| 翼梢涡风洞研究中的摆动问题 |
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| 引用本文： | 张洪军,苏中地,Y Zhou.翼梢涡风洞研究中的摆动问题[J].中国计量学院学报,2003,14(4):245-250. |
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| 作者姓名： | 张洪军 苏中地 Y Zhou |
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| 作者单位： | 1. 中国计量学院,计量技术工程学院,浙江,杭州,310018
2. 香港理工大学,机械工程系,香港 |
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| 基金项目： | 香港理工大学研究基金资助项目(No.G-T408) |
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| 摘 要： | 采用激光粒子成像速度仪(PIV)对一矩形机翼(NACA0012)模型所产生的翼梢涡进行了风洞测试研究.测量位置为机翼近场尾迹,即x/c=3垂直于流动方向的截面,这里x为机翼后缘和测量截面之间的距离,c是机翼弦长.实验中基于弦长的雷诺数范围在3.4×104～26.6×104,通过分析所测得的涡量、切向速度和环量等,发现翼梢涡的摆动幅度与流过机翼上流体是否发生边界层分离有直接关系.
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| 关 键 词： | 翼梢涡 摆动 激光粒子成像速度仪 |
| 文章编号： | 1004-1540(2003)04-0245-06 |
Wandering problem in the wind tunnel studies of wing-tip vortices |
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| Y Zhou.Wandering problem in the wind tunnel studies of wing-tip vortices[J].Journal of China Jiliang University,2003,14(4):245-250. |
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| Authors: | Y Zhou |
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| Abstract: | Tip vortices generated from a rectangular half-span wing model (NACA 0012) have been experimentally investigated. A particle imaged velocimeter (PIV) was used to measure both qualitatively and quantitatively the velocity field in a plane normal to the flow at x/c= 3, where x is the downstream distance from the trailing edge of the wing model and c is the chord length. The Reynolds number, Rec, based on the chord length of the wing, ranges between 3. 4×104 and 26. 6×104. The vorticity, tangential velocity, and circulation of the tip vortices are examined in detail. It has been found that the scattering degree of the tip-vortex wandering is closely associated with flow separation on the wing surface. |
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| Keywords: | wing-tip vortex wandering Particle Imaged Velocimeter |
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