摘要
利用PIV系统对矩形通道内布置纵向涡发生器时的二次流结构进行了测量,并与光通道的流动结构进行了比较.分析了组合翼、辅翼的布置位置和布置方式对流动结构的影响.实验结果表明,在光通道入口附近,由于地球自转作用空气产生整体旋转运动,随着流动的进行,旋涡强度减弱,最后形成多个小旋涡.与光通道相比,纵向涡发生器产生的旋涡强度及影响范围均明显增加.在距纵向涡发生器较近的地方,形成角涡,随着流动的进行,角涡逐渐消失,最后形成一个较大旋涡.组合翼产生的二次流结构与矩形翼相似,但二次流和角涡强度均增加.辅翼背风布置优于迎风布置.
The secondary flow structure in a rectangular channel mounted with or without longitudinal vortex generators were measured using PIV system. The effects of the position and arrangement of the accessory wing on the flow structure were analyzed. The experimental results suggest that near the smooth channel inlet, a vortex is generated due to the earth rotation. The strength of the vortex decreases along the streamwise direction. Finally, a vortex is broken to several vortices. The strength and range of the vortex generated by the vortex generators are obviously higher than that in the smooth chan- nel. A corner vortex is generated behind the vortex generator and gradually disappears along the streamwise direction. The secondary flow structure generated by the combined wing is similar to that by the rectangular wing. Whereas the main and corner vortices generated by the combined wing are stronger than that by the rectangular wing. The accessory wing mounted on the back face of the main wing is better than that mounted on the front face.
出处
《河北工业大学学报》
CAS
北大核心
2011年第6期59-62,共4页
Journal of Hebei University of Technology
基金
天津市应用基础及前沿技术研究计划(09JCYBJC07300)
关键词
PIV
纵向涡发生器
流场测试
流动结构
角涡
PIV
longitudinal vortex generator
flow field measurement
flow structure
comer vortex
