دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a multi-bladed propeller usually installed behind an engines radiator, which moves air over an engine. It helps cool the engine and equalizes the temperature of the air as it flows over the engine, thus preventing hot spots. Engine power usually operates the fan, although some fans have auxiliary electric motors that power them when the engine is stopped.