The following papers have been accepted but have not been finalized (proof reading) yet.
«« Back

Effect of Active Flow Control of Endwall Synthetic Jet on the Performance of a Transonic Axial Compressor
Author(s): Guang Wang, W. L. Chu, Haoguang Zhang, Zhengtao Guo
Keywords: Transoninc axial compressor; aerodynamic performance improve; synthetic jet; endwall active flow control; numerical simulation.
In order to improve the performance of a high-load transonic axial compressor, this paper proposes a method of applying a synthetic jet to the end wall of the casing for active flow control. Taking NASA Rotor35 as the research object, the aerodynamic performance of the compressor is analyzed by applying three sets of synthetic jets with different excitation parameters at five different axial positions of 0%Ca, 25%Ca, 50%Ca, 75%Ca and 96.15%Ca. The results show that the three parameters of excitation position, jet peak velocity and jet frequency all have an effect on the performance of the compressor. The excitation position has the greatest influence on the flow margin of the compressor, and the best position is 25%Ca. After the peak jet velocity is increased from 100m/s to 150m/s, the flow margin, total pressure ratio and efficiency of the compressor are not greatly improved, which shows that the impact of the jet peak velocity is not as good as the excitation position. After continuing to increase the excitation frequency of the synthetic jet from 600 Hz to 1200 Hz, although the flow margin of the compressor is slightly reduced, the total pressure ratio and efficiency are further improved. This shows that there may be a threshold for the jet frequency, and only after the jet frequency is greater than the threshold can the overall aerodynamic performance of the compressor be improved.