Numerical Simulation of Three-Dimensional Separated Flow in a Linear Compressor Cascade
This paper presentsa comprehensive numerical study of the three-dimensionnal corner separation in a linear compressor cascade. The configuration corresponds to the experimental campaign performed by Dr. Ma Wei at Laboratoire de Mecanique des Fluides et d Acoustique (LMFA), at a chord-based Reynolds number of 3. 82 × 102. Attention is focused on a specific angle of attack of 4°, where the three-dimensional corner separation is clearly observed. The present work uses an in-house Navier-Stokes solver (TurbFlow) to simulate the separated flow in the compressor cascade. The Reynolds-averaged Navier-Stokes (RANS) equations are closed with the two-equation k -ω turbulence model of Wilcox. Comparisons between numerical and experimental results are presented in the paper, including (1) skin friction lines, (2) static pressure coefficient on the blade and the end-wall, (3) velocity profiles in the passage, and (4) total pressure loss coefficient on a plane downstream of the trailing edge. A very good description of the flow is achieved at mid-span, when the tripping bands are implemented in the simulation. In the end-wall region, a particular attention is paid to the description of the inflow boundary layer, which is supposed to influence the corner separation. According to the losses and the velocity profiles, the CFD appears to slightly under-estimate the corner separation extent, while the effect on the wall-pressure is over-estimated. These observations bring new perspectivesto continue the analysis of this complex flow and improve its description by CFD.
complex internal flow compressor cascade corner separation CFD RANS
GAO Feng MA Wei Boudet Jerome Ottavy Xavier LU Lipeng Leboeuf Francis
Laboratoire de Mecanique des Fluides et.dAcoustique, Ecole Centrale de Lyon, 69134 Ecully, France S Laboratoire de Mecanique des Fluides et.dAcoustique, Ecole Centrale de Lyon, 69134 Ecully, France School of Jet Propulsion, Beihang University, 100191 Beijing, China
国际会议
4th International Symposium on Jet Propulsion and Power Engineering(第四届喷气推进与动力工程国际会议 ISJPPE2012)
西安
英文
149-156
2012-09-10（万方平台首次上网日期，不代表论文的发表时间）