【作者】 邓学蓥； 柏楠； 马宝锋； 陈莹； 王延奎；

【Author】 DENG Xue-ying BO Nan MA Bao-feng CHEN Ying WANG Yan-kui (Ministry-of-Education Key Laboratory of Fluid Mechanics,Beijing University of Aeronautics and A(?)tronautics,Beijing 100083,China)

【机构】 北京航空航天大学流体力学教育部重点实验室；

【摘要】 本文利用长细比为3.0的尖拱形头部,其后为圆柱段,整体长细比为6.0的旋成体模型在北京航空航天大学流体力学研究所 D4低速风洞和西北工业大学翼型、叶栅重点实验室 NF-3风洞中进行了大攻角非对称涡绕流的 Re_D 数效应及其分区性态的实验研究,其 Re_D 数变化范围是0.6×10~5～13.3×10~5。文内首先研究和详细讨论了不同 Re_D 数下非对称涡性态的分区特性;其次,为了研究湍流分离下过临界非对称涡流动的性态及其 Re_D 数效应,本文发展了利用粘贴转捩带或转捩丝的人工转捩实验技术;在此基础上详细研究了过临界 Re_D 数下非对称涡流动的性态包括流动的确定性、头部扰动周向位置变化引起非对称涡的演化规律以及过临界区的 Re 数影响规律。更多还原

【Abstract】 In order to study the Reynolds number effects with zonal behaviors on the asymmetric vortex flow over slen- der body,the experimental investigations were carried out in D-4 Low Speed wind tunnel of BUAA and the NF-3 wind tun- nel of Northwest Polytechnic University(NPU)on a 3D pointed tangent ogive/cylinder model with f’meness ratio 6 in Reynolds numbers range 0.6×10~5-13.3×10~5 at high angle of attack.At first,the zonal behaviors of Beynolds number ef- fects on asymmetric vortices over slender body were discussed in detail and a new inception regime with down- and up-criti- cal Reynolds number is introduced,in which the vortex pattern with suberitical Beynolds number regime on one side d body and the vortex pattern with critical Reynolds number regime on the other side.Then,in order to expand the Reynolds num- ber of running wind tunnel to the post-critical range in the conventional wind tunnel,an artificial transition technique with grit strips or metal thread was developed.Based on this technique,the behaviors of asymmetric vortices at post-critical regime was studied which include its deterministic feature,the evolution and development d asymmetric vortices with the perturbation on the model nose and the Reynolds number effect in the post-critical Reynolds number range.更多还原