• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Aircraft >Scaled Demonstration of Fluid Insert Noise Reduction for Tactical Fighter Aircraft Engines
【24h】

Scaled Demonstration of Fluid Insert Noise Reduction for Tactical Fighter Aircraft Engines

机译：战术战斗机发动机流体插入件降噪的规模化演示

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper summarizes a university-industry cooperative project to develop a new method of noise reduction applicable to tactical fighter aircraft engines. There is an acute need for reduction of the noise produced during takeoff in aircraft carriers. This paper describes the fluid insert noise reduction technology, also referred to as "distributed blowing." The method involves injection of air through the divergent wall of a converging-diverging nozzle to generate fluid inserts. Substantial noise reductions in small-scale experiments have been achieved for mixing noise in the maximumnoise emission direction and in broadband shock-associated noise. This paper describes the extension of the methodology to moderate-scale experiments conducted in industry. Changes to the original small-scale design for use in the industry-scale model experiments are described. The experiments were conducted in the GE Aviation Cell 41 Laboratory, and noise reductions were achieved that were very similar to those obtained in the small-scale experiments. Changes to the operating parameters produced noise reductions that in some cases exceeded comparable small-scale results. Scaling the moderate-scale experiments to a full-scale aircraft produces reductions in the A-weighted spectral peak that exceed 7 dB in the direction of maximum noise emission.
机译：本文总结了一个大学与工业界的合作项目，以开发一种适用于战术战斗机发动机的降噪新方法。迫切需要减少航空母舰起飞时产生的噪声。本文介绍了流体嵌件降噪技术，也称为“分布式吹气”。该方法包括通过会聚-扩张喷嘴的扩张壁注入空气以产生流体插入物。在最大噪声发射方向和宽带冲击相关噪声混合噪声的小规模实验中，已经实现了相当大的噪声降低。本文介绍了该方法在工业领域进行的中等规模实验的扩展。描述了对用于工业规模模型实验的原始小规模设计的更改。实验是在GE Aviation Cell 41实验室进行的，降噪效果与小规模实验非常相似。操作参数的变化产生的噪声降低在某些情况下超过了可比的小规模结果。将中等规模的实验扩展到全尺寸飞机后，在最大噪声发射方向上，A加权谱峰的减少量将超过7 dB。

著录项

  • 来源
    《Journal of Aircraft》 |2019年第5期|1935-1941|共7页
  • 作者

    McLaughlin Dennis K.; Morris Philip J.; Martens Steven;

  • 作者单位

    Penn State Univ Aerosp Engn 230A Hammond Bldg University Pk PA 16802 USA;

    Penn State Univ Aerosp Engn 233C Hammond Bldg University Pk PA 16802 USA;

    GE Aviat Evendale OH 45215 USA|Off Naval Res Code 35 875 N Randolph St Arlington VA 22203 USA;

  • 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
  • 中图分类
  • 关键词

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