Numerical study on the effect of suction on the flow field quality improvement in a plane cascade

Abstract

Abstract: Improving the quality of the cascade flow field is particularly important for the plane cascade wind tunnel experiment, clarifying the relevant parameters of the upper and lower side plate suction, and understanding the influence of the side plate suction on the flow field, numerical simulation methods were used to study the effect of the suction slit width and the suction back pressure for the improvement effect of flow field quality. The results show that by reasonably changing the suction variable, the inlet uniformity and outlet periodicity of the cascade three channels in the middle and lower part can be effectively improved, so that the deviation of the inlet and outlet Mach number is less than 0.01, the airflow angle deviation is less than 0.5°, and the outlet channel uses T5 passage to refer to a better periodicity within the same error range, it is clear that the selection of the position of the monitoring point in front of the grid should be between T4 - T6 passage, and that the suction gap is 20 mm and the suction back pressure is 80 kPa. Thus better flow field quality is achieved and engineering needs are met.

Key words: plane cascade, wind tunnel, flow field, suction, numerical simulation

CLC Number:

V235

BAI Jie, YANG Zhao, FU Wenguang, SUN Peng. Numerical study on the effect of suction on the flow field quality improvement in a plane cascade[J]. Journal of Civil Aviation University of China, 2022, 40(5): 51-58.

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