Helmholtz testing (no decay bug)
This commit is contained in:
@@ -13,144 +13,103 @@ namespace FluidSim.Components
|
||||
private readonly Port[] _ports;
|
||||
IReadOnlyList<Port> IComponent.Ports => _ports;
|
||||
|
||||
// Geometry
|
||||
public double Bore { get; }
|
||||
public double Stroke { get; }
|
||||
public double ConRodLength { get; }
|
||||
public double CompressionRatio { get; }
|
||||
public float Bore { get; }
|
||||
public float Stroke { get; }
|
||||
public float ConRodLength { get; }
|
||||
public float CompressionRatio { get; }
|
||||
|
||||
// Valve timings (degrees, 0 = TDC compression, 720° full cycle)
|
||||
public double IVO { get; }
|
||||
public double IVC { get; }
|
||||
public double EVO { get; }
|
||||
public double EVC { get; }
|
||||
public float IVO, IVC, EVO, EVC; // degrees
|
||||
public float IntakeValveDiameter = 0.03f;
|
||||
public float ExhaustValveDiameter = 0.028f;
|
||||
public float IntakeValveLift = 0.005f;
|
||||
public float ExhaustValveLift = 0.005f;
|
||||
|
||||
// Valve geometry
|
||||
public double IntakeValveDiameter { get; set; } = 0.030;
|
||||
public double ExhaustValveDiameter { get; set; } = 0.028;
|
||||
public double IntakeValveLift { get; set; } = 0.005;
|
||||
public double ExhaustValveLift { get; set; } = 0.005;
|
||||
public float IntakeValveMaxArea => MathF.PI * IntakeValveDiameter * IntakeValveLift;
|
||||
public float ExhaustValveMaxArea => MathF.PI * ExhaustValveDiameter * ExhaustValveLift;
|
||||
|
||||
public double IntakeValveMaxArea => Math.PI * IntakeValveDiameter * IntakeValveLift;
|
||||
public double ExhaustValveMaxArea => Math.PI * ExhaustValveDiameter * ExhaustValveLift;
|
||||
public float SparkAdvance = 20f;
|
||||
public float WiebeA = 5f, WiebeM = 2f, WiebeDuration = 60f, WiebeStart = 5f;
|
||||
public float StoichiometricAFR = 14.7f;
|
||||
public float FuelLowerHeatingValue = 44e6f;
|
||||
public float EnergyVariationFraction = 0.05f;
|
||||
public float MisfireProbability = 0.01f;
|
||||
public float CylinderWallArea = 0.02f;
|
||||
public float HeatTransferCoefficient = 100f;
|
||||
public float AmbientTemperature = 300f;
|
||||
|
||||
// Ignition and combustion
|
||||
public double SparkAdvance { get; set; } = 20.0;
|
||||
public double WiebeA { get; set; } = 5.0;
|
||||
public double WiebeM { get; set; } = 2.0;
|
||||
public double WiebeDuration { get; set; } = 60.0;
|
||||
public double WiebeStart { get; set; } = 5.0;
|
||||
public float PhaseOffset; // rad
|
||||
|
||||
// Fuel
|
||||
public double StoichiometricAFR { get; set; } = 14.7;
|
||||
public double FuelLowerHeatingValue { get; set; } = 44e6;
|
||||
public float Volume => cylinderVolume;
|
||||
public float Pressure => (Gamma - 1f) * cylinderEnergy / MathF.Max(cylinderVolume, 1e-12f);
|
||||
public float Temperature => Pressure / MathF.Max(Density * GasConstant, 1e-12f);
|
||||
public float Density => Mass / MathF.Max(cylinderVolume, 1e-12f);
|
||||
public float Mass => _airMass + _exhaustMass;
|
||||
public float AirFraction => _airMass / MathF.Max(Mass, 1e-12f);
|
||||
public float PistonFraction => (cylinderVolume - clearanceVolume) / SweptVolume;
|
||||
|
||||
// Cycle‑to‑cycle randomness
|
||||
public double EnergyVariationFraction { get; set; } = 0.05;
|
||||
public double MisfireProbability { get; set; } = 0.01;
|
||||
|
||||
// Heat loss
|
||||
public double CylinderWallArea { get; set; } = 0.02;
|
||||
public double HeatTransferCoefficient { get; set; } = 100.0;
|
||||
public double AmbientTemperature { get; set; } = 300.0;
|
||||
|
||||
// ---- Multi‑cylinder support ----
|
||||
/// <summary>
|
||||
/// Phase offset (radians) added to the crankshaft angle for this cylinder.
