REN Peng,LI Li-li,LIU Tai-qiu.Research on the Influence of Low Reynolds Number on the Compression Component of High-speed Turbine Engine[J].航空发动机,2023,49(1):68-75 |
Research on the Influence of Low Reynolds Number on the Compression Component of High-speed Turbine Engine |
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Key Words:low Reynolds number multi-stage compressor stability interstage matching aeroengine |
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Abstract:In order to analyze the influence of Reynolds number variation on the aerodynamic performance of a multi-stage compressor
at altitude range of 22.5 km for Mach number 3.0 high-speed turbine engine, the Wassell characteristic correction and empirical curve fit?
ting were used to evaluate the changes of efficiency, pressure ratio, and flow rate at the compressor operating point at low Reynolds number.
By using a program of S1, the flow characteristics of the airfoil under the condition of low Reynolds number were analyzed, and the design
law of the airfoil to reduce the influence of Reynolds number was discussed. The aerodynamic characteristics of typical ground and altitude
conditions were simulated by three-dimensional simulation with transition model, and the influence of low Reynolds number on the stabili?
ty of the multi-stage compressor was analyzed. The results show that the surge margin of the compressor at 18.5 km and 22.5 km above the
ground are reduced by 5.61% and 8.12% respectively. By comprehensively comparing the performance prediction results of the multi-stage
compressor by simulation method and empirical method, it is considered that the simulation method takes into account the influence of
multi-stage the compressor on the matching variation between stages at low Reynolds number conditions, and is more suitable for the pre?
diction of compressor's high-altitude full-speed characteristics. |
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