Unsteady Numerical Calculation of Oblique Submerged Jet

Energies

Li Cheng¹  Weixuan Jiao¹  Chuan Wang¹  Di Zhang¹  Tao Wang² 

[1] College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China;Key Laboratory of Fluid and Power Machinery, Ministry of Education, School of Energy & Power Engineering, Xihua University, Chengdu 610039, China;

关键词: unsteady flow;    numerical simulation;    submerged jet;   

DOI  :  10.3390/en13184728

来源: DOAJ

【 摘 要 】

A water jet is a kind of high-speed dynamic fluid with high energy, which is widely used in the engineering field. In order to analyze the characteristics of the flow field and the change of law of the bottom impact pressure of the oblique submerged impinging jet at different times, its unsteady characteristics at different Reynolds numbers were studied by using the Wray–Agarwal (W-A) turbulence model. It can be seen from the results that in the process of jet movement, the pressure at the peak of velocity on the axis was the smallest, and the velocity, flow angle, and pressure distribution remain unchanged after a certain time. In the free jet region, the velocity, flow angle, and pressure remained unchanged. In the impingement region, the velocity and flow angle decreased rapidly, while the pressure increased rapidly. The maximum pressure coefficient of the impingement plate changed with time and was affected by the Reynolds number, but the distribution trend remained the same. In this paper, the characteristics of the flow field and the law of the impact pressure changing with time are described.

【 授权许可】

Unknown