期刊
INTERNATIONAL JOURNAL OF TURBOMACHINERY PROPULSION AND POWER
卷 4, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/ijtpp4040042
关键词
turbocharger; centrifugal compressor; surge margin; CFD; optimization
资金
- Federal Ministry for Economic Affairs and Energy of Germany (BMWi) in the project GAMMA [03ET1469]
Currently, 3D-CFD design optimization of centrifugal compressors in terms of the surge margin is one major unresolved issue. On that account, this paper introduces a new kind of objective function. The objective function is based on local flow parameters present at the design point of the centrifugal compressor. A centrifugal compressor with a vaned diffuser is considered to demonstrate the performance of this approach. By means of a variation of the beta angle distribution of the impeller and diffuser blade, 73 design variations are generated, and several local flow parameters are evaluated. Finally, the most promising flow parameter is transferred into an objective function, and an optimization is carried out. It is shown that the new approach delivers similar results as a comparable optimization with a classic objective function using two operating points for surge margin estimation, but with less computational effort since no second operating point near the surge needs to be considered.
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