低速风洞阵风发生器实验研究与分析

屈晓力; 刘琴; 朱博; 聂旭涛; 王超

doi:10.11729/syltlx20200114

低速风洞阵风发生器实验研究与分析

doi: 10.11729/syltlx20200114

屈晓力^{1, 2,},
刘琴^2, ,,
朱博²,
聂旭涛²,
王超²

1.
中国空气动力研究与发展中心空气动力学国家重点实验室，四川绵阳　621000
2.
中国空气动力研究与发展中心设备设计与测试技术研究所，四川绵阳　621000

详细信息

作者简介:
屈晓力：（1983-），男，四川绵阳人，硕士，副研究员。研究方向：风洞气动设计及试验研究。通信地址：四川省绵阳市涪城区二环路南段6号（621000）。E-mail：qxl@cardc.cn

通讯作者:
E-mail：30942667@qq.com

中图分类号: V211.753
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- 被引次数: 0
出版历程
- 收稿日期: 2020-10-12
- 修回日期: 2021-01-20
- 网络出版日期: 2021-11-15
- 刊出日期: 2021-11-05

Experimental research and analysis of gust generator for low speed wind tunnel

QU Xiaoli^{1, 2
,},
LIU Qin^{2
, ,},
ZHU Bo²,
NIE Xutao²,
WANG Chao²

1.
State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang Sichuan　621000, China
2.
Facility Design and Instrumentation Institute, China Aerodynamics Research and Development Center, Mianyang Sichuan　621000, China

摘要

摘要: 阵风发生器是阵风响应风洞试验的关键设备。针对叶片式阵风发生器的运行特点，通过简化的定常涡升理论，推导出阵风发生器下游流场Y向风速的计算公式。以0.55 m×0.4 m低速风洞（声学引导风洞）为实验平台，系统地研究了阵风发生器的设计参数（叶片弦长、数目、间距）和运行参数（叶片摆幅和摆动频率、来流速度）对阵风流场风速极值的影响。研究表明：推导的简化公式能够解释阵风发生器各设计和运行参数变化后，其下游流场Y向风速的变化机制，可在阵风发生器设计时对其产生的阵风流场进行简单预估；从增大阵风发生器下游流场Y向速度极值的角度出发，增加叶片数目比增大叶片弦长更能增大Y向速度；在叶片失速前，增大叶片摆幅比增大叶片摆动频率更能增大Y向速度；采用多组叶片的阵风发生器，叶片间距不能太小，否则会导致等效升力系数下降，当叶片间距为1.2倍弦长时，能够获得最大的Y向速度极值。本文研究工作可为其他风洞的阵风发生器设计提供参考。
- 低速风洞 /
- 阵风响应 /
- 叶片式 /
- 发生器 /
- 实验研究
Abstract: The gust generator is the key equipment for the wind tunnel test in response to the gust. According to the operating characteristics of the oscillating vanes gust generator, a simplified steady vortex theory is used to deduce the calculation formula of the Y-direction wind speed in the downstream flow field of the gust generator. With the experimental researches done in the 0.55 m × 0.4 m low-speed wind tunnel (a pilot acoustic wind tunnel), the influences on the extreme wind speed of the gust flow field were systematically studied by changing the design parameters of the gust generator (vane chord length, number, spacing) and operating parameters (vane swing amplitude, swing frequency, incoming flow velocity). The research shows that the simplified formula derived in this paper can explain the changing mechanism of the Y-direction wind speed in the downstream flow field after the design and operating parameters of the gust generator are changed. The gust flow field generated by the gust generator can be simply analyzed during the design of the gust generator. To increase the Y-speed extreme value of the downstream flow field of the gust generator, increasing the number of vanes has an advantage over increasing the vanes chord length. Before the vanes stall, the larger Y-speed extreme value can be obtained by increasing the vanes swing speed rather than by increasing the vanes swing frequency. The spacing of the vanes for the gust generator should not be too small, otherwise the equivalent lift coefficient of the vanes would decrease. When the vanes spacing is 1.2 times the chord length, the maximum Y-direction wind speed can be obtained. This research can provide reference for the design of gust generators in other wind tunnels.
- low speed wind tunnel /
- gust response /
- oscillating vanes /
- generator /
- experimental research

HTML全文

图 1 0.55 m×0.4 m低速风洞

Figure 1. 0.55 m×0.4 m low speed wind tunnel

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图 2 阵风发生器实验件

Figure 2. Gust generator test system

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图 3 阵风发生器下游流动简化模型

Figure 3. Simple theoretical aerodynamic model of Gust generator

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图 4 热线风速仪

Figure 4. Hot wire anemometer

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图 5 热线探针安装照片

Figure 5. Photo of hot wire probe

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图 6 不同叶片弦长时风速极值

Figure 6. Wind speed amplitude for different blade chord lengths of the gust generator

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图 7 不同叶片间距时风速极值

Figure 7. Wind speed amplitude for different blade spacing of the gust generator

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图 8 不同叶片数目时风速极值

Figure 8. Wind speed amplitude for different numbers of blades of the gust generator

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图 9 不同摆动频率时风速极值

Figure 9. Wind speed amplitude for different oscillation frequencies of the gust generator

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图 10 不同叶片摆幅时风速极值

Figure 10. Wind speed amplitude for different blade amplitudes of the gust generator

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图 11 不同来流速度下风速极值

Figure 11. Wind speed amplitude for different freestream speed

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