...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aerospace science and technology >Technology approach to aero engine noise reduction
【24h】

Technology approach to aero engine noise reduction

机译：降低航空发动机噪音的技术方法

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

Transportation noise is one of the most pressing environmental problems of modern societies. Aircraft noise is second only to road traffic noise in drawing complaints from the public about noise pollution. Therefore intensive research efforts are necessary on the national levels as well as the European level to reduce the noise load around airports. The most effective and economical way to reach this goal is noise reduction at the source. The aero engines of today's transport aircraft are the dominant noise sources for most flight conditions, although airframe noise does play an important role for landing aircraft. In this paper noise reduction studies for aero engines are described in which DLR are involved. The topics discussed are low noise fan design, active noise control using wall-flush loudspeakers as secondary sources, ANC using active stators as secondary sources, ANC using flow induced secondary sources at the rotor tips, reduction of low-pressure turbine noise, and flight tests for validation of add-on noise reduction devices.
机译：运输噪声是现代社会最紧迫的环境问题之一。在引起公众对噪声污染的抱怨时，飞机噪声仅次于道路交通噪声。因此，有必要在国家层面以及欧洲层面上进行大量的研究，以减少机场周围的噪音负荷。达到此目标的最有效，最经济的方法是从源头上降低噪声。尽管机身噪声对着陆飞机起着重要作用，但当今的运输飞机的航空发动机是大多数飞行条件下的主要噪声源。在本文中，描述了涉及DLR的航空发动机降噪研究。讨论的主题包括低噪声风扇设计，使用嵌入式扬声器作为辅助源的有源噪声控制，使用有源定子作为辅助源的ANC，在转子尖端使用流量感应辅助源的ANC，降低低压涡轮机噪声以及飞行用于验证附加降噪设备的测试。

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