|
||||
/// Used for multi‑cylinder engines; set to 0 for single‑cylinder.
|
||||
/// </summary>
|
||||
public double PhaseOffset { get; set; } = 0.0;
|
||||
|
||||
// State (public for drawing)
|
||||
public double Volume => cylinderVolume;
|
||||
public double Pressure => (Gamma - 1.0) * cylinderEnergy / Math.Max(cylinderVolume, 1e-12);
|
||||
public double Temperature => Pressure / Math.Max(Density * GasConstant, 1e-12);
|
||||
public double Density => Mass / Math.Max(cylinderVolume, 1e-12);
|
||||
public double Mass => _airMass + _exhaustMass;
|
||||
public double AirFraction => _airMass / Math.Max(Mass, 1e-12);
|
||||
public double PistonFraction => (cylinderVolume - clearanceVolume) / SweptVolume;
|
||||
|
||||
private double cylinderVolume;
|
||||
private double cylinderEnergy;
|
||||
private double _airMass;
|
||||
private double _exhaustMass;
|
||||
private double trappedAirMass;
|
||||
private double fuelMass;
|
||||
private double burnFraction;
|
||||
private bool combustionActive;
|
||||
private bool fuelInjected;
|
||||
|
||||
private double _energyFactor = 1.0;
|
||||
private float cylinderVolume, cylinderEnergy;
|
||||
private float _airMass, _exhaustMass;
|
||||
private float trappedAirMass, fuelMass, burnFraction;
|
||||
private bool combustionActive, fuelInjected;
|
||||
private float _energyFactor = 1f;
|
||||
private readonly Random _random = new Random();
|
||||
|
||||
private const double Gamma = 1.4;
|
||||
private const double GasConstant = 287.0;
|
||||
private const float Gamma = 1.4f;
|
||||
private const float GasConstant = 287f;
|
||||
private const float MaxPressurePa = 200e5f;
|
||||
private const float MaxTemperatureK = 3500f;
|
||||
|
||||
private const double MaxPressurePa = 200e5;
|
||||
private const double MaxTemperatureK = 3500.0;
|
||||
|
||||
public Cylinder(double bore, double stroke, double conRodLength, double compressionRatio,
|
||||
double ivo, double ivc, double evo, double evc, Crankshaft crankshaft)
|
||||
public Cylinder(float bore, float stroke, float conRodLength, float compressionRatio,
|
||||
float ivo, float ivc, float evo, float evc, Crankshaft crankshaft)
|
||||
{
|
||||
Bore = bore;
|
||||
Stroke = stroke;
|
||||
ConRodLength = conRodLength;
|
||||
Bore = bore; Stroke = stroke; ConRodLength = conRodLength;
|
||||
CompressionRatio = compressionRatio;
|
||||
IVO = ivo;
|
||||
IVC = ivc;
|
||||
EVO = evo;
|
||||
EVC = evc;
|
||||
|
||||
IVO = ivo; IVC = ivc; EVO = evo; EVC = evc;
|
||||
Crankshaft = crankshaft ?? throw new ArgumentNullException(nameof(crankshaft));
|
||||
|
||||
cylinderVolume = clearanceVolume;
|
||||
double initRho = 1.225;
|
||||
float initRho = 1.225f;
|
||||
_airMass = initRho * clearanceVolume;
|
||||
_exhaustMass = 0.0;
|
||||
cylinderEnergy = 101325.0 * clearanceVolume / (Gamma - 1.0);
|
||||
_exhaustMass = 0f;
|
||||
cylinderEnergy = 101325f * clearanceVolume / (Gamma - 1f);
|
||||
|
||||
IntakePort = new Port { Owner = this };
|
||||
ExhaustPort = new Port { Owner = this };
|
||||
_ports = new[] { IntakePort, ExhaustPort };
|
||||
}
|
||||
|
||||
// Derived volumes
|
||||
private double SweptVolume => Math.PI * 0.25 * Bore * Bore * Stroke;
|
||||
