FLOW AND HEAT TRANSFER COMPUTATIONS IN A ROTATING SQUARE CHANNEL WITH TRANSVERSE RIBS NON-SYMMETRICALLY INSTALLED ON TWO WALLS
Numerical simulation were performed to study the effect of rib height on flow and heat transfer for radial outward flow in rotating square channels for which heat transfer data were available in the published literature. Transverse ribs of variable heights were non-symmetrically installed on the leading and trailing walls. The rib pitch was equal to the channel hydraulic diameter. The height of the ribs ranged form 1/32 to 1/10 of rib pitch. The Reynolds number (Re) and rotation number (Ro) were fixed at 5500 and 0.24, respectively. The predicted Nusselt results show that the flow and heat transfer characteristics on the two principle walls show different dependency on the rib configurations. Roughening the trailing wall with ribs or increasing the trailing wall rib heights increase the heat transfer on the leading wall, on the contrary,roughening the leading wall with ribs or increasing the leading wall rib heights does not significantly affects the heat transfer on the trailing wall. Qualitatively, these predicted trends agree with the published experimental observations. The streamlines and contours of turbulent kinetic energy are also presented to understand the dissimilarity heat transfer behavior on leading and trailing walls.
Zhi Tao Chuankai Liu Shuiting Ding Qiangguo Xu Hongwu Deng Bin Wang
National Key Lab.on Aero-engines, School of Jet Propulsion, BUAA, Beijing
国际会议
昆明
英文
351-357
2006-09-18（万方平台首次上网日期，不代表论文的发表时间）