Investigation of the unsteady motion and formation mechanism of intake vortexes

3rd International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Ye, Fei^1 ; Zhang, Jing^2 ; Kong, Bo^3

North China University of Water Conservancy and Electric Power, Zhengzhou

450011, China^1

Yellow River Conservancy Commission, Ministry of Water Resources, China^2

Xi'An University of Technology, North China University of Water Conservancy and Electric Power, Zhengzhou

450011, China^3

关键词: Dormant period;    Experimental correlation;    Flow distribution;    Formation mechanism;    Physical model test;    Surface fluctuations;    Turbulent cascade;    Unsteady motion;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/61/1/012040/pdf
DOI  :  10.1088/1755-1315/61/1/012040

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The unsteady motion and formation mechanism of the intake vortexes are studied by numerical simulations, covering the flow distribution, vortex form, influencing factors, and others. Based on the physical model test, the large eddy simulation (LES) is used in the 3-D simulation of the intake flow. The occurrence of intake vortex presents a coherent characteristic of "dormant period" and "active period", which is approximately consistent with that of the surface fluctuation. According to the turbulent cascade theory, the process of energy balance of the intake vortex is studied. The simulation results compare favorably with that from experimental correlations.