrust = Trim(); break;
172 : 0 : default: thrust = Off();
173 : : }
174 : :
175 : 0 : Thruster->Calculate(thrust); // allow thruster to modify thrust (i.e. reversing)
176 : :
177 : 0 : RunPostFunctions();
178 : 0 : }
179 : :
180 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
181 : :
182 : 0 : double FGTurbine::Off(void)
183 : : {
184 : 0 : double qbar = Auxiliary->Getqbar();
185 : 0 : Running = false;
186 : 0 : FuelFlow_pph = Seek(&FuelFlow_pph, 0, 1000.0, 10000.0);
187 : 0 : N1 = Seek(&N1, qbar/10.0, N1/2.0, N1/2.0);
188 : 0 : N2 = Seek(&N2, qbar/15.0, N2/2.0, N2/2.0);
189 : 0 : EGT_degC = Seek(&EGT_degC, TAT, 11.7, 7.3);
190 : 0 : OilTemp_degK = Seek(&OilTemp_degK, TAT + 273.0, 0.2, 0.2);
191 : 0 : OilPressure_psi = N2 * 0.62;
192 : 0 : NozzlePosition = Seek(&NozzlePosition, 1.0, 0.8, 0.8);
193 : 0 : EPR = Seek(&EPR, 1.0, 0.2, 0.2);
194 : 0 : Augmentation = false;
195 : 0 : ConsumeFuel();
196 : 0 : return 0.0;
197 : : }
198 : :
199 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
200 : :
201 : 0 : double FGTurbine::Run()
202 : : {
203 : : double idlethrust, milthrust, thrust;
204 : : double spoolup; // acceleration in pct/sec
205 : 0 : double sigma = Atmosphere->GetDensityRatio();
206 : 0 : double T = Atmosphere->GetTemperature();
207 : :
208 : 0 : idlethrust = MilThrust * IdleThrustLookup->GetValue();
209 : 0 : milthrust = (MilThrust - idlethrust) * MilThrustLookup->GetValue();
210 : :
211 : 0 : Running = true;
212 : 0 : Starter = false;
213 : :
214 : : // adjust acceleration for N2 and atmospheric density
215 : 0 : double n = N2norm + 0.1;
216 [ # # ]: 0 : if (n > 1) n = 1;
217 : 0 : spoolup = delay / (1 + 3 * (1-n)*(1-n)*(1-n) + (1 - sigma));
218 : :
219 : 0 : N2 = Seek(&N2, IdleN2 + ThrottlePos * N2_factor, spoolup, spoolup * 3.0);
220 : 0 : N1 = Seek(&N1, IdleN1 + ThrottlePos * N1_factor, spoolup, spoolup * 2.4);
221 : 0 : N2norm = (N2 - IdleN2) / N2_factor;
222 : 0 : thrust = idlethrust + (milthrust * N2norm * N2norm);
223 : 0 : EGT_degC = TAT + 363.1 + ThrottlePos * 357.1;
224 : 0 : OilPressure_psi = N2 * 0.62;
225 : 0 : OilTemp_degK = Seek(&OilTemp_degK, 366.0, 1.2, 0.1);
226 : :
227 [ # # ]: 0 : if (!Augmentation) {
228 : 0 : correctedTSFC = TSFC * sqrt(T/389.7) * (0.84 + (1-N2norm)*(1-N2norm));
229 : 0 : FuelFlow_pph = Seek(&FuelFlow_pph, thrust * correctedTSFC, 1000.0, 10000.0);
230 [ # # ]: 0 : if (FuelFlow_pph < IdleFF) FuelFlow_pph = IdleFF;
231 : 0 : NozzlePosition = Seek(&NozzlePosition, 1.0 - N2norm, 0.8, 0.8);
232 : 0 : thrust = thrust * (1.0 - BleedDemand);
233 : 0 : EPR = 1.0 + thrust/MilThrust;
234 : : }
235 : :
236 [ # # ]: 0 : if (AugMethod == 1) {
237 [ # # ][ # # ]: 0 : if ((ThrottlePos > 0.99) && (N2 > 97.0)) {Augmentation = true;}
238 : 0 : else {Augmentation = false;}
239 : : }
240 : :
241 [ # # ][ # # ]: 0 : if ((Augmented == 1) && Augmentation && (AugMethod < 2)) {
[ # # ]
242 : 0 : thrust = MaxThrustLookup->GetValue() * MaxThrust;
243 : 0 : FuelFlow_pph = Seek(&FuelFlow_pph, thrust * ATSFC, 5000.0, 10000.0);
244 : 0 : NozzlePosition = Seek(&NozzlePosition, 1.0, 0.8, 0.8);
245 : : }
246 : :
