Engine pressure ratio

The engine pressure ratio (EPR) is the total pressure ratio across a jet engine, measured as the ratio of the total pressure at the exit of the propelling nozzle divided by the total pressure at the entry to the compressor.

In many gas turbine engines, the EPR is used as the engine rating parameter, i.e. as an easily measurable indication of the thrust that the engine is currently producing.

单词	Engine pressure ratio
释义	Engine pressure ratio 英语百科 Engine pressure ratio The engine pressure ratio (EPR) is the total pressure ratio across a jet engine, measured as the ratio of the total pressure at the exit of the propelling nozzle divided by the total pressure at the entry to the compressor. In many gas turbine engines, the EPR is used as the engine rating parameter, i.e. as an easily measurable indication of the thrust that the engine is currently producing.
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