private double clearanceVolume => SweptVolume / (CompressionRatio - 1.0);
|
||||
private double CrankRadius => Stroke / 2.0;
|
||||
private double Obliquity => CrankRadius / ConRodLength;
|
||||
private float SweptVolume => MathF.PI * 0.25f * Bore * Bore * Stroke;
|
||||
private float clearanceVolume => SweptVolume / (CompressionRatio - 1f);
|
||||
private float CrankRadius => Stroke * 0.5f;
|
||||
private float Obliquity => CrankRadius / ConRodLength;
|
||||
|
||||
// Offset-aware crank angle in degrees
|
||||
private double CrankDeg =>
|
||||
((Crankshaft.CrankAngle + PhaseOffset) % (4.0 * Math.PI)) * 180.0 / Math.PI % 720.0;
|
||||
private float CrankDeg =>
|
||||
((Crankshaft.CrankAngle + PhaseOffset) % (4f * MathF.PI)) * 180f / MathF.PI % 720f;
|
||||
|
||||
public double ComputeVolume(double thetaRad)
|
||||
public float ComputeVolume(float thetaRad)
|
||||
{
|
||||
double r = CrankRadius;
|
||||
double l = ConRodLength;
|
||||
double cosTh = Math.Cos(thetaRad);
|
||||
double sinTh = Math.Sin(thetaRad);
|
||||
double term = Math.Sqrt(1.0 - Obliquity * Obliquity * sinTh * sinTh);
|
||||
double x = r * (1.0 - cosTh) + l * (1.0 - term);
|
||||
double area = Math.PI * 0.25 * Bore * Bore;
|
||||
float r = CrankRadius, l = ConRodLength;
|
||||
float cosTh = MathF.Cos(thetaRad), sinTh = MathF.Sin(thetaRad);
|
||||
float term = MathF.Sqrt(1f - Obliquity * Obliquity * sinTh * sinTh);
|
||||
float x = r * (1f - cosTh) + l * (1f - term);
|
||||
float area = MathF.PI * 0.25f * Bore * Bore;
|
||||
return clearanceVolume + area * x;
|
||||
}
|
||||
|
||||
private double ValveLift(double thetaDeg, double opens, double closes, double peakLift)
|
||||
private float ValveLift(float thetaDeg, float opens, float closes, float peakLift)
|
||||
{
|
||||
double deg = thetaDeg % 720.0;
|
||||
if (deg < 0) deg += 720.0;
|
||||
float deg = thetaDeg % 720f;
|
||||
if (deg < 0f) deg += 720f;
|
||||
float duration = closes - opens;
|
||||
if (duration <= 0f) return 0f;
|
||||
|
||||
double duration = closes - opens;
|
||||
if (duration <= 0) return 0.0;
|
||||
|
||||
double rampDur = duration * 0.25;
|
||||
double holdDur = duration - 2.0 * rampDur;
|
||||
float rampDur = duration * 0.25f;
|
||||
float holdDur = duration - 2f * rampDur;
|
||||
|
||||
if (deg >= opens && deg < opens + rampDur)
|
||||
{
|
||||
double t = (deg - opens) / rampDur;
|
||||
return peakLift * t * t * (3.0 - 2.0 * t);
|
||||
float t = (deg - opens) / rampDur;
|
||||
return peakLift * t * t * (3f - 2f * t);
|
||||
}
|
||||
else if (deg >= opens + rampDur && deg < opens + rampDur + holdDur)
|
||||
{
|
||||
@@ -158,54 +117,45 @@ namespace FluidSim.Components
|
||||
}
|
||||
else if (deg >= opens + rampDur + holdDur && deg <= closes)
|
||||
{
|
||||
double t = (deg - (opens + rampDur + holdDur)) / rampDur;
|
||||
return peakLift * (1.0 - t) * (1.0 - t) * (1.0 + 2.0 * t);
|
||||
float t = (deg - (opens + rampDur + holdDur)) / rampDur;
|
||||
return peakLift * (1f - t) * (1f - t) * (1f + 2f * t);
|
||||
}
|
||||
return 0.0;
|
||||
return 0f;
|
||||
}
|
||||
|
||||
public double IntakeValveArea =>
|
||||
Math.PI * IntakeValveDiameter * ValveLift(CrankDeg, IVO, IVC, IntakeValveLift);
|
||||
public float IntakeValveArea =>
|
||||
