| 方管横向射流流动特性的DPIV实验研究 |
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| 引用本文： | 吴海玲,陈听宽,罗毓珊,宫武旗. 方管横向射流流动特性的DPIV实验研究[J]. 化工学报, 2003, 54(2): 250-254 |
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| 作者姓名： | 吴海玲 陈听宽 罗毓珊 宫武旗 |
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| 作者单位： | 西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049;西安交通大学能源与动力工程学院,陕西,西安,710049 |
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| 摘 要： | 引 言横向射流现象广泛存在于各种工程领域 ,如自然河道中工业生活废水排放口处污染物扩散过程 ,燃气轮机叶片及燃烧室气膜冷却过程等 .早期的实验研究以Ｋａｍｏｔａｎｉ等[1] 为代表 ,主要致力于射流轨迹及影响范围等宏观特性的研究 .自 2 0世纪 80年代以来 ,不少研究者利用
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| 关 键 词： | 方管横向射流 数字粒子图像测速 涡系结构 |
| 文章编号： | 0438-1157(2003)02-0250-05 |
| 收稿时间： | 2001-10-12 |
| 修稿时间： | 2001-10-12 |
DPIV EXPERIMENTAL STUDY OF SQUARE JET INTO CROSSFLOW |
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| WU Hailing,CHEN Tingkuan,LUO Yushan,GONG Wuqi. DPIV EXPERIMENTAL STUDY OF SQUARE JET INTO CROSSFLOW[J]. Journal of Chemical Industry and Engineering(China), 2003, 54(2): 250-254 |
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| Authors: | WU Hailing CHEN Tingkuan LUO Yushan GONG Wuqi |
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| Abstract: | Digital particle imaging velocimetry (DPIV) was used to me as ure the transient and time-averaged flow field in the mixing region and the wak e of a square jet into crossflow at jet-to-crossflow velocity ratio (VR) o f 0.5 and 2. The phenomenon of vortex instantaneously shedding from the jet ho le was investigated, and the flow turbulence intensity was estimated. The compl ex vortical structures encountered at VR of 2 were analyzed. Compulsively o ppressed by the main flow, the jet attached to the wall at VR of 0.5, and l ifted off the wall to develope into the main flow at VR of 2. The twisted v ortices in the leeward of jet contributed to the transportation of the crossflow boundary-layer fluid into the near wake, causing intensive turbulence. Strong vortices formed near the jet hole soon broke down and dissipated, yet the weak counter-vortex pair still held in the far wake. |
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| Keywords: | sqaure jet-to-crossflow digital particle imaging velocimet ry vortical structures |
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