Numerical Investigation of Cavitating Jet Flow Field with Different Turbulence Models

Lidong Li, Yan Xu (), Mingming Ge (), Zunce Wang, Sen Li and Jinglong Zhang ()
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Lidong Li: College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China
Yan Xu: College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China
Mingming Ge: School of Engineering, Westlake University, Hangzhou 310024, China
Zunce Wang: College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China
Sen Li: College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China
Jinglong Zhang: College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China

Mathematics, 2023, vol. 11, issue 18, 1-18

Abstract: In numerous industries such as drilling, peening, cleaning, etc., a cavitating jet is adopted. However, it is challenging to simulate the cavitating flow field numerically with accuracy. The flow field of the organ pipe cavitation nozzle is simulated in this research using the RNG k − ε , DES, and LES turbulence models. The LES model can more accurately predict the periodic shedding of a cavitating cloud, which is basically consistent with the jet morphology captured with a high−speed camera. The flow pattern, cavitating cloud evolution and shedding period of a cavitating jet are analyzed. The findings demonstrate that the LES model produces a cavitating effect inside the nozzle that is superior to those produced by the RNG k − ε and DES models. The vortex rings in the diffusion section are simulated using the LES model, which accelerates cavitation. The cavitating clouds of the organ pipe nozzle show periodic evolutions, with stages of generation, development, shedding and collapse. The periodic shedding of the cavitating clouds exhibits a similar pattern in the vorticities simulated using the LES model, and the vorticities display the small-scale structures where the cavitating bubbles collapse. This study can provide a reference for the simulation of a cavitating jet and the analysis of the cavitating mechanism.

Keywords: cavitating nozzle; cavitating cloud; LES; high-speed photography (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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