Journal of Dalian Maritime University >
2015 , Vol. 41 >Issue 2: 71 - 76
DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2015.02.013
Two dimensional unsteady numerical investigation in a highly loaded compressor cascade
Received date: 2014-05-26
Revised date: 2014-09-17
Online published: 2015-06-07
In order to explore the mechanism of unsteady flow in a highly loaded compressor cascade with large positive incidence,the separation vortices evolution and the effect of the vortices on flow field parameters were analyzed and discussed with the topological analysis and numerical simulation method.Results show that there are two kinds of vortices in cascade passage at incidence of +15°,suction surface separation vortex and trailing edge shedding vortex.The vortex-shedding frequency of suction surface separation vortex is 104.7 Hz.The double frequency 211.5 Hz is caused by the alternative shedding of trailing edge shedding vortex and suction surface separation vortex.During the development process of the separation vortex,it may restrain and merge puny vortices.Meanwhile the separation vortex makes the aerodynamic loading of blade rise obviously.
LU Hua-wei* , KANG Da , ZHANG Yong-chao . Two dimensional unsteady numerical investigation in a highly loaded compressor cascade[J]. Journal of Dalian Maritime University, 2015 , 41(2) : 71 -76 . DOI: 10.16411/j.cnki.issn1006-7736.2015.02.013
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