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基于多子区平行压气机彻体力模型,就某风扇特性和S2流面计算结果进行了气动稳定性的评估与分析。介绍了进口流场畸变对风扇稳定性影响的数学模型,并阐述了该模型的求解方法;计算和分析了压力畸变对风扇稳定性影响的结果,并讨论了压力畸变在风扇系统中的传递和分布情况。计算结果表明:风扇在相对换算转速75%下稳定裕度储备可能不足;中低转速下的导叶调节规律需要优化,同时还需对中低转速下的总体匹配做进一步分析。
Based on the multi-subarea parallel turbomachine model, the aerodynamic stability of a certain fan and S2 flow surface was evaluated and analyzed. The mathematical model of the influence of flow field distortion on the stability of the fan is introduced and the method of solving the model is expounded. The influence of pressure distortion on the stability of the fan is analyzed and analyzed. The transmission of pressure distortion in the fan system is discussed Distribution. The calculation results show that the reserve of the stability margin of the fan may not be sufficient under the relative conversion speed of 75%. The regulation of the guide vanes at low speed needs to be optimized, and the overall matching at low speed needs to be further analyzed.