Browse Publications Technical Papers 790609
1979-02-01

Determination of Cooling Air Mass Flow for a Horizontally - Opposed Aircraft Engine Installation# 790609

The relationship between the amount of cooling air flow and the corresponding flow pressure difference across an aircraft engine was investigated in flight and on the ground. The flight test results were consistent with theory, but indicated a significant installation leakage problem. A ground test blower system was used to identify and reduce the leakage. The correlation between ground test cell determined engine orifice characteristics and flight measurements showed good agreement if the engine pressure difference was based on total pressure rather than static pressure.

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