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首页> 外文期刊>Aerospace science and technology >Supersonic inlet buzz detection using pressure measurement on wind tunnel wall
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Supersonic inlet buzz detection using pressure measurement on wind tunnel wall

机译：在风洞壁上进行压力测量的超音速进气嗡嗡声检测

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摘要

Feasibility of an innovative buzz detection technique through measuring the static pressure outside a mixed-compression supersonic inlet is studied. The buzz is an instability phenomenon that occurs almost in all supersonic inlets. During the buzz, shock oscillation along with pressure and mass flow fluctuations affects the performance characteristics of the inlet. The main objective of this paper is to introduce a simple and easy-to-implement method for investigation of the buzz phenomenon in a supersonic inlet. The experimental data for far field-based are compared with those of the model-based one at free stream Mach numbers of 1.8, 2.0, and 2.2 and at zero degrees angle of attack for a mixed-compression inlet. The results show that this technique can measure exact value of buzz frequency as well as its onset. The present method uses pressure data obtained from the wind-tunnel wall instead of measuring the pressure inside or on the model surfaces which in most cases is very hard. However, to sense flow oscillations, caused by the buzz onset the sensors on the wind-tunnel wall must be located downstream of the point where the oblique shock from the spike impinges on the tunnel wall. The location of the measurement point as well as the distance between the sensor and the origin of the shock wave system are very important. (C) 2019 Elsevier Masson SAS. All rights reserved.
机译：通过测量混合压缩超音速入口外部的静压，研究了一种创新的蜂鸣检测技术的可行性。嗡嗡声是一种不稳定现象，几乎在所有超音速入口中都会发生。在嗡嗡声期间，冲击振荡以及压力和质量流量波动会影响入口的性能特征。本文的主要目的是介绍一种简单且易于实现的方法，用于研究超音速入口中的嗡嗡声现象。将基于远场的实验数据与基于模型的实验数据在自由流马赫数分别为1.8、2.0和2.2以及零混合攻角的零迎角下进行了比较。结果表明，该技术可以测量蜂鸣频率的准确值及其开始时间。本方法使用从风洞壁获得的压力数据，而不是测量在大多数情况下非常困难的模型表面内部或表面上的压力。但是，要感测由蜂鸣声引起的流量振荡，风洞壁上的传感器必须位于尖峰产生的倾斜冲击撞击到隧道壁的点的下游。测量点的位置以及传感器与冲击波系统起点之间的距离非常重要。 （C）2019 Elsevier Masson SAS。版权所有。

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  • 来源
    《Aerospace science and technology》 |2019年第3期|782-793|共12页
  • 作者

    Farahani Mohammad; Daliri Abbas; Younsi Javad Sepahi;

  • 作者单位

    Sharif Univ Technol, Dept Aerosp Engn, POB 11365-8639, Tehran 145888, Iran;

    Ferdowsi Univ Mashhad, Dept Mech Engn, POB 91775-1111, Mashhad 91779, Razavi Khorasan, Iran;

    Ferdowsi Univ Mashhad, Dept Mech Engn, POB 91775-1111, Mashhad 91779, Razavi Khorasan, Iran;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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