Design and characterizing of blower wind tunnel using experimental and numerical simulation

IF 1 4区工程技术 Q3 ENGINEERING, AEROSPACE

Proceedings of the Institution of Mechanical Engineers Part G-Journal of Aerospace Engineering Pub Date : 2023-08-21 DOI:10.1177/09544100231195190

Itimad D. J. Azzawi

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Abstract

A new subsonic blower wind tunnel design has been studied both numerically and experimentally; it is also referred to as “blower” wind tunnel. This paper is initially aimed to address each sequential stage of the wind tunnel design process. Rather than applying the standard method of modelling solely the flow in the test section, a large-scale CFD model of the whole wind tunnel was employed. The loss of every constituent element was calculated and then all the losses are added up to determine the power needed for the wind tunnel operation which is used as “intake fan” boundary conditions in the CFD model. Then, flow uniformity and turbulent intensity measurements in an empty test section using a pitot static tube and hot wire anemometer (HWA) were introduced to validate the CFD results. The results showed that flow quality was significantly affected by flow conditioners (uniformity devices) (honeycomb and mesh screens) in the settling chamber and wide-angle diffuser. Investigations were also conducted to evaluate the flow deficit in the wake area behind a convex hump model using both HWA and particle image velocimetry PIV. This was additional experimental tests carried out to validate the suitability of the wind tunnel designed for aerodynamic research.

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鼓风机风洞的设计与表征，采用实验与数值模拟相结合的方法

对一种新型亚音速鼓风机风洞设计进行了数值和实验研究;它也被称为“鼓风机”风洞。本文最初的目的是解决风洞设计过程的每个顺序阶段。本文采用了全风洞的大尺度CFD模型，而不是仅对试验段的流动进行模拟。计算每个组成元素的损失，然后将所有损失相加，以确定风洞运行所需的功率，该功率在CFD模型中用作“进气风扇”边界条件。然后，利用皮托管静管和热线风速仪(HWA)在空试验段进行了流动均匀性和湍流强度测量，以验证CFD结果。结果表明:沉降室内的气流调节装置(均匀装置)(蜂窝筛和筛网)和广角扩散器对流动质量有显著影响;此外，我们还利用粒子图像测速技术(PIV)和HWA技术对凸峰模型后尾迹区域的流动亏缺进行了研究。这是额外的实验测试，以验证设计用于空气动力学研究的风洞的适用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Institution of Mechanical Engineers Part G-Journal of Aerospace Engineering 工程技术-工程：机械

CiteScore

2.40

自引率

18.20%

发文量

212

审稿时长

5.7 months

期刊介绍： The Journal of Aerospace Engineering is dedicated to the publication of high quality research in all branches of applied sciences and technology dealing with aircraft and spacecraft, and their support systems. "Our authorship is truly international and all efforts are made to ensure that each paper is presented in the best possible way and reaches a wide audience. "The Editorial Board is composed of recognized experts representing the technical communities of fifteen countries. The Board Members work in close cooperation with the editors, reviewers, and authors to achieve a consistent standard of well written and presented papers."Professor Rodrigo Martinez-Val, Universidad Politécnica de Madrid, Spain This journal is a member of the Committee on Publication Ethics (COPE).