MathF.PI * IntakeValveDiameter * ValveLift(CrankDeg, IVO, IVC, IntakeValveLift);
|
||||
public float ExhaustValveArea =>
|
||||
MathF.PI * ExhaustValveDiameter * ValveLift(CrankDeg, EVO, EVC, ExhaustValveLift);
|
||||
|
||||
public double ExhaustValveArea =>
|
||||
Math.PI * ExhaustValveDiameter * ValveLift(CrankDeg, EVO, EVC, ExhaustValveLift);
|
||||
|
||||
private double Wiebe(double angleSinceSpark)
|
||||
private float Wiebe(float angleSinceSpark)
|
||||
{
|
||||
if (angleSinceSpark < WiebeStart) return 0.0;
|
||||
double phi = (angleSinceSpark - WiebeStart) / WiebeDuration;
|
||||
if (phi <= 0) return 0.0;
|
||||
return 1.0 - Math.Exp(-WiebeA * Math.Pow(phi, WiebeM + 1));
|
||||
if (angleSinceSpark < WiebeStart) return 0f;
|
||||
float phi = (angleSinceSpark - WiebeStart) / WiebeDuration;
|
||||
if (phi <= 0f) return 0f;
|
||||
return 1f - MathF.Exp(-WiebeA * MathF.Pow(phi, WiebeM + 1f));
|
||||
}
|
||||
|
||||
public void PreStep(double dt)
|
||||
public void PreStep(float dt)
|
||||
{
|
||||
double prevVolume = cylinderVolume;
|
||||
|
||||
// ----- Use phase‑offset crank angle for this cylinder -----
|
||||
double crankAngleRad = Crankshaft.CrankAngle + PhaseOffset;
|
||||
float prevVolume = cylinderVolume;
|
||||
float crankAngleRad = Crankshaft.CrankAngle + PhaseOffset;
|
||||
cylinderVolume = ComputeVolume(crankAngleRad);
|
||||
|
||||
double dV = cylinderVolume - prevVolume;
|
||||
|
||||
// Piston torque
|
||||
double pRel = Pressure - 101325.0;
|
||||
double sinTh = Math.Sin(crankAngleRad);
|
||||
double cosTh = Math.Cos(crankAngleRad);
|
||||
double term = Math.Sqrt(1.0 - Obliquity * Obliquity * sinTh * sinTh);
|
||||
double dxdtheta = CrankRadius * sinTh * (1.0 + Obliquity * cosTh / term);
|
||||
double pistonArea = Math.PI * 0.25 * Bore * Bore;
|
||||
double torque = pRel * pistonArea * dxdtheta;
|
||||
Crankshaft.AddTorque(torque);
|
||||
float dV = cylinderVolume - prevVolume;
|
||||
float pRel = Pressure - 101325f;
|
||||
float sinTh = MathF.Sin(crankAngleRad), cosTh = MathF.Cos(crankAngleRad);
|
||||
float term = MathF.Sqrt(1f - Obliquity * Obliquity * sinTh * sinTh);
|
||||
float dxdtheta = CrankRadius * sinTh * (1f + Obliquity * cosTh / term);
|
||||
float pistonArea = MathF.PI * 0.25f * Bore * Bore;
|
||||
Crankshaft.AddTorque(pRel * pistonArea * dxdtheta);
|
||||
|
||||
cylinderEnergy -= Pressure * dV;
|
||||
|
||||
// Also use offset angle for event detection
|
||||
double crankshaftPrevAngle = Crankshaft.PreviousAngle;
|
||||
double prevDeg = (crankshaftPrevAngle + PhaseOffset) * 180.0 / Math.PI % 720.0;
|
||||
double currDeg = crankAngleRad * 180.0 / Math.PI % 720.0;
|
||||
float prevDeg = (Crankshaft.PreviousAngle + PhaseOffset) * 180f / MathF.PI % 720f;
|
||||
float currDeg = crankAngleRad * 180f / MathF.PI % 720f;
|
||||
|
||||
// ----- Intake closing: capture trapped air mass and compute fuel -----
|
||||
// Intake closing
|
||||
if (prevDeg >= IVO && prevDeg < IVC && currDeg >= IVC)
|
||||
{
|
||||
trappedAirMass = _airMass;
|
||||
@@ -213,122 +163,103 @@ namespace FluidSim.Components
|
||||
fuelInjected = true;
|
||||
}
|
||||
|
||||
// ----- Spark ignition -----
|
||||
double sparkAngle = 0.0 - SparkAdvance;
|
||||
