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Automotive intake manifold CFD modeling with resonance.

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Old   January 2, 2012, 14:14
Default Automotive intake manifold CFD modeling with resonance.
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Dan
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Hello,

I have a project I would like to do. I want to design and optimize an intake manifold for a 4 stroke piston engine.

I want to optimize inertial packing capability and pressure drop in the manifold while the engine is at 7000 RPM.

I understand this model will have to be transient unsteady.
I have the timing events for the valves opening and closing, so I can set the pressure boundary conditions at the manifold exit ports using a pressure vs. time profile. What should my pressure BC be assuming the valve goes from open to closed in a sinusoidal fashion?

I will be shooting for a Y+ of 1-2

I want to optimize port diameter and plenum volume for maximum flow into the intake ports.

I will be using CFX 13.0, what is the best way to go about modeling this?
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