| Citation: | WANG Zhihui, WEI Haiqiao, WANG Hongbo, et al. Influence of pulse frequencies on fluid flow of a twin entry radial turbine rotor inlet[J]. Journal of Aerospace Power, 2025, 40（3）：20230394 doi: 10.13224/j.cnki.jasp.20230394
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In order to better understand the impact of pulse frequency on the flow characteristics of the twin entry turbine rotor inlet, ANSYS CFX software was applied to numerical calculation of two-channel radial turbines with different frequencies (20, 40, 80 Hz) under the condition of pulse intake, while the distribution law of rotor inlet incidence angle in one pulse period, and the distribution law of blade height and circumferential direction were obtained. The results showed that in one pulse period, there were two peaks and two troughs in the incidence angle of the rotor inlet, the incidence angle near the crest decreased with the increase of frequency, and the incidence angle near the trough increased with the increase of frequency. The incidence angle distribution along the blade height took 0.5 blade height as the dividing point, and the incidence angle of the blade root part and the blade height part presented an opposite trend with the frequency. When the inlet pressure of blade root branch was larger, the inlet flow characteristics of twin entry turbines were more stable.
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