流体机械
流體機械
류체궤계
Fluid Machinery
2015年
10期
31-36
,共6页
李振华%孙玉莹%李云%马健峰%王宇%孙洋
李振華%孫玉瑩%李雲%馬健峰%王宇%孫洋
리진화%손옥형%리운%마건봉%왕우%손양
流量系数%叶顶间隙%CFD
流量繫數%葉頂間隙%CFD
류량계수%협정간극%CFD
flow coefficient%tip clearance%CFD
通过 CFD 技术，分析了不同流量系数下叶顶间隙对离心压缩机模型级性能的影响。结果表明，对于中、小流量系数模型级，叶顶间隙越大，其效率曲线下降越大，而对于大流量系数模型级，有一定的叶顶间隙可改善叶轮内流场，反而有利于离心压缩机效率性能。无论何种流量系数模型级，存在一定的叶顶间隙则可提升能头曲线。
通過 CFD 技術，分析瞭不同流量繫數下葉頂間隙對離心壓縮機模型級性能的影響。結果錶明，對于中、小流量繫數模型級，葉頂間隙越大，其效率麯線下降越大，而對于大流量繫數模型級，有一定的葉頂間隙可改善葉輪內流場，反而有利于離心壓縮機效率性能。無論何種流量繫數模型級，存在一定的葉頂間隙則可提升能頭麯線。
통과 CFD 기술，분석료불동류량계수하협정간극대리심압축궤모형급성능적영향。결과표명，대우중、소류량계수모형급，협정간극월대，기효솔곡선하강월대，이대우대류량계수모형급，유일정적협정간극가개선협륜내류장，반이유리우리심압축궤효솔성능。무론하충류량계수모형급，존재일정적협정간극칙가제승능두곡선。
The CFD technology is employed to numerically study the influence of blade tip clearance on the performance of centrifugal compressor models with different flow coefficients.The results show that the compressor efficiency is decreased as the increase of the blade tip clearance for the compressor models with both medium and small flow coefficients.However,as for the compressor models with large flow coefficient,the presence of blade tip clearance can be beneficial to the compressor effi-ciency due to the improved flow field.Besides,the blade tip clearance can generally help to increase the compressor energy head.
