LES of Turbulent Flows Through a Butterfly Valve
Large-eddy simulation (LES) is used to analyze the wake flow characteristics around a butterfly valve. The Smagorinsky- Lilly (SML) model is used for the investigation. The turbulent fluctuations and power spectrum of the wake flow are analyzed for Re = 5.23×105 based on the mean inlet velocity and the diameter of the pipe. Four dominating frequencies corresponding to the Strouhal number equal to 0.084, 0.114, 0.152 and 0.175 are found both in the near-wall region and in the midst of the pipe. The evolution of vortices around the valve is presented to illustrate the formation of the single vortex propagating downstream.
LES backward-facing step butterfly valve flow structures
J. F. Gong P. J. Ming W. P. Zhang
College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China
国际会议
广州
英文
457-459
2011-06-30（万方平台首次上网日期，不代表论文的发表时间）