159 lines
4.9 KiB
C++
159 lines
4.9 KiB
C++
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Header: FGPiston.h
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Author: Jon S. Berndt
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Date started: 09/12/2000
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------------- Copyright (C) 2000 Jon S. Berndt (jsb@hal-pc.org) --------------
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place - Suite 330, Boston, MA 02111-1307, USA.
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Further information about the GNU General Public License can also be found on
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the world wide web at http://www.gnu.org.
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HISTORY
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--------------------------------------------------------------------------------
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09/12/2000 JSB Created
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10/01/2001 DPM Modified to use equations from Dave Luff's piston model.
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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COMMENTS, REFERENCES, and NOTES
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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SENTRY
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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#ifndef FGPISTON_H
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#define FGPISTON_H
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/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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INCLUDES
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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#include "FGEngine.h"
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#include "FGConfigFile.h"
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/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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DEFINITIONS
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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#define ID_PISTON "$Id$";
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/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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FORWARD DECLARATIONS
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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COMMENTS, REFERENCES, and NOTES
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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DOCUMENTATION
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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/** Models Dave Luff's engine model as ported into JSBSim by David Megginson.
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@author Jon S. Berndt (Engine framework code and framework-related mods)
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@author Dave Luff (engine operational code)
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@author David Megginson (porting and additional code)
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@version $Id$
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*/
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/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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CLASS DECLARATION
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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class FGPiston : public FGEngine
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{
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public:
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/// Constructor
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FGPiston(FGFDMExec* exec, FGConfigFile* Eng_cfg);
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/// Destructor
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~FGPiston();
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float Calculate(float PowerRequired);
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float GetPowerAvailable(void) {return PowerAvailable;}
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private:
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float BrakeHorsePower;
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float SpeedSlope;
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float SpeedIntercept;
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float AltitudeSlope;
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float PowerAvailable;
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// timestep
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float dt;
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// engine state
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bool running;
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bool cranking;
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void doEngineStartup(void);
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void doManifoldPressure(void);
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void doAirFlow(void);
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void doFuelFlow(void);
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void doEnginePower(void);
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void doEGT(void);
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void doCHT(void);
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void doOilPressure(void);
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void doOilTemperature(void);
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//
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// constants
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//
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const float CONVERT_CUBIC_INCHES_TO_METERS_CUBED;
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const float R_air;
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const float rho_fuel; // kg/m^3
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const float calorific_value_fuel; // W/Kg (approximate)
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const float Cp_air; // J/KgK
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const float Cp_fuel; // J/KgK
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//
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// Configuration
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//
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float MinManifoldPressure_inHg; // Inches Hg
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float MaxManifoldPressure_inHg; // Inches Hg
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float Displacement; // cubic inches
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float MaxHP; // horsepower
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float Cycles; // cycles/power stroke
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float IdleRPM; // revolutions per minute
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//
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// Inputs (in addition to those in FGEngine).
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//
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float p_amb; // Pascals
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float p_amb_sea_level; // Pascals
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float T_amb; // degrees Kelvin
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float RPM; // revolutions per minute
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float IAS; // knots
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//
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// Outputs (in addition to those in FGEngine).
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//
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float rho_air;
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float volumetric_efficiency;
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float m_dot_air;
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float equivalence_ratio;
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float m_dot_fuel;
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float Percentage_Power;
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float HP;
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float combustion_efficiency;
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void Debug(void);
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};
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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#endif
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