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为了研究高负荷风扇末级静叶的气动性能,通过在静子叶栅前加装导流叶片,来模拟多级风扇中动叶出口气流参数,通过旋转导叶改变静叶进口气流角,分析不同进口气流角和进口马赫数条件下的静叶气动特性。研究表明:本研究设计的导流叶片可以为静叶提供接近动叶出口条件的来流参数,从而开展静叶试验研究。该静叶为大折转角扩压叶栅,随马赫数增加,总压恢复系数减小。随转角增大,静叶压力面流动随导叶转角增加明显改善,分离范围减小;吸力面存在较大范围的分离,转角增加对分离范围影响不大。
In order to study the aerodynamic performance of the last stationary vane of high-load fan, the airflow parameters at the outlet of the multi-stage fan are simulated by adding the guide vanes in front of the stator vane. The airflow angle of the vane inlet is changed by rotating the guide vane. Aerodynamic characteristics of static vanes under inlet air flow angle and inlet Mach number. The research shows that the guide vane designed in this study can provide the impeller with the flow parameters close to the outlet conditions of the rotor blades so as to conduct the static vane experiment. The stator blade is a large-angle turning angle compressor cascade, with the Mach number increases, the total pressure reduction coefficient decreases. With the increase of rotation angle, the flow of pressure surface of stator vane obviously improves with the increase of guide vane angle, and the separation range decreases. There is a wide range of separation of suction surface and the increase of rotation angle has little effect on the separation range.