| Citation: | ZHANG Qingdian, MA Hongwei, YANG Yi, et al. Effect of airfoil probe head on transonic turbine cascade flow field[J]. Journal of Aerospace Power, 2022, 37（11）：2647-2658 doi: 10.13224/j.cnki.jasp.20220241
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In order to investigate the effects of airfoil probe head on the transonic flow field, a numerical simulation was performed in the transonic turbine cascade with airfoil probes installed at the different heights of blade’s leading edge. The variations of blade’s load performance, vortex structure, flow loss and applicability of probes with different incidence angles were analyzed. The results indicated that the airfoil probe’s head affected the loading performance of the blade, and the effect was quite sensitive to the flow incidence angles. A long streamwise vortex induced by the probe head was formed. And an attached vortex layer appeared on the suction surface of the blade at a large positive incidence angle. This attached vortex layer was the main factor for the decline of the load performance of the blade with the airfoil probes. The proportion of flow loss contributed by probes at each slice of the cascade passage decreased gradually along the flow direction. Compared with original cascade, the flow loss behind the cascade increased by 7.4% at high incidence angle. The probes installed at different positions in the spanwise direction had good applicability in the whole range of adjustable incidence angle.
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