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the detector 31 to avoid stalling engines of gas turbines and method for determining the proximity of the engine stalls or the detector
the detector 31 to avoid stalling engines of gas turbines and method for determining the proximity of the engine stalls or the detector
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机译:检测器31以避免燃气轮机的发动机失速以及确定发动机失速或检测器的接近度的方法
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摘要
A pair of pressure transducers are connected to pressure probes positioned in a flow passage of a turbofan engine downstream of the fan and respond to pressure fluctuations which occur in the airstream. One transducer has a high response capability, and its output is passed through a band-pass filter to isolate the high frequencies of interest. The other transducer has a low response capability, and its output is passed through a low-pass filter to provide the steady state pressure level. A triggering level is scheduled as a function of the steady state pressure level, and a comparator is used to continuously compare the triggering level with the level of the high frequency pressure signal produced in the band-pass filter. If the amplitude of the high frequency pressure is greater than that of the triggering level, the engine is approaching a surge or stall condition, and a warning signal is generated which may be used to institute corrective action.
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