247 [ # # ]: 0 : if (AugMethod == 2) {
248 [ # # ]: 0 : if (AugmentCmd > 0.0) {
249 : 0 : Augmentation = true;
250 : 0 : double tdiff = (MaxThrust * MaxThrustLookup->GetValue()) - thrust;
251 : 0 : thrust += (tdiff * AugmentCmd);
252 : 0 : FuelFlow_pph = Seek(&FuelFlow_pph, thrust * ATSFC, 5000.0, 10000.0);
253 : 0 : NozzlePosition = Seek(&NozzlePosition, 1.0, 0.8, 0.8);
254 : : } else {
255 : 0 : Augmentation = false;
256 : : }
257 : : }
258 : :
259 [ # # ][ # # ]: 0 : if ((Injected == 1) && Injection) {
260 : 0 : InjectionTimer += dt;
261 [ # # ]: 0 : if (InjectionTimer < InjectionTime) {
262 : 0 : thrust = thrust * InjectionLookup->GetValue();
263 : : } else {
264 : 0 : Injection = false;
265 : : }
266 : : }
267 : :
268 : 0 : ConsumeFuel();
269 [ # # ]: 0 : if (Cutoff) phase = tpOff;
270 [ # # ]: 0 : if (Starved) phase = tpOff;
271 : :
272 : 0 : return thrust;
273 : : }
274 : :
275 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
276 : :
277 : 0 : double FGTurbine::SpinUp(void)
278 : : {
279 : 0 : Running = false;
280 : 0 : FuelFlow_pph = 0.0;
281 : 0 : N2 = Seek(&N2, 25.18, N2_spinup, N2/2.0);
282 : 0 : N1 = Seek(&N1, 5.21, N1_spinup, N1/2.0);
283 : 0 : EGT_degC = Seek(&EGT_degC, TAT, 11.7, 7.3);
284 : 0 : OilPressure_psi = N2 * 0.62;
285 : 0 : OilTemp_degK = Seek(&OilTemp_degK, TAT + 273.0, 0.2, 0.2);
286 : 0 : EPR = 1.0;
287 : 0 : NozzlePosition = 1.0;
288 [ # # ]: 0 : if (Starter == false) phase = tpOff;
289 : 0 : return 0.0;
290 : : }
291 : :
292 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
293 : :
294 : 0 : double FGTurbine::Start(void)
295 : : {
296 : 0 : double qbar = Auxiliary->Getqbar();
297 [ # # ][ # # ]: 0 : if ((N2 > 15.0) && !Starved) { // minimum 15% N2 needed for start
298 : 0 : Cranking = true; // provided for sound effects signal
299 [ # # ]: 0 : if (N2 < IdleN2) {
300 : 0 : N2 = Seek(&N2, IdleN2, 2.0, N2/2.0);
301 : 0 : N1 = Seek(&N1, IdleN1, 1.4, N1/2.0);
302 : 0 : EGT_degC = Seek(&EGT_degC, TAT + 363.1, 21.3, 7.3);
303 : 0 : FuelFlow_pph = IdleFF * N2 / IdleN2;
304 : 0 : OilPressure_psi = N2 * 0.62;
305 : 0 : ConsumeFuel();
306 [ # # ][ # # ]: 0 : if ((Starter == false) && (qbar < 30.0)) phase = tpOff; // aborted start
307 : : }
308 : : else {
309 : 0 : phase = tpRun;
310 : 0 : Running = true;
311 : 0 : Starter = false;
312 : 0 : Cranking = false;
313 : : }
314 : : }
315 : : else { // no start if N2 < 15%
316 : 0 : phase = tpOff;
317 : 0 : Starter = false;
318 : : }
319 : :
320 : 0 : return 0.0;
321 : : }
322 : :
323 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
324 : :
325 : 0 : double FGTurbine::Stall(void)
326 : : {
327 : 0 : double qbar = Auxiliary->Getqbar();
328 : 0 : EGT_degC = TAT + 903.14;
329 : 0 : FuelFlow_pph = IdleFF;
330 : 0 : N1 = Seek(&N1, qbar/10.0, 0, N1/10.0);
331 : 0 : N2 = Seek(&N2, qbar/15.0, 0, N2/10.0);
332 : 0 : ConsumeFuel();
333 [ # # ]: 0 : if (ThrottlePos < 0.01) {
334 : 0 : phase = tpRun; // clear the stall with throttle to idle
335 : 0 : Stalled = false;
336 : : }
337 : 0 : return 0.0;
338 : : }
339 : :
340 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
