A Numerical Simulation of the Underwater Supersonic Gas Jet Evolution and Its Induced Noise
نویسندگان
چکیده
To explore the complex flow field and noise characteristics of underwater high-speed gas jets, mixture multiphase model, large eddy simulation method, Ffowcs Williams–Hawking (FW–H) acoustic model were used for simulations, numerical methods validated by jet experimental results. The results revealed that during initial stages, collided with water surface created low-pressure high-temperature bubbles, accompanied much high-frequency noise. When reached its maximum length, impact weakened, bubble broke, transformed into a conical shape, changed from high- to low-frequency. pressure fluctuation peaked near position at which Mach number 1, indicating was most unstable sonic point. Additionally, low frequencies, sound levels between jets different nozzle ratios similar, whereas above 400 Hz, under-expanded had higher levels. This paper provides theoretical guidance study
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ژورنال
عنوان ژورنال: Applied sciences
سال: 2023
ISSN: ['2076-3417']
DOI: https://doi.org/10.3390/app13148336