Stability Enhancement of a Single-Stage Transonic Axial Compressor Using Inclined Oblique Slots

Tien-Dung Vuong and Kwang-Yong Kim
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Tien-Dung Vuong: Department of Mechanical Engineering, Inha University, Incheon 22212, Korea
Kwang-Yong Kim: Department of Mechanical Engineering, Inha University, Incheon 22212, Korea

Energies, 2021, vol. 14, issue 9, 1-14

Abstract: A casing treatment using inclined oblique slots (INOS) is proposed to improve the stability of the single-stage transonic axial compressor, NASA Stage 37, during operation. The slots are installed on the casing of the rotor blades. The aerodynamic performance was estimated using three-dimensional steady Reynolds-Averaged Navier-Stokes analysis. The results showed that the slots effectively increased the stall margin of the compressor with slight reductions in the pressure ratio and adiabatic efficiency. Three geometric parameters were tested in a parametric study. A single-objective optimization to maximize the stall margin was carried out using a Genetic Algorithm coupled with a surrogate model created by a radial basis neural network. The optimized design increased the stall margin by 37.1% compared to that of the smooth casing with little impacts on the efficiency and pressure ratio.

Keywords: axial compressor; inclined oblique slots; RANS analysis; optimization; stall margin; genetic algorithm (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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