341 : :
342 : 0 : double FGTurbine::Seize(void)
343 : : {
344 : 0 : double qbar = Auxiliary->Getqbar();
345 : 0 : N2 = 0.0;
346 : 0 : N1 = Seek(&N1, qbar/20.0, 0, N1/15.0);
347 [ # # ]: 0 : FuelFlow_pph = Cutoff ? 0.0 : IdleFF;
348 : 0 : ConsumeFuel();
349 : 0 : OilPressure_psi = 0.0;
350 : 0 : OilTemp_degK = Seek(&OilTemp_degK, TAT + 273.0, 0, 0.2);
351 : 0 : Running = false;
352 : 0 : return 0.0;
353 : : }
354 : :
355 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
356 : :
357 : 0 : double FGTurbine::Trim()
358 : : {
359 : : double idlethrust, milthrust, thrust, tdiff;
360 : 0 : idlethrust = MilThrust * IdleThrustLookup->GetValue();
361 : 0 : milthrust = (MilThrust - idlethrust) * MilThrustLookup->GetValue();
362 : 0 : N2 = IdleN2 + ThrottlePos * N2_factor;
363 : 0 : N2norm = (N2 - IdleN2) / N2_factor;
364 : : thrust = (idlethrust + (milthrust * N2norm * N2norm))
365 : 0 : * (1.0 - BleedDemand);
366 : :
367 [ # # ]: 0 : if (AugMethod == 1) {
368 [ # # ][ # # ]: 0 : if ((ThrottlePos > 0.99) && (N2 > 97.0)) {Augmentation = true;}
369 : 0 : else {Augmentation = false;}
370 : : }
371 : :
372 [ # # ][ # # ]: 0 : if ((Augmented == 1) && Augmentation && (AugMethod < 2)) {
[ # # ]
373 : 0 : thrust = MaxThrust * MaxThrustLookup->GetValue();
374 : : }
375 : :
376 [ # # ]: 0 : if (AugMethod == 2) {
377 [ # # ]: 0 : if (AugmentCmd > 0.0) {
378 : 0 : tdiff = (MaxThrust * MaxThrustLookup->GetValue()) - thrust;
379 : 0 : thrust += (tdiff * AugmentCmd);
380 : : }
381 : : }
382 : :
383 [ # # ][ # # ]: 0 : if ((Injected == 1) && Injection) {
384 : 0 : thrust = thrust * InjectionLookup->GetValue();
385 : : }
386 : :
387 : 0 : return thrust;
388 : : }
389 : :
390 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
391 : :
392 : 0 : double FGTurbine::CalcFuelNeed(void)
393 : : {
394 : 0 : double dT = FDMExec->GetDeltaT() * Propulsion->GetRate();
395 : 0 : FuelFlowRate = FuelFlow_pph / 3600.0; // Calculates flow in lbs/sec from lbs/hr
396 : 0 : FuelExpended = FuelFlowRate * dT; // Calculates fuel expended in this time step
397 : 0 : return FuelExpended;
398 : : }
399 : :
400 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
401 : :
402 : 0 : double FGTurbine::GetPowerAvailable(void) {
403 [ # # ]: 0 : if( ThrottlePos <= 0.77 )
404 : 0 : return 64.94*ThrottlePos;
405 : : else
406 : 0 : return 217.38*ThrottlePos - 117.38;
407 : : }
408 : :
409 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
410 : :
411 : 0 : double FGTurbine::Seek(double *var, double target, double accel, double decel) {
412 : 0 : double v = *var;
413 [ # # ][ # # ]: 0 : if (v > target) {
[ # # ][ # # ]
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414 : 0 : v -= dt * decel;
415 [ # # ][ # # ]: 0 : if (v < target) v = target;
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416 [ # # ][ # # ]: 0 : } else if (v < target) {
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417 : 0 : v += dt * accel;
418 [ # # ][ # # ]: 0 : if (v > target) v = target;
[ # # ][ # # ]
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419 : : }
420 : 0 : return v;