if (sparkAngle < 0) sparkAngle += 720.0;
|
||||
|
||||
// Spark
|
||||
float sparkAngle = 0f - SparkAdvance;
|
||||
if (sparkAngle < 0f) sparkAngle += 720f;
|
||||
bool crossedSpark = (prevDeg < sparkAngle && currDeg >= sparkAngle) ||
|
||||
(prevDeg > sparkAngle + 360.0 && currDeg < sparkAngle);
|
||||
(prevDeg > sparkAngle + 360f && currDeg < sparkAngle);
|
||||
if (crossedSpark && !combustionActive && fuelInjected)
|
||||
{
|
||||
bool misfire = _random.NextDouble() < MisfireProbability;
|
||||
if (misfire)
|
||||
if (_random.NextDouble() < MisfireProbability)
|
||||
{
|
||||
combustionActive = false;
|
||||
}
|
||||
else
|
||||
{
|
||||
combustionActive = true;
|
||||
burnFraction = 0.0;
|
||||
double range = EnergyVariationFraction;
|
||||
_energyFactor = 1.0 + range * (2.0 * _random.NextDouble() - 1.0);
|
||||
combustionActive = true; burnFraction = 0f;
|
||||
float range = EnergyVariationFraction;
|
||||
_energyFactor = 1f + range * (2f * (float)_random.NextDouble() - 1f);
|
||||
}
|
||||
}
|
||||
|
||||
// ----- Combustion progress -----
|
||||
// Combustion
|
||||
if (combustionActive)
|
||||
{
|
||||
double angleSinceSpark = currDeg - sparkAngle;
|
||||
if (angleSinceSpark < 0) angleSinceSpark += 720.0;
|
||||
double newFraction = Wiebe(angleSinceSpark);
|
||||
|
||||
if (newFraction >= 1.0 || angleSinceSpark > (WiebeDuration + WiebeStart + SparkAdvance))
|
||||
float angleSinceSpark = currDeg - sparkAngle;
|
||||
if (angleSinceSpark < 0f) angleSinceSpark += 720f;
|
||||
float newFraction = Wiebe(angleSinceSpark);
|
||||
if (newFraction >= 1f || angleSinceSpark > (WiebeDuration + WiebeStart + SparkAdvance))
|
||||
{
|
||||
newFraction = 1.0;
|
||||
combustionActive = false;
|
||||
double totalMass = _airMass + _exhaustMass;
|
||||
_airMass = 0.0;
|
||||
_exhaustMass = totalMass;
|
||||
newFraction = 1f; combustionActive = false;
|
||||
float totalMass = _airMass + _exhaustMass;
|
||||
_airMass = 0f; _exhaustMass = totalMass;
|
||||
}
|
||||
|
||||
double dFraction = newFraction - burnFraction;
|
||||
if (dFraction > 0)
|
||||
float dFraction = newFraction - burnFraction;
|
||||
if (dFraction > 0f)
|
||||
{
|
||||
double dQ = fuelMass * FuelLowerHeatingValue * _energyFactor * dFraction;
|
||||
float dQ = fuelMass * FuelLowerHeatingValue * _energyFactor * dFraction;
|
||||
cylinderEnergy += dQ;
|
||||
_exhaustMass += fuelMass * dFraction;
|
||||
burnFraction = newFraction;
|
||||
}
|
||||
}
|
||||
|
||||
// ----- Heat loss -----
|
||||
double dQ_loss = HeatTransferCoefficient * CylinderWallArea *
|
||||
(Temperature - AmbientTemperature) * dt;
|
||||
// Heat loss
|
||||
float dQ_loss = HeatTransferCoefficient * CylinderWallArea *
|
||||
(Temperature - AmbientTemperature) * dt;
|
||||
cylinderEnergy -= dQ_loss;
|
||||
|
||||
// Update port states
|
||||
double p = Pressure, rho = Density, T = Temperature;
|
||||
double h = Gamma / (Gamma - 1.0) * p / Math.Max(rho, 1e-12);
|
||||
double af = AirFraction;
|
||||
|
||||
IntakePort.Pressure = p;
|
||||
IntakePort.Density = rho;
|
||||
IntakePort.Temperature = T;
|
||||
IntakePort.SpecificEnthalpy = h;
|
||||
IntakePort.AirFraction = af;
|
||||
|
||||
ExhaustPort.Pressure = p;
|
||||
ExhaustPort.Density = rho;
|
||||
