Unsteadiness of Tip Leakage Flow in the Detached-Eddy Simulation on a Transonic Rotor with Vortex Breakdown Phenomenon

Xiangyu Su, Xiaodong Ren, Xuesong Li and Chunwei Gu
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Xiangyu Su: Institute of Gas Turbine, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Xiaodong Ren: Institute of Gas Turbine, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Xuesong Li: Institute of Gas Turbine, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Chunwei Gu: Institute of Gas Turbine, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China

Energies, 2019, vol. 12, issue 5, 1-20

Abstract: Tip leakage vortex (TLV) in a transonic compressor rotor was investigated numerically using detached-eddy simulation (DES) method at different working conditions. Strong unsteadiness was found at the tip region, causing a considerable fluctuation in total pressure distribution and flow angle distribution above 80% span. The unsteadiness at near choke point and peak efficiency point is not obvious. DES method can resolve more detailed flow patterns than RANS (Reynolds-averaged Navier–Stokes) results, and detailed structures of the tip leakage flow were captured. A spiral-type breakdown structure of the TLV was successfully observed at the near stall point when the TLV passed through the bow shock. The breakdown of TLV contributed to the unsteadiness and the blockage effect at the tip region.

Keywords: tip leakage flow; detached-eddy simulation; vortex breakdown; transonic compressor (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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