Development and Validation of a Small-Scale Anechoic Wind Tunnel
Development and Validation of a Small-Scale Anechoic Wind Tunnel
复制标题
小型消声风洞的开发和验证
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
J. Reichl
中科院分区：
文献类型：
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作者：
D. Leclercq;C. Doolan;J. Reichl
经过半个多世纪的激烈活动和复杂数值模式的长足发展，气动声学研究仍然在很大程度上依赖实验方法。实验对于为基本测试用例提供参考数据、理解高度复杂和相互作用的现象以及验证数值模拟是必不可少的。在阿德莱德大学，机械工程学院正在对其小型风洞进行升级和优化，以支持其日益增长的空气声学研究活动。2007年开始的一项实验方案需要一个安静的75x300mm2矩形截面射流，最大流速为30m/S，在频率高于200赫兹的密闭空间中是无回声的。本文简要介绍了风洞的升级改造过程，包括送风系统、气流处理和射流截面。此外，通过一系列验证实验对风洞的流动特性和声学性能进行了评估，并根据初步设计目标给出了主要结果。文中还给出了一个圆柱体在横流中的简单实验结果，并将初步结果与半经验模型进行了比较，以验证该风洞的性能。最后，对下一步在风洞中开展的研究工作进行了简要的概述。
After more than half a century of intense activity and the considerable development of complex numerical models, aeroacoustic research still relies heavily on experimental approaches. Experiments are essential to provide reference data for fundamental test cases, to understand highly complex and interacting phenomena, and to validate numerical simulations. At the University of Adelaide, the School of Mechanical Engineering is undertaking the upgrade and optimisation of its small-scale wind tunnel to support its increasing research activity in aeroacoustics. An experimental programme to start in 2007 requires a quiet 75 x 300 mm 2 rectangular cross-section jet with a maximum flow speed of 30 m/s, in an enclosure that is anechoic at frequencies above 200 Hz. This paper gives a brief outline of the process followed to upgrade the wind-tunnel, including the air supply system, flow treatment and jet cross-section. Additionally, the flow properties and acoustic performance of the wind tunnel are assessed through a series of validation experiments, and the main results are presented here against the initial design objectives. The results of a simple experiment consisting of a cylinder in cross-flow are also presented, and initial results are compared with a semiempirical model to demonstrate the performance of the wind tunnel. Finally, a brief outline of the subsequent research work to be carried out in the wind tunnel is given.