期刊
ENERGIES
卷 13, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/en13071744
关键词
impinging water jet; impinging height; numerical calculation
资金
- National Natural Science Foundation of China [51979240, 51609105]
- Priority Academic Program Development of Jiangsu Higher Education Institutions [PAPD]
- Open Research Subject of Key Laboratory of Fluid and Power Machinery (Xihua University), Ministry of Education [szjj2016-061]
- Changzhou SciTech Program [CJ20190048]
- Visiting Researcher Fund Program of State Key Laboratory ofWater Resources and Hydropower Engineering Science [2017SDG02]
As a kind of water jet technology with strong impinging force and simple structure, the submerged impinging water jet can produce strong scouring action on subaqueous sediments. In order to investigate the flow field characteristics and impinging pressure of submerged impinging water jets at different impinging heights, the Wray-Agarwal (W-A) turbulence model is used for calculation. The velocity distribution and flow field structure at different impinging heights (1 <= H/D <= 8), and the impinging pressure distribution at the impingement plate under different Reynolds numbers (11, 700 <= Re <= 35100) are studied. The results show that with the increase of the impinging height, the diffusion degree increases and the velocity decreases gradually when the jet reaches the impingement region. The fluid accelerates first and then decelerates near the stagnation point. The maximum impinging pressure and the impinging pressure coefficient decrease with the increase of the impinging height, but the effective impinging pressure range remains unchanged. In this paper, the distribution characteristics of the impinging pressure in the region of the impingement plate at different heights are clarified, which provides theoretical support for the prediction method of the impinging pressure.
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