| 受限空间内斜向冲击凹柱面流场结构试验 |
| |
| 引用本文： | 毛军逵,缪国君,刘震雄.受限空间内斜向冲击凹柱面流场结构试验[J].航空动力学报,2010,25(1):11-17. |
| |
| 作者姓名： | 毛军逵 缪国君 刘震雄 |
| |
| 作者单位： | 1. 南京航空航天大学,能源与动力学院,南京,210016
2. 民航上海中等专业学校,民航工程系,上海,200232 |
| |
| 基金项目： | 航空推进技术研制计划项目 |
| |
| 摘 要： | 以冲击旋流强化换热为研究背景,通过粒子示踪的流场显示技术,对受限空间内斜向冲击凹柱面的流场结构开展了试验研究.通过改变冲击雷诺数、冲击角度、相对冲击间距(冲击间距和冲击孔直径之比)以及相对曲率(冲击孔直径同凹面靶板直径之比)等参数,分析了受限空间中,斜向冲击曲率表面后产生的涡系结构及其发展和变化规律.流场显现结果表明:随冲击雷诺数的增加,在冲击滞止区域两侧都能形成稳定的旋流结构,并且在受限空间的角部,进一步形成了诱导涡.试验中发现随着冲击雷诺数的增加,冲击气流与壁面分离处对应的圆心角增大,分离推迟;随着相对冲击间距值的增加,气流与壁面分离处对应的圆心角越来越大,相对于受限空间的大小,诱导涡的范围越来越小.由于冲击角度的影响,冲击射流在滞止区域左侧射流(相对冲击角度较小)与壁面分离比在右侧(相对冲击角度较大)提前,同时更容易产生旋流.
|
| 关 键 词： | 斜向冲击 凹柱面 流场显示 受限空间 |
| 收稿时间： | 2008/12/29 0:00:00 |
| 修稿时间： | 3/2/2009 12:00:00 AM |
Experimental study of the flow structures of the concave surface with inclined impingement in limited space |
| |
| MAO Jun-kui,MIU Guo-jun and LIU Zhen-xiong.Experimental study of the flow structures of the concave surface with inclined impingement in limited space[J].Journal of Aerospace Power,2010,25(1):11-17. |
| |
| Authors: | MAO Jun-kui MIU Guo-jun and LIU Zhen-xiong |
| |
| Affiliation: | College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Department of Civil Aviation Engineering, Shanghai Vocational School of Civil Aviation Administration of China, Shanghai 200232, China |
| |
| Abstract: | Smoke wire flow visualization was used to investigate the characteristics of the flow structures of a round jet inclined impingement on the concave surface in limited space. Reynolds number of impingement, inclined jet angle, the ratio of the jet distance to the diameter of the jet hole and the relative curvature (the ratio of the diameter of jet hole to the diameter of concave surface) were changed to study the rules of flow structures varying with these parameters. At the same time, the developing and disappearing phenomena of the induced vortex were analyzed. All the experimental results show that, around the stagnation region, it can form swirl structure and generate vortex because of inclined jet and curvature of target concave. The central angle of the impingement fluid separated from the target surface became larger with the increase of jet Reynolds. And the separating angle also increased with the increasing ratio of the jet distance to the diameter of the jet hole, while the range of induced vortex became smaller. It was also found in experiments that, because of the influence of the inclined impingement's angle, it is easier to generate vortex at the left of the stagnation region where the relative jet angle is smaller. |
| |
| Keywords: | inclined impingement concave surface flow visualization limited space |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《航空动力学报》浏览原始摘要信息 |
|
点击此处可从《航空动力学报》下载全文 |
|
