Comparative study between turbulence models in unsteady cavitating flow with special emphasis on shock wave propagation
文献类型:期刊论文
作者 | Wang ZH(王子豪)2,3; Zhang X(张鑫)1; Wang YX(王亚兴)2,3![]() ![]() |
刊名 | Ocean Engineering
![]() |
出版日期 | 2021 |
卷号 | 240页码:1-17 |
关键词 | Cavitation Shock wave LES DES RANS Vortex structure |
ISSN号 | 0029-8018 |
产权排序 | 1 |
英文摘要 | The generation and propagation of shock waves are important sources of cavitation instability and material damage. This paper describes an evaluation of the predictive ability of different turbulence models in a compressible cavitation flow for shock wave propagation. The Schnerr–Sauer cavitation model is used to model cavitation and the volume of fluid method is used to capture the water/vapor interface. The pressure pulsations and cavity evolution given by numerical simulations and experimental results are compared to evaluate the correctness of the numerical method and the prediction accuracy of different turbulence models. The propagation mechanism of the shock wave, the evolution of vortex structures, and the temporal and spatial distribution characteristics of the cavitating flow are analyzed. The results show that the results predicted by the large-eddy simulation (LES) model are in good agreement with the experimental results. The shock wave is caused by a pressure wave that is generated by the collapse of the previously detached cloud cavity. This pressure wave hits the trailing edge of the cavity, thus inhibiting the development of the cavity and delaying the period of the cavity. In the process of shock wave propagation, the peak pressure and the peak lift (drag) coefficient appear at the same time. The propagation of the shock wave strongly disturbs the motion of the vortices, causing the large-scale vortex structure on the trailing edge of the hydrofoil to be depressed and the stable vortex on the hydrofoil to lift. The vortex stretching term and vortex dilatation term dominate the transmission process of the eddy current, and the vortex dilatation term is the most important in the process of shock wave propagation. The pressure fluctuations in the evolution of the cavity lead to changes in the statistical structure of the velocity field. Moreover, the anisotropy of velocity fluctuations in the cloud-cavity region is higher than that in the region of the sheet cavity. The Reynolds-averaged Navier–Stokes (RANS) model underestimates the cavity volume and the pulsation characteristics of the flow field, and cannot capture the negative X-direction velocity and vortex structure changes in the shock wave propagation process. Moreover, the RANS model and detached-eddy simulation (DES) model cannot accurately predict the characteristics of the flow field near the wall, and overestimate the dominant frequency of the cavity oscillations. The LES model is better at capturing the flow field characteristics in unsteady dynamics, and reproduces the shock wave propagation process well. |
WOS关键词 | LARGE-EDDY SIMULATION ; NUMERICAL-SIMULATION ; 3-DIMENSIONAL CAVITATION ; SHEDDING DYNAMICS ; TRANSITION ; SHEET ; MECHANISM |
资助项目 | National Natural Science Foundation of China[41806122] ; State Key Laboratory of Robotics of China[2017-Z08] ; Youth Innovation Promotion Associa-tion, CAS |
WOS研究方向 | Engineering ; Oceanography |
语种 | 英语 |
WOS记录号 | WOS:000710089700003 |
资助机构 | National Natural Science Foundation of China (Grant No. 41806122) ; State Key Laboratory of Robotics of China (Grant No. 2017-Z08) ; Youth Innovation Promotion Association, CAS. |
源URL | [http://ir.sia.cn/handle/173321/29791] ![]() |
专题 | 沈阳自动化研究所_水下机器人研究室 |
通讯作者 | Wang ZH(王子豪) |
作者单位 | 1.Dalian University of Technology, Graduate School of Education, Dalian, 116024, China 2.Institutes of Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang, 110016, China 3.State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, 110016, China |
推荐引用方式 GB/T 7714 | Wang ZH,Zhang X,Wang YX,et al. Comparative study between turbulence models in unsteady cavitating flow with special emphasis on shock wave propagation[J]. Ocean Engineering,2021,240:1-17. |
APA | Wang ZH,Zhang X,Wang YX,&Liu JF.(2021).Comparative study between turbulence models in unsteady cavitating flow with special emphasis on shock wave propagation.Ocean Engineering,240,1-17. |
MLA | Wang ZH,et al."Comparative study between turbulence models in unsteady cavitating flow with special emphasis on shock wave propagation".Ocean Engineering 240(2021):1-17. |
入库方式: OAI收割
来源:沈阳自动化研究所
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。