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在叶尖折合切线速度为381m/s的条件下,利用跨声串列转子技术实现了总压比为2.25、负荷系数高达0.55的风扇转子设计。基于数值模拟结果,分析了串列转子前后排叶片独特的匹配特性,及其与常规压气机匹配特性不同的原因;并进一步推导验证了前后排叶片气动参数之间的解析关系,为利用常规压气机设计体系进行跨声串列转子设计提供数学物理模型。研究结果表明:在跨声串列转子工况从堵点向近失速点移动的过程中,前排叶片的工作特性与常规转子一样,而后排叶片的总温升、总压比则不断下降,该变化规律存在解析关系,并可以利用数学物理模型进行准确预测后排叶片的整体性能。
The blade rotor design with a total pressure ratio of 2.25 and a load factor of up to 0.55 was achieved with a tandem rotor technology at blade tip tangent speed of 381 m / s. Based on the numerical simulation results, the unique matching characteristics of the front and rear row of tandem rotors and their matching characteristics with conventional compressors are analyzed. The analytical relationship between the aerodynamic parameters of the front and rear row vanes is further deduced and verified. Machine design system for transonic array rotor design to provide mathematical physics model. The results show that the working characteristics of the front row of blades are the same as that of the conventional rotor in the condition of cross-series rotor operation from the blocking point to the stalling point, while the total temperature rise and the total pressure ratio of the row of rear blades continue to decline. The changing law exists analytic relationship, and can use mathematical physics model to accurately predict the overall performance of the rear row of blades.