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首页> 外文期刊>Journal of Aircraft >High-Speed Turbofan Noise Reduction Using Foam-Metal Liner Over-the-Rotor
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High-Speed Turbofan Noise Reduction Using Foam-Metal Liner Over-the-Rotor

机译：泡沫金属衬套在转子上的高速涡轮风扇降噪

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摘要

A Williams International FJ44-3A turbofan engine was used to demonstrate the high-speed fan noise reduction potential of a foam-metal liner installed in close proximity to the fan rotor. The engine was tested in the NASA Glenn Research Center's Aeroacoustic Propulsion Laboratory. Two foam-metal liner designs were tested and compared to the hardwall baseline. Traditional single degree-of-freedom liner designs were also evaluated to provide a comparison to the state-of-the art design. This report presents the test setup and documents the test conditions. Far-field acoustic levels and limited engine performance results are also presented. The results show that the foam-metal liner achieved up to 5 dB of attenuation in the forward-quadrant radiated-acoustic power levels, which is equivalent to the traditional single degree-of-freedom liner design. Modest changes in engine performance were noted.
机译：使用威廉姆斯国际公司的FJ44-3A涡轮风扇发动机来演示安装在紧邻风扇转子的泡沫金属衬里的高速风扇降噪潜力。该发动机已在NASA格伦研究中心的航空声学推进实验室进行了测试。测试了两种泡沫金属衬里设计，并将其与硬墙基线进行了比较。还对传统的单自由度衬管设计进行了评估，以提供与最新设计的比较。该报告介绍了测试设置并记录了测试条件。还介绍了远场声级和有限的发动机性能结果。结果表明，泡沫金属衬里在前象限辐射声功率级中可实现高达5 dB的衰减，这等效于传统的单自由度衬里设计。注意到发动机性能的适度变化。

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  • 来源
    《Journal of Aircraft》 |2013年第5期|1491-1503|共13页
  • 作者

    Daniel L. Sutliff; Michael G. Jones; Thomas C. Hartley;

  • