| 李玉栋,杨洋,车龙,贾琦,徐大川*.基于调节片的风速剖面模拟装置实验研究[J].实验力学,2021,36(3):414~421 |
| 基于调节片的风速剖面模拟装置实验研究 |
| Experimental study of wind velocity profile simulator based on adjustment sheets |
| 投稿时间：2020-04-05 修订日期：2020-06-17 |
| DOI：10.7520/1001-4888-20-059 |
| 中文关键词: 风洞 模拟装置 调节片 风速剖面 大气边界层 环境测试仪 |
| 英文关键词:wind tunnel simulator adjustment sheet wind velocity profile atmospheric boundary layer environment tester |
| 基金项目: |
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| 摘要点击次数: 433 |
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| 中文摘要: |
| 在模拟大气边界层流动的风洞中，风速剖面模拟是关键技术之一。为了在风洞中实现大气边界层风速剖面的模拟，在风洞试验段内产生满足要求的风速剖面，本文针对一种基于调节片的风速剖面模拟装置进行了实验研究。这种基于调节片的风速剖面模拟装置在高度方向分为若干层，每层均由3片调节片组成，每片调节片按相同的规律开孔，且每层调节片均可独立控制。通过调节每层调节片的相对位置，使得每层通道的流通面积发生改变，使风洞在不同高度产生不同的阻塞度，引起气流流量的二次分配，同时在高度方向上的速度剪切，将气流的动能转化为湍流脉动，从而形成速度梯度。搭建了风速剖面模拟装置实验平台，并制作了风速剖面模拟装置试验件，使用KANOMAX公司的环境测试仪对风速剖面模拟装置下游速度分布进行测量。实验结果表明，通过改变调节片的相对位置，风速剖面模拟装置可以改变风速在竖直方向上的分布，得到线性、指数型的风速剖面。 |
| 英文摘要: |
| In the wind tunnel that can simulate the flow of atmospheric boundary layer, the wind velocity profile simulation technique is one of key techniques. In order to realize the simulation of atmospheric boundary layer in wind tunnel, experimental study of a wind velocity profile simulator based on adjustment sheets is performed. This type of wind velocity profile simulator is divided into several layers in the vertical direction. Each layer consists of three adjustment sheets, which have the same parameters of portiforium and can be controlled independently. With movement of adjustment sheets in each layer, the area of flow passage is changed, resulting in different throttling ratio in each layer. The rate of air flow is redistributed. The kinetic energy of flow will transform into turbulent fluctuation energy due to the velocity shear in the vertical direction, generating the velocity gradient. Experimental platform of the wind velocity profile simulator is constructed in CARDC, and corresponding devices are developed. The velocity distribution along the downstream of wind profile simulator is measured by the environment tester of KANOMAX. Experimental results indicate that the velocity distribution in vertical direction can be changed by the wind profile simulator through changing the positions of adjustment sheets, and different types of wind velocity profiles with linear or exponential types can be obtained. |
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