Correlation of Convective Heat Transfer for Steady Intake-Flow Through a Poppet Valve

A simulated I.C. engine intake system composed of intake port, intake valve, and cylinder was used to obtain intake port heat transfer information. The effect of air direction and valve lift on the heat transfer from the hot intake valve to intake air was determined. It was found that a higher rate of heat transfer occurred at the same rate of flow, for a smaller inclination angle. Decreased valve lift was also found to yield a higher rate of heat transfer for the same flow.