A-11 多段圧縮機の非定常流れにおける複雑形状の影響(空力・圧縮機,一般講演)

概要

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With the prospect of applying CFD to the development of a new advanced multistage axial compressor, the technical issues existing in CFD for multistage compressor must be clarified and resolved. One of the issues is the effect of real geometries in the test configuration, such as clearances between variable stator vanes and casing ("VSV clearances"), and shroud cavities and bleed ports. Interaction between these leakage flows and main path flow is considered to impact on the performance. In this paper, unsteady CFD for 6 stage high speed compressor has been performed to investigate how the VSV clearance affects the characteristic of a compressor. Calculation with VSV clearances was compared to the calculation of pure flow (without VSV clearances). As a result, it was confirmed that the leakage flow from VSV clearances has a large impact on the performance of multistage compressor. Aerodynamic loss caused by leakage flow from VSV clearance is appeared not only in front stages installing VSV but also in rear stages which leads to lower efficiency than pure flow path.
公益社団法人日本ガスタービン学会の論文
2010-10-20