Abstract
As the main power of rotor aircraft, the turboshaft engine has always been the focus of scientific and engineering research and has achieved rich research results. This paper reviews and summarizes the research results at home and abroad in the past 10 years from the aspects of control systems, oil-electric mixing, pollutant emission and compressor internal flow field optimization. High altitude and low temperature is the best condition for turboshaft engine operation. Pre-mission fuel estimation is good for low emissions. Oil-electric mixing engines can effectively improve efficiency, but reducing weight and cost is a problem that needs to be solved. The interaction between the leakage vortex and the excitation wave in the compressor increases the total pressure loss in the vortex core downstream of the excitation wave. The modes associated with wheezing can be stabilised by feeding back small-amplitude perturbations. The universality of the surge suppression of transonic centrifugal compressors and the stability of most of the compressor surges by small disturbance feedback are the next research focus.
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