• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>AIAA/CEAS aeroacoustics conference >Facility Design and Shock-Cell Noise Investigation on a Supersonic Coaxial Jet
【24h】

Facility Design and Shock-Cell Noise Investigation on a Supersonic Coaxial Jet

机译：超音速同轴射流的设施设计与抗冲击性噪声调查

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Shock-cell noise is an aeroacoustic phenomenon that occurs in aeronautic engines when the nozzle is not adapted to the atmospheric pressure. In civil aircraft at cruise the secondary flow is often supersonic, thus the onset of a shock-cells system in the wake and broadband shock-associated noise as a consequence. This paper aims to describe the design process of the new facility FAST (Free jet AeroacouSTic laboratory) at the von Karman Institute, built with the aim to investigate experimentally the shock-cell noise phenomenon on a dual stream jet. The rig consists of a coaxial open jet with supersonic capability for both primary and secondary flow. A coaxial silencer is used to remove the spurious noise coming from the feeding lines. The design has been validated by the use of CFD simulations. Preliminary experimental test campaigns with the single and coaxial supersonic jet are presented. Fine scale PIV coupled with a microphone array in the far field have been compared with analogous research in this field.
机译：当喷嘴不适应大气压时，冲击细胞噪声是在航空发动机中发生的空气声现象。在巡航的民用飞机上，二次流动通常是超音速，因此由于后果而在唤醒和宽带冲击相关噪声中发出了冲击单元系统。本文旨在描述Von Karman Institute的新设施快速（自由喷气机气道路）的设计过程，其目的是在实验上调查双流射流上的冲击池噪声现象。钻机由同轴开放式喷射器组成，具有超声波能力，用于初级和二次流动。同轴消音器用于消除来自馈线的杂散噪声。使用CFD模拟已验证设计。提出了具有单轴和同轴超音速喷射的初步实验测试运动。与该领域的类似研究进行了比较了与远场中的麦克风阵列耦合的精细量级PIV。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号