ExhaustPort.Temperature = T;
|
||||
ExhaustPort.SpecificEnthalpy = h;
|
||||
ExhaustPort.AirFraction = af;
|
||||
float p = Pressure, rho = Density, T = Temperature;
|
||||
float h = Gamma / (Gamma - 1f) * p / MathF.Max(rho, 1e-12f);
|
||||
float af = AirFraction;
|
||||
IntakePort.Pressure = p; IntakePort.Density = rho;
|
||||
IntakePort.Temperature = T; IntakePort.SpecificEnthalpy = h; IntakePort.AirFraction = af;
|
||||
ExhaustPort.Pressure = p; ExhaustPort.Density = rho;
|
||||
ExhaustPort.Temperature = T; ExhaustPort.SpecificEnthalpy = h; ExhaustPort.AirFraction = af;
|
||||
}
|
||||
|
||||
public void UpdateState(double dt)
|
||||
public void UpdateState(float dt)
|
||||
{
|
||||
double dmAir = 0.0, dmExhaust = 0.0, dE = 0.0;
|
||||
|
||||
float dmAir = 0f, dmExhaust = 0f, dE = 0f;
|
||||
foreach (var port in _ports)
|
||||
{
|
||||
double mdot = port.MassFlowRate;
|
||||
double af = mdot >= 0 ? port.AirFraction : AirFraction;
|
||||
float mdot = port.MassFlowRate;
|
||||
float af = mdot >= 0f ? port.AirFraction : AirFraction;
|
||||
dmAir += mdot * af * dt;
|
||||
dmExhaust += mdot * (1.0 - af) * dt;
|
||||
dmExhaust += mdot * (1f - af) * dt;
|
||||
dE += mdot * port.SpecificEnthalpy * dt;
|
||||
}
|
||||
|
||||
_airMass += dmAir;
|
||||
_exhaustMass += dmExhaust;
|
||||
_airMass += dmAir; _exhaustMass += dmExhaust;
|
||||
cylinderEnergy += dE;
|
||||
|
||||
double V = Math.Max(cylinderVolume, 1e-12);
|
||||
float V = MathF.Max(cylinderVolume, 1e-12f);
|
||||
float currentP = (Gamma - 1f) * cylinderEnergy / V;
|
||||
if (currentP > MaxPressurePa) cylinderEnergy = MaxPressurePa * V / (Gamma - 1f);
|
||||
|
||||
double currentP = (Gamma - 1.0) * cylinderEnergy / V;
|
||||
if (currentP > MaxPressurePa)
|
||||
cylinderEnergy = MaxPressurePa * V / (Gamma - 1.0);
|
||||
|
||||
double currentRho = (_airMass + _exhaustMass) / V;
|
||||
double currentT = currentP / Math.Max(currentRho * GasConstant, 1e-12);
|
||||
float currentRho = (_airMass + _exhaustMass) / V;
|
||||
float currentT = currentP / MathF.Max(currentRho * GasConstant, 1e-12f);
|
||||
if (currentT > MaxTemperatureK)
|
||||
{
|
||||
double pAtTlimit = currentRho * GasConstant * MaxTemperatureK;
|
||||
cylinderEnergy = pAtTlimit * V / (Gamma - 1.0);
|
||||
float pAtTlimit = currentRho * GasConstant * MaxTemperatureK;
|
||||
cylinderEnergy = pAtTlimit * V / (Gamma - 1f);
|
||||
}
|
||||
|
||||
double totalMass = _airMass + _exhaustMass;
|
||||
if (totalMass < 1e-9)
|
||||
float totalMass = _airMass + _exhaustMass;
|
||||
if (totalMass < 1e-9f)
|
||||
{
|
||||
_airMass = 1e-9;
|
||||
_exhaustMass = 0.0;
|
||||
cylinderEnergy = 101325.0 * V / (Gamma - 1.0);
|
||||
_airMass = 1e-9f; _exhaustMass = 0f;
|
||||
cylinderEnergy = 101325f * V / (Gamma - 1f);
|
||||
}
|
||||
else if (cylinderEnergy < 0.0)
|
||||
else if (cylinderEnergy < 0f)
|
||||
{
|
||||
cylinderEnergy = 101325.0 * V / (Gamma - 1.0);
|
||||
cylinderEnergy = 101325f * V / (Gamma - 1f);
|
||||
}
|
||||
|
||||
if (_airMass < 0.0) _airMass = 0.0;
|
||||
if (_exhaustMass < 0.0) _exhaustMass = 0.0;
|
||||
if (_airMass < 0f) _airMass = 0f;
|
||||
if (_exhaustMass < 0f) _exhaustMass = 0f;
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user