Influence of combinational distortion generator geometrical parameters on the steady and dynamic components of the total pressure distortion

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 : 2024-05-02 DOI:10.1177/09544100241248875

Enbo Sun, Haideng Zhang, Yun Wu, Lifu Zhang

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Abstract

To construct a method for designing a total pressure distortion generator with adjustable, steady, and dynamic components, we experimentally investigated the influences of combinational distortion generator geometrical parameters on the steady and dynamic components of the total pressure distortion based on an indraft wind tunnel. Different types of annular plates and cylindrical rods were installed upstream of a traditional baffle total pressure distortion generator; the total pressure distortion was then measured using rotatable total pressure rakes. The installation of cylindrical rods upstream of the baffle plate could maximally reduce the ratio of steady and dynamic components of total pressure distortion by 30%. Increasing the number and height of the rods, as well as the axial distance between the rod and baffle plate, were effective methods of reducing the steady components of total pressure distortion. Similarly, changing the geometrical parameters of the annular plate was also an effective method for adjusting the ratio of steady and dynamic components of total pressure distortion. The ratio of the steady and dynamic components of total pressure distortion first experienced a decrease and then increased variance law with the increase in the height and circumferential scale of the annular plate. During this procedure, the steady and dynamic components ratio of total pressure distortion could be maximally reduced by 24% and maximally increased by 20%.

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组合失真发生器几何参数对总压力失真稳定和动态分量的影响

为了构建一种设计具有可调、稳定和动态分量的总压畸变发生器的方法，我们在内流式风洞的基础上，对组合畸变发生器几何参数对总压畸变稳定和动态分量的影响进行了实验研究。在传统障板总压畸变发生器的上游安装了不同类型的环形板和圆柱形杆，然后使用可旋转的总压耙测量总压畸变。在挡板上游安装圆柱形杆可最大限度地将总压畸变的稳定分量和动态分量之比降低 30%。增加杆的数量和高度，以及杆与挡板之间的轴向距离，都是减少总压畸变稳定分量的有效方法。同样，改变环形板的几何参数也是调整总压畸变稳定分量和动态分量比率的有效方法。随着环形板高度和圆周尺度的增加，总压畸变的稳定分量和动态分量之比的方差规律先是减小，然后增大。在此过程中，总压畸变的稳定分量和动态分量比最大可减少 24%，最大可增加 20%。

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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).