1964-01-01

Computation of Instantaneous Air Flow and Volumetric Efficiency 640832

The presentation here of a computer program simulating an engine cycle emphasizes mechanical factors under the control of the engine designer rather than scientific aspects of combustion. Data secured by measuring valves, manifolds, and other parts on a flow bench are used to calculate instantaneous flow in and out of the cylinder for the firing engine. Heat transfer, finite time of combustion, and variable specific heat of the gas are also calculated. The program is particularly well adapted to indicating the direction and relative magnitude of the effect of changing one variable, such as valve size, at a time.

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