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Research Papers

Experimental Investigation on the Effects of Unsteady Excitation Frequency of Casing Treatment on Transonic Compressor Performance

[+] Author and Article Information
Wei Tuo

 Beijing Aeronautical Engineering Technology Research Center, Beijing 100076, China

Yajun Lu, Wei Yuan, Sheng Zhou, Qiushi Li

National Key Laboratory on Aero-Engine, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

J. Turbomach 133(2), 021014 (Oct 22, 2010) (6 pages) doi:10.1115/1.4000581 History: Received July 22, 2009; Revised August 08, 2009; Published October 22, 2010; Online October 22, 2010

The importance of the unsteady effects between the casing treatment and rotor is still not clear. Experiments are conducted in a transonic compressor with arc skewed slot casing treatment configurations. The experimental results indicate that the unsteady excitation frequency due to the slot number of casing treatment is one of the most important factors influencing compressor performance. Also, compressor performance can be overall enhanced through optimizing this unsteady excitation frequency. For the transonic compressor herein, peak efficiency, stall margin, and maximum flow mass can be improved by 0.17%, 19.86%, and 0.81%, respectively, at near design rotating speed, which can reach up to 1.13%, 57.84%, and 1.57%, respectively, at part design speed.

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Figures

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Figure 1

Schematic of the transonic compressor facility

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Figure 2

Arc skewed slot casing treatment ring

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Figure 3

Torque efficiency characteristics under different excitation frequencies of the casing treatment: (a) torque efficiency characteristics and (b) detailed curves with the focus on the peak efficiency points

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Figure 4

Total pressure ratio characteristics under different excitation frequency of the casing treatment

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Figure 5

Peak efficiency and stall margin under different excitation frequencies of the casing treatment

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Figure 6

Spanwise distribution of the total pressure ratio behind stage near stall of the solid case at 65% design speed

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Figure 7

Spanwise distribution of the total pressure ratio behind stage near stall of the solid case at 98% design speed

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Figure 8

Maximum mass flow increment under different excitation frequencies of the casing treatment

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