421 : : }
422 : :
423 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
424 : :
425 : 0 : bool FGTurbine::Load(FGFDMExec* exec, Element *el)
426 : : {
427 : 0 : string property_name, property_prefix;
428 : 0 : property_prefix = CreateIndexedPropertyName("propulsion/engine", EngineNumber);
429 : :
430 [ # # ]: 0 : if (el->FindElement("milthrust"))
431 : 0 : MilThrust = el->FindElementValueAsNumberConvertTo("milthrust","LBS");
432 [ # # ]: 0 : if (el->FindElement("maxthrust"))
433 : 0 : MaxThrust = el->FindElementValueAsNumberConvertTo("maxthrust","LBS");
434 [ # # ]: 0 : if (el->FindElement("bypassratio"))
435 : 0 : BypassRatio = el->FindElementValueAsNumber("bypassratio");
436 [ # # ]: 0 : if (el->FindElement("bleed"))
437 : 0 : BleedDemand = el->FindElementValueAsNumber("bleed");
438 [ # # ]: 0 : if (el->FindElement("tsfc"))
439 : 0 : TSFC = el->FindElementValueAsNumber("tsfc");
440 [ # # ]: 0 : if (el->FindElement("atsfc"))
441 : 0 : ATSFC = el->FindElementValueAsNumber("atsfc");
442 [ # # ]: 0 : if (el->FindElement("idlen1"))
443 : 0 : IdleN1 = el->FindElementValueAsNumber("idlen1");
444 [ # # ]: 0 : if (el->FindElement("idlen2"))
445 : 0 : IdleN2 = el->FindElementValueAsNumber("idlen2");
446 [ # # ]: 0 : if (el->FindElement("maxn1"))
447 : 0 : MaxN1 = el->FindElementValueAsNumber("maxn1");
448 [ # # ]: 0 : if (el->FindElement("maxn2"))
449 : 0 : MaxN2 = el->FindElementValueAsNumber("maxn2");
450 [ # # ]: 0 : if (el->FindElement("n1spinup"))
451 : 0 : N1_spinup = el->FindElementValueAsNumber("n1spinup");
452 [ # # ]: 0 : if (el->FindElement("n2spinup"))
453 : 0 : N2_spinup = el->FindElementValueAsNumber("n2spinup");
454 [ # # ]: 0 : if (el->FindElement("augmented"))
455 : 0 : Augmented = (int)el->FindElementValueAsNumber("augmented");
456 [ # # ]: 0 : if (el->FindElement("augmethod"))
457 : 0 : AugMethod = (int)el->FindElementValueAsNumber("augmethod");
458 [ # # ]: 0 : if (el->FindElement("injected"))
459 : 0 : Injected = (int)el->FindElementValueAsNumber("injected");
460 [ # # ]: 0 : if (el->FindElement("injection-time"))
461 : 0 : InjectionTime = el->FindElementValueAsNumber("injection-time");
462 : :
463 : : Element *function_element;
464 : 0 : string name;
465 : 0 : FGPropertyManager* PropertyManager = exec->GetPropertyManager();
466 : :
467 : : while (true) {
468 : 0 : function_element = el->FindNextElement("function");
469 [ # # ]: 0 : if (!function_element) break;
470 : 0 : name = function_element->GetAttributeValue("name");
471 [ # # ]: 0 : if (name == "IdleThrust") {
472 : 0 : IdleThrustLookup = new FGFunction(PropertyManager, function_element, property_prefix);
473 [ # # ]: 0 : } else if (name == "MilThrust") {
474 : 0 : MilThrustLookup = new FGFunction(PropertyManager, function_element, property_prefix);
475 [ # # ]: 0 : } else if (name == "AugThrust") {
476 : 0 : MaxThrustLookup = new FGFunction(PropertyManager, function_element, property_prefix);
477 [ # # ]: 0 : } else if (name == "Injection") {
478 : 0 : InjectionLookup = new FGFunction(PropertyManager, function_element, property_prefix);
479 : : } else {
