| QUE Jian-feng， YAN Hong-ming， YING Ji-yong.High-altitude Starting Prediction Method Based on Model Correction[J].航空发动机,2024,50(3):58-63 |
| High-altitude Starting Prediction Method Based on Model Correction |
| DOI： |
| Key Words:starting model correction method model prediction high-altitude starting test aeroengine |
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| Abstract:In response to the problem of low accuracy in predicting engine starting process using starting models based on component
characteristics， the calculation method of the starting model was studied by establishing an iterative solution equation for the starting
model. Based on the correction coefficient of combustion efficiency， the heat transfer coefficient of the heat absorption and release model，
and the additional loss correction coefficient ， the key engine starting parameters were matched and the model correction method was
studied. Based on the starting model derived from engine component characteristics and combined with the ground starting data， the
model-calculated data was consistent with the test data， and the validity of the starting model correction was verified. The model was used
to predict air starting and compared with the test results. The results show that the compressor common working line and rotor acceleration
rate of the starting test are in good agreement with the corrected model， and the difference in the turbine outlet exhaust gas temperature is
reasonable. The starting model correction method can efficiently support high-altitude starting tests， make air starting tests at boundary
working points of the starting envelope successful in one go， and reduce test risk and cost. |
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