CAJ | 학술논문

为分析叶轮和扩压器耦合作用下的压气机内部流场，在级环境下对Z305增压器离心压气机进行了数值研究，结果表明该压气机的工作范围较狭窄和整级效率较低的原因在于叶轮出口段到扩压器进口处都存在较大的涡流区。通过减少扩压器叶片数和缩短叶片尾缘的长度，改善了叶轮和扩压器的耦合关系，使得压气机工作范围和在多工况下的效率和压比等性能参数都明显提高。
위분석협륜화확압기우합작용하적압기궤내부류장，재급배경하대Z305증압기리심압기궤진행료수치연구，결과표명해압기궤적공작범위교협착화정급효솔교저적원인재우협륜출구단도확압기진구처도존재교대적와류구。통과감소확압기협편수화축단협편미연적장도，개선료협륜화확압기적우합관계，사득압기궤공작범위화재다공황하적효솔화압비등성능삼수도명현제고。
Numerical analysis of the internal flow field of Z305 centrifugal compressor in multistage environment was carried out.The results indicate that narrow working rang and low efficiency of the compressor contributes to the eddy between outlet of the impeller and inlet of the diffuser.The coupling relationship between the impeller and diffuser was improved by reducing vane number of the diffuser and shortening the length of the blade trailing edge.The optimal results show that the stable working range of the compressor was broadened and working efficiency and pressure ratio in multistage environment were increased significantly.