期刊
INTERNATIONAL JOURNAL OF TURBO & JET-ENGINES
卷 33, 期 4, 页码 353-360出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/tjj-2015-0039
关键词
standard k-epsilon model; turbulence anisotropy; non-equilibrium; tip leakage flow
资金
- National Natural Science Foundation of China [51376001, 51420105008, 51136003]
- National Basic Research Program of China [2012CB720205, 2014CB046405]
- Aeronautical Science Foundation of China [2012ZB51014]
- Beijing Higher Education Young Elite Teacher Project
The standard k-epsilon model (SKE) and the Reynolds stress model (RSM) are employed to predict the tip leakage flow (TLF) in a low-speed large-scale axial compressor rotor. Then, a new research method is adopted to freeze the turbulent kinetic energy and dissipation rate of the flow field derived from the RSM, and obtain the turbulent viscosity using the Boussinesq hypothesis. The Reynolds stresses and mean flow field computed on the basis of the frozen viscosity are compared with the results of the SKE and the RSM. The flow field in the tip region based on the frozen viscosity is more similar to the results of the RSM than those of the SKE, although certain differences can be observed. This finding indicates that the non-equilibrium turbulence transport nature plays an important role in predicting the TLF, as well as the turbulence anisotropy.
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