| Citation: | WANG Shiqi, WEN Quan. Numerical and experimental study on the characteristics of self-excited sweeping nozzle[J]. Journal of Aerospace Power, 2025, 40（5）：20220923 doi: 10.13224/j.cnki.jasp.20220923
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Self-excited sweeping nozzle can generate high-frequency self-excited oscillating liquid spray driven by the working pressure, through the symmetrical design of internal Coanda wall surfaces and feedback channels. In order to explore the application potential of this new nozzle to fuel injection in gas turbine engine, by taking advantage of the 2D numerical simulation and high-speed shadow imaging method, the nozzle’s characteristic velocity, working frequency, sweeping angle responses to the working pressures were comprehensively studied using various working media and scaling dimensions. The results showed that the self-excited sweeping nozzle can generate stable sweeping oscillating spray within a wide working pressure range (0.01—5 MPa) and characteristic dimension range (0.3—7 mm), its sweeping angle was larger than 70°, and oscillating frequency was higher than
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