亚尺度双转子结构间冲击流动的实验研究

IF 1.3 Q3 ENGINEERING, MULTIDISCIPLINARY International Journal of Engineering and Technology Innovation Pub Date : 2020-07-01 DOI:10.46604/ijeti.2020.4933
A. Mehrabi, A. Davari
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引用次数: 0

摘要

摘要基于悬停飞行时的压力和推力测量,建立了双旋翼直升机喷泉流在地面效应下的亚比例模型。首先,根据非重叠转子流场特性,总结了形成喷泉流的流型及试验要求;然后,介绍了多功能试验台的设计。然后,得到喷泉水流压力和流速图。最后,利用簇绒技术来可视化模特身体下方和地面上的喷泉流。此外,通过推力测量验证了喷泉流存在假设的正确性,以及喷泉流对双转子效率的影响。结果表明,在双转子配置下,由于喷泉流量大于单转子配置时,地面效应提高了升力。
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Experimental Investigation of Impacting Flow between a Sub-Scale Twin-Rotor Configuration
Abstract The objective of this paper is to conduct the experiments for a sub-scale model of a twin-rotor helicopter’s fountain flow in the ground effect based on the pressure and thrust measurements in the hover flight. Firstly, the flow pattern, which leads to form the fountain flow and tests’ requirements, is summarized according to the non-overlapping rotors’ flow field characteristics. Then, a multipurpose test stand design is introduced. After that, the fountain flow pressure and velocity graphs are obtained. Finally, the tuft technique is used to visualize the fountain flow below the model’s body and on the ground. In addition, confirmation of the fountain flow existence hypothesis is verified by thrust measurements and its influence on the efficiency of the twin-rotor. The result indicates that in the twin-rotor configuration, ground effect improves the lift force due to the fact that the fountain flow is more than its value in the single-rotor configuration.
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来源期刊
CiteScore
2.80
自引率
0.00%
发文量
18
审稿时长
12 weeks
期刊介绍: The IJETI journal focus on the field of engineering and technology Innovation. And it publishes original papers including but not limited to the following fields: Automation Engineering Civil Engineering Control Engineering Electric Engineering Electronic Engineering Green Technology Information Engineering Mechanical Engineering Material Engineering Mechatronics and Robotics Engineering Nanotechnology Optic Engineering Sport Science and Technology Innovation Management Other Engineering and Technology Related Topics.
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