摘要
在低速风洞中采用微型叶片作为涡流发生器对某S弯进气道进行流动控制,通过风洞试验研究了微型叶片的不同参数(包括叶片高度、轴向位置、安装组数)对进气道气动特性的影响。试验测量了来流风速V=60m/s、模型攻角α=8°的条件下有/无微型导流叶片时进气道出口截面的总压和静压分布,并由此计算得到进气道出口截面的总压恢复系数和畸变指数。试验结果表明:微型叶片的不同参数(包括叶片高度、轴向位置、安装组数)对进气道流动有明显影响;通过在进气道第一弯道处安装合适高度和组数的微型叶片涡发生器,可以明显改善进气道出口流动;在现有的试验条件下,叶片高度h/Ri=0.02、轴向位置Xvg/Ri=1、组数Nvg=8是相对较优的流动控制方案,主要表现为:与未安装微型叶片相比,进气道流量系数φ=0.8时出口畸变指数降低了0.051,总压恢复系数提高了0.007。
Micro-vanes as vortex generators are utilized to improve the flow in an S-shaped inlet in low-speed wind tunnel, and experimental investigation is carried out to study the effect of different parameters of micro-vanes including height, axial location and number of pairs on the aerodynamic performance of inlet. The total pressure and static pressure at the duct exit with and without micro-vanes are measured through experiment with free-stream wind speed V=60m/s and the angle of attack of inlet α=8°, and the total pressure recovery and distortion DC60 are calculated. Experimental results show that the different parameters of micro-vanes including height, axial location and number of pairs have apparent effect on the inlet duct flow. Through an arrangement of micro-vanes configuration with appropriately chosen height and number of pairs at the first curve of inlet duct, theflow quality at the duct exit can be improved obviously. Under the current test cases, the height of micro-vanes h/Ri=0.02, axial location Xvg/Ri=1 and number of pairs Nvg=8 is the optimal flow control configuration relatively, which decreases the distortion by 0.051 and increases the total pressure recovery by 0.007 under flux coefficient φ=0.8 comparing with the test case of without micro-vanes.
出处
《应用力学学报》
CAS
CSCD
北大核心
2014年第2期201-205,307-308,共5页
Chinese Journal of Applied Mechanics
