本文对压比高达11的离心压气机叶轮及扩压器进行了初步设计。针对进口处叶尖马赫数高达1.6的特点,对叶轮进口处的复杂激波结构、轮缘处的低能量区域以及叶轮出口处的流动情况进行了分析。根据叶轮出口处流场分析结果,完成了有叶扩压器的设计,并和无叶扩压器的计算结果进行比较,结果表明所设计的有叶扩压器能够有效地提高压气机效率。
In this paper, a pressure ratio 11 centrifugal compressor with an inlet mach number of about 1.6 is preliminary designed. The complex shock boundary layer interation, low energy region in the vicinity of the casing and the outlet flow conditions are analysed. The vaneless and vaned diffusers are also designed. CFD results show that the vaned diffuser can effectively improve the compressor efficiency.