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Energies 2014, 7(12), 7994-8007; doi:10.3390/en7127994

Corner Separation Control by Boundary Layer Suction Applied to a Highly Loaded Axial Compressor Cascade

1,2
,
1,2,* and 1,2
1
National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics, School of Energy and Power Engineering, Beihang University, Xueyuan Road 37, Haidian District, Beijing 100191, China
2
Collaborative Innovation Center of Advanced Aero-Engines, Xueyuan Road 37, Haidian District, Beijing 100191, China
*
Author to whom correspondence should be addressed.
Received: 18 October 2014 / Revised: 12 November 2014 / Accepted: 14 November 2014 / Published: 27 November 2014
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Abstract

Control of corner separation has attracted much interest due to its improvement of performance and energy utilization in turbomachinery. Numerical studies have been performed under both design and off-design flow conditions to investigate the effects of boundary layer suction (BLS) on corner separation in a highly loaded compressor cascade. Two new BLS slot configurations are proposed and a total of five suction slot configurations were studied and compared. Averaged static pressure rise, exit loss coefficient, passage blockage and flow turning angle have been given and compared systematically over a range of operation incidence angles. Distributions of significant loss removal, blade loading, exit deviation and total pressure loss at 3 degree and 7 degree incidence have also been studied. Under the same suction mass flows of 0.7% of the inlet mass flows, the pitchwise suction slot on the endwall shows a better optimal performance over the whole operation incidence among single suction slots. By using of the new proposed compound slot configuration with one spanwise slot on the blade suction side and one pitchwise slot on the endwall, the maximum reduction of total pressure loss at 7 degree incidence can be 39.4%. View Full-Text
Keywords: boundary layer suction; corner separation; flow control; compressor boundary layer suction; corner separation; flow control; compressor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Liu, Y.; Sun, J.; Lu, L. Corner Separation Control by Boundary Layer Suction Applied to a Highly Loaded Axial Compressor Cascade. Energies 2014, 7, 7994-8007.

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