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This commit is contained in:
max
2026-06-09 17:49:11 +02:00
parent 1489f278dc
commit 21a62fb46e
6 changed files with 401 additions and 192 deletions
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42
Scenarios/SingleCylScenario.cs
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@@ -30,7 +30,7 @@ namespace FluidSim.Tests
private double dt;
private int stepCount;
public float MaxThrottleArea = 1e-4f; // 1 cm²
public float MaxThrottleArea = 100e-4f; // 1 cm²
// pipe area for open end calculations
private float pipeArea;
@@ -41,9 +41,9 @@ namespace FluidSim.Tests
// ---- Crankshaft ----
crankshaft = new Crankshaft(600);
crankshaft.Inertia = 0.2f;
crankshaft.Inertia = 0.05f;
crankshaft.FrictionConstant = 2f;
crankshaft.FrictionViscous = 0.04f;
crankshaft.FrictionViscous = 0.01f;
// ---- Cylinder ----
float bore = 0.056f, stroke = 0.057f, conRod = 0.110f, compRatio = 9.2f;
@@ -77,12 +77,12 @@ namespace FluidSim.Tests
pipeSystem = new PipeSystem(totalCells, pipeStart, pipeEnd, area, dx,
1.225f, 0f, 101325f);
pipeSystem.DampingMultiplier = 0.5f;
pipeSystem.EnergyRelaxationRate = 0f;
pipeSystem.DampingMultiplier = 1.0f;
pipeSystem.EnergyRelaxationRate = 0.5f;
pipeSystem.AmbientPressure = 101325f;
// ---- Volumes ----
intakePlenum = new Volume0D(5e-6f, 101325f, 300f); // 5 mL
intakePlenum = new Volume0D(100e-6f, 101325f, 300f); // 100 mL
plenumInlet = intakePlenum.CreatePort();
plenumOutlet = intakePlenum.CreatePort();
exhaustCollector = new Volume0D(10e-6f, 101325f, 800f); // 10 mL (unused but present)
@@ -130,8 +130,8 @@ namespace FluidSim.Tests
solver.AddComponent(exhaustCollector);
// ---- Sound ----
exhaustSound = new SoundProcessor(sampleRate, 1f) { Gain = 1f };
intakeSound = new SoundProcessor(sampleRate, 1f) { Gain = 1f };
exhaustSound = new SoundProcessor(sampleRate, 1f) { Gain = 20f };
intakeSound = new SoundProcessor(sampleRate, 1f) { Gain = 20f };
reverb = new OutdoorExhaustReverb(sampleRate);
stepCount = 0;
@@ -163,11 +163,31 @@ namespace FluidSim.Tests
if (stepCount % 1000 == 0)
{
float rpm = crankshaft.AngularVelocity * 60f / (2f * MathF.PI);
Console.WriteLine($"Step {stepCount}, RPM={rpm:F0}, CylP={cylinder.Pressure / 1e5f:F2} bar");
Console.WriteLine($"intake flow: {intakeFlow:F12}, exhaust flow: {exhaustFlow:F16}");
float crankDeg = crankshaft.CrankAngle; // public property on Cylinder
Console.WriteLine($"Step {stepCount}, CA={crankDeg:F1} deg, RPM={rpm:F0}, CylP={cylinder.Pressure / 1e5f:F2} bar");
Console.WriteLine($" intake flow: {intakeFlow:F6}, exhaust flow: {exhaustFlow:F6}");
// Pipe 0 (intake before throttle)
var (r0L, u0L, p0L) = pipeSystem.GetInteriorStateLeft(0);
var (r0R, u0R, p0R) = pipeSystem.GetInteriorStateRight(0);
Console.WriteLine($" Pipe0 L: rho={r0L:F4} u={u0L:F3} p={p0L/1e5:F3}bar | R: rho={r0R:F4} u={u0R:F3} p={p0R/1e5:F3}bar");
// Pipe 1 (runner)
var (r1L, u1L, p1L) = pipeSystem.GetInteriorStateLeft(1);
var (r1R, u1R, p1R) = pipeSystem.GetInteriorStateRight(1);
Console.WriteLine($" Pipe1 L: rho={r1L:F4} u={u1L:F3} p={p1L/1e5:F3}bar | R: rho={r1R:F4} u={u1R:F3} p={p1R/1e5:F3}bar");
// Pipe 2 (exhaust)
var (r2L, u2L, p2L) = pipeSystem.GetInteriorStateLeft(2);
var (r2R, u2R, p2R) = pipeSystem.GetInteriorStateRight(2);
Console.WriteLine($" Pipe2 L: rho={r2L:F4} u={u2L:F3} p={p2L/1e5:F3}bar | R: rho={r2R:F4} u={u2R:F3} p={p2R/1e5:F3}bar");
// Plenum and cylinder mass
Console.WriteLine($" Plenum P={intakePlenum.Pressure/1e5:F3}bar, mass={intakePlenum.Mass:E4} kg");
Console.WriteLine($" Cyl mass={cylinder.Mass:E4} kg");
}
return reverb.Process(intakeDry);
return reverb.Process(intakeDry + exhaustDry);
}
public override void Draw(RenderWindow target)