CAJ | 학술논문

在矩形翼的侧面粘贴一个小矩形辅翼,构成一种新型矩形翼纵向涡发生器,称为组合翼.在压力损失相等的条件下,通过实验比较了矩形通道内组合翼与原始矩形翼纵向涡发生器的流动与换热特性.结果表明:对于原始矩形翼,其最佳攻角为45°;与矩形翼相比,组合翼的换热明显增强,且阻力系数减小,尤其当辅翼布置在矩形翼的上游时换热增强与阻力系数减小效果更加明显;研究范围内,辅翼攻角为30°时的流动与传热综合效果最佳.
재구형익적측면점첩일개소구형보익,구성일충신형구형익종향와발생기,칭위조합익.재압력손실상등적조건하,통과실험비교료구형통도내조합익여원시구형익종향와발생기적류동여환열특성.결과표명:대우원시구형익,기최가공각위45°;여구형익상비,조합익적환열명현증강,차조력계수감소,우기당보익포치재구형익적상유시환열증강여조력계수감소효과경가명현;연구범위내,보익공각위30°시적류동여전열종합효과최가.
With a small rectangular auxiliary wing being affixed at one side of the rectangular wing, called a combination wing, a new type of rectangular-wing longitudinal vortex generator is formed. Under the condition of the pressure loss being identical, the flow and heat exchange characteristics of the combination-wing longitudinal vortex generator and the original rectangular wing one in the rectangular passage were compared through experiments. The test results show that for the original rectangular wing, the optimum attack angle is 45 degrees. Compared with the rectangular wing, the combination one has a heat exchange conspicuously intensified with a reduced resistance coefficient. Especially, when the auxiliary wing is installed at the upstream of the rectangular wing, there emerges a more conspicuous effectiveness in intensifying the heat exchange and reducing the resistance coefficient. In the range of the present study, the flow and heat exchange effectiveness will be optimum when the attack angle of the auxiliary wing is set at 30 degrees.