热科学学报（英文版）2001，Vol.10Issue(1)：1-6,6.
Numerical Investigation of Developing Turbulent Flow in a Helical Square Duct with Large Curvature
Numerical Investigation of Developing Turbulent Flow in a Helical Square Duct with Large Curvature
Gao Hui 1Guo Liejin1
作者信息
- 1. State Key Laboratory of Mulriphase Flow in Power Engineering, Xi' an Jiaotong University, Xi' an 710049,China
- 折叠
摘要
Abstract
A fully elliptic numerical study has been carried out to investigate the three-dimensional turbulent developing flow in a helical square duct with large curvature. A two-layer zonal model is proposed and used, in which the whole region is divided into a viscosity-affected near wall layer and a fully turbulent region. A DSM closure is applied in the former, and a one-equation model is solved in the latter. The results presented in this paper cover a Reynolds number range of (1 ～ 10) x 104. The development of flow is found to be dominated by radial pressure gradient and Dean-type secondary motion. The distribution of Reynolds stresses in fully developed flow exhibit a complex pattern of turbulence anisotropy. The development of peripherally averaged friction factor and the distribution of local friction factor in fully developed flow are given and discussed.关键词
curved pipe/developing flow/turbulence model/numerical simulationKey words
curved pipe/developing flow/turbulence model/numerical simulation分类
能源科技引用本文复制引用
Gao Hui,Guo Liejin..Numerical Investigation of Developing Turbulent Flow in a Helical Square Duct with Large Curvature [J].热科学学报（英文版）,2001,10(1):1-6,6.