480 : : cerr << "Unknown function type: " << name << " in turbine definition." <<
481 : 0 : endl;
482 : : }
483 : : }
484 : :
485 : : // Pre-calculations and initializations
486 : :
487 : 0 : delay = 90.0 / (BypassRatio + 3.0);
488 : 0 : N1_factor = MaxN1 - IdleN1;
489 : 0 : N2_factor = MaxN2 - IdleN2;
490 : 0 : OilTemp_degK = (Auxiliary->GetTotalTemperature() - 491.69) * 0.5555556 + 273.0;
491 : 0 : IdleFF = pow(MilThrust, 0.2) * 107.0; // just an estimate
492 : :
493 : 0 : bindmodel();
494 : 0 : return true;
495 : : }
496 : :
497 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
498 : :
499 : 0 : string FGTurbine::GetEngineLabels(const string& delimiter)
500 : : {
501 : 0 : std::ostringstream buf;
502 : :
503 : : buf << Name << "_N1[" << EngineNumber << "]" << delimiter
504 : : << Name << "_N2[" << EngineNumber << "]" << delimiter
505 : 0 : << Thruster->GetThrusterLabels(EngineNumber, delimiter);
506 : :
507 : 0 : return buf.str();
508 : : }
509 : :
510 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
511 : :
512 : 0 : string FGTurbine::GetEngineValues(const string& delimiter)
513 : : {
514 : 0 : std::ostringstream buf;
515 : :
516 : : buf << N1 << delimiter
517 : : << N2 << delimiter
518 : 0 : << Thruster->GetThrusterValues(EngineNumber, delimiter);
519 : :
520 : 0 : return buf.str();
521 : : }
522 : :
523 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
524 : :
525 : 0 : void FGTurbine::bindmodel()
526 : : {
527 : 0 : string property_name, base_property_name;
528 : 0 : base_property_name = CreateIndexedPropertyName("propulsion/engine", EngineNumber);
529 : 0 : property_name = base_property_name + "/n1";
530 : 0 : PropertyManager->Tie( property_name.c_str(), &N1);
531 : 0 : property_name = base_property_name + "/n2";
532 : 0 : PropertyManager->Tie( property_name.c_str(), &N2);
533 : 0 : property_name = base_property_name + "/injection_cmd";
534 : : PropertyManager->Tie( property_name.c_str(), (FGTurbine*)this,
535 : 0 : &FGTurbine::GetInjection, &FGTurbine::SetInjection);
536 : 0 : property_name = base_property_name + "/seized";
537 : 0 : PropertyManager->Tie( property_name.c_str(), &Seized);
538 : 0 : property_name = base_property_name + "/stalled";
539 : 0 : PropertyManager->Tie( property_name.c_str(), &Stalled);
540 : 0 : }
541 : :
542 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
543 : :
544 : 0 : int FGTurbine::InitRunning(void) {
545 : 0 : FDMExec->SuspendIntegration();
546 : 0 : Cutoff=false;
547 : 0 : Running=true;
548 : 0 : N2=IdleN2;
549 : 0 : Calculate();
550 : 0 : FDMExec->ResumeIntegration();
551 : 0 : return phase==tpRun;
552 : : }
553 : :
554 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
555 : : // The bitmasked value choices are as follows:
556 : : // unset: In this case (the default) JSBSim would only print
557 : : // out the normally expected messages, essentially echoing
558 : : // the config files as they are read. If the environment
559 : : // variable is not set, debug_lvl is set to 1 internally
560 : : // 0: This requests JSBSim not to output any messages
561 : : // whatsoever.
