한국전산유체공학회:학술대회논문집
- 한국전산유체공학회 2008년도 춘계학술대회논문집
- /
- Pages.152-155
- /
- 2008
원심압축기의 성능에 미치는 형상변수들의 영향에 대한 수치적 연구
Numerical Study on Effects of Geometrical Variables on Performance of A Centrifugal Compressor
초록
In this paper, the effect of modification of geometric variables on the performance of a centrifugal compressor blade has been studied numerically. The compressor contains six main blades and six splitter blades. Reynolds averaged Navier-Stokes (RANS) equations with shear stress turbulence (SST) model are discretized by finite volume approximations and solved on hexahedral grids for flow analysis. The design variables from blade lean angle at tip and middle of the blade have been modified. The isentropic blade efficiency and pressure have been predicted with the variation of the variables. Frozen rotor simulation is performed and adiabatic wall condition has been used. One of the six blades of compressor has been used for simulation to reduce the computational load. Optimum number of meshes has been selected by grid-dependency test, and this is used for all the simulations with changing geometric variables. The detailed flow analysis results have been reported as well as the effects of the variables.
키워드