肋角度和出流孔位置对流动特性的影响

针对带肋和双排出流孔通道,研究了肋角度和出流孔位置对流量系数分布和总压系数分布的影响.研究的肋角度为60°,90°和120°.出流孔分别位于相邻两肋之间距前肋1/4肋距、两肋中间、距后肋1/4肋距.研究表明:不同的肋角度和出流孔位置不改变流量系数和总压系数沿流向的分布规律;流量系数随肋角度增大而增大;60°和120°肋通道中总压系数绝对值接近且小于90°肋通道巾的绝对值;两肋之间,出流孔位置靠近下游,将使流量系数增大,总压系数绝对值增大.

Effect of rib turbulator orientation and bleed hole location on flow character

The effect of rib turbulator orientation and bleed hole location on the discharge coefficient and total pressure coefficient distribution for the flow in channel with rib turbulators and double-row bleed holes have been investigated. Rib tubulator orientation angles were 60°,90° and 120°. Bleed holes locate at 1/4 rib distance downstream from front rib, the middle of rib distance, 1/4 rib distance upstream from behind rib. The results indicate that rib turbulator orientation and bleed hole location do not change the distribution of discharge coefficient and total pressure coefficient along the channel; Discharge coefficient increase with the increase of rib tubulator orientation angle; The absolute value of total pressure coefficient in the channel with 60° and 120° ribs is approximately same and less than that in passage with 90° ribs; The discharge coefficient and the absolute value of total pressure coefficient decrease while the bleed holes close to down stream between two adjacent ribs.