According to the actual operational condition of engine, calculate dynamics with different rotational speed and breakout pressure, and get the surface vibration speed stage of engine.

根据车用发动机的实际使用工况，在不同转速及爆发压力下对其进行动力学计算，得到发动机的表面振动速度级。

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Film cooling of the surface of a gas turbine blade was studied in a large-scale low-speed opening wind tunnel according to actual requirement of the design of aero-engine.

根据航空发动机设计的实际需要，在大尺寸低速叶栅传热风洞中对涡轮叶片表面的气膜冷却进行了综合性实验研究。

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At a shift-down time, the target value of the engine speed is set according to the actual speed determined from the signal of the input shaft speed of the transmission system.

在换低速档时，根据从变 速装置的输入轴转速的信号求得的实际车速，来设定发动机转速的目标值。

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The investigation found that the autorotation training the pilot received was not representative of an actual engine failure at cruise speed, which likely contributed to his failure to successfully execute the maneuver.

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