562 : : // 1: This value explicity requests the normal JSBSim
563 : : // startup messages
564 : : // 2: This value asks for a message to be printed out when
565 : : // a class is instantiated
566 : : // 4: When this value is set, a message is displayed when a
567 : : // FGModel object executes its Run() method
568 : : // 8: When this value is set, various runtime state variables
569 : : // are printed out periodically
570 : : // 16: When set various parameters are sanity checked and
571 : : // a message is printed out when they go out of bounds
572 : :
573 : 0 : void FGTurbine::Debug(int from)
574 : : {
575 [ # # ]: 0 : if (debug_lvl <= 0) return;
576 : :
577 [ # # ]: 0 : if (debug_lvl & 1) { // Standard console startup message output
578 : : if (from == 0) { // Constructor
579 : :
580 : : }
581 [ # # ]: 0 : if (from == 2) { // called from Load()
582 : 0 : cout << "\n Engine Name: " << Name << endl;
583 : 0 : cout << " MilThrust: " << MilThrust << endl;
584 : 0 : cout << " MaxThrust: " << MaxThrust << endl;
585 : 0 : cout << " BypassRatio: " << BypassRatio << endl;
586 : 0 : cout << " TSFC: " << TSFC << endl;
587 : 0 : cout << " ATSFC: " << ATSFC << endl;
588 : 0 : cout << " IdleN1: " << IdleN1 << endl;
589 : 0 : cout << " IdleN2: " << IdleN2 << endl;
590 : 0 : cout << " MaxN1: " << MaxN1 << endl;
591 : 0 : cout << " MaxN2: " << MaxN2 << endl;
592 : 0 : cout << " Augmented: " << Augmented << endl;
593 : 0 : cout << " AugMethod: " << AugMethod << endl;
594 : 0 : cout << " Injected: " << Injected << endl;
595 : 0 : cout << " MinThrottle: " << MinThrottle << endl;
596 : :
597 : : cout << endl;
598 : : }
599 : : }
600 [ # # ]: 0 : if (debug_lvl & 2 ) { // Instantiation/Destruction notification
601 [ # # ]: 0 : if (from == 0) cout << "Instantiated: FGTurbine" << endl;
602 [ # # ]: 0 : if (from == 1) cout << "Destroyed: FGTurbine" << endl;
603 : : }
604 : 0 : if (debug_lvl & 4 ) { // Run() method entry print for FGModel-derived objects
605 : : }
606 : 0 : if (debug_lvl & 8 ) { // Runtime state variables
607 : : }
608 : 0 : if (debug_lvl & 16) { // Sanity checking
609 : : }
610 [ # # ]: 0 : if (debug_lvl & 64) {
611 [ # # ]: 0 : if (from == 0) { // Constructor
612 : 0 : cout << IdSrc << endl;
613 : 0 : cout << IdHdr << endl;
614 : : }
615 : : }
616 : : }
617 [ + + ][ + - ]: 12 : }
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