| 地面涡研究 |
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| 引用本文： | 马申义. 地面涡研究[J]. 航空学报, 1989, 10(5): 293-296 |
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| 作者姓名： | 马申义 |
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| 作者单位： | 南京航空学院 |
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| 摘 要： | The formation mechanism and the flow characteristics of the ground vortices as well as the method of eliminating ground vortices are studied in this paper. It is noted that, when air is sucked into an aircraft engine, on the ground a momentum moment is exerted on a point sink flow by a lateral wind or a reversed jet from the tail pipe, resulting in the formation of eddy stream known as ground vortices. Through an analysis of numerous experimental data it is found that the ground vortices are composed of two vortices instead of a single and concentrated free vortex.The tangitial velocity distribution curves of the ground vortex can be expressed as two independent functions: one is a directly proportional function located at the core, and the other is an inversely proportional function around the outer surrounding. The pressure distribution is also composed of two parabolic functions.In addition, a method of eliminating the ground vortices is presented, and it is of important engineering significance to eliminate the ground vortices.
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| 关 键 词： | |
| 收稿时间： | 1988-02-09; |
A STUDY OF GROUND VORTEX |
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| Nanjing Aeronautical Institute Ma Shenyi. A STUDY OF GROUND VORTEX[J]. Acta Aeronautica et Astronautica Sinica, 1989, 10(5): 293-296 |
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| Authors: | Nanjing Aeronautical Institute Ma Shenyi |
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| Affiliation: | Nanjing Aeronautical Institute Ma Shenyi |
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| Abstract: | The formation mechanism and the flow characteristics of the ground vortices as well as the method of eliminating ground vortices are studied in this paper. It is noted that, when air is sucked into an aircraft engine, on the ground a momentum moment is exerted on a point sink flow by a lateral wind or a reversed jet from the tail pipe, resulting in the formation of eddy stream known as ground vortices. Through an analysis of numerous experimental data it is found that the ground vortices are composed of two vortices instead of a single and concentrated free vortex.The tangitial velocity distribution curves of the ground vortex can be expressed as two independent functions: one is a directly proportional function located at the core, and the other is an inversely proportional function around the outer surrounding. The pressure distribution is also composed of two parabolic functions.In addition, a method of eliminating the ground vortices is presented, and it is of important engineering significance to eliminate the ground vortices. |
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| Keywords: | vertex ground vortex living height. |
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