| Abstract:Measurement experimental investigations were carried out to obtain hammershock characteristics parameters after an
aeroengine surge. The influence of different surge initiating methods on hammershock parameters measurement was discussed, the measure?
ment method for hammershock characteristics was formulated, and parameters such as surge overpressure, surge overpressure ratio, and
surge overpressure loading time were used to evaluate hammershock characteristics. By using an inlet insert plate distortion generator and
varying the plate depth, the hammershock characteristic parameters after engine surge under the take-off and cruise conditions were
obtained, and the test results were analyzed. The results show that the hammershock intensities generated by surge differ under different
engine conditions. the generated hammershock propagates upstream axially, its intensity exhibits an increasing trend during propagation,
but it basically propagates uniformly, the surge overpressure ratios range from 1.116 to 1.57. The higher the intensity of the hammershock,
the faster the propagation speed is. The hammershock loading time ranges from 9.1ms to 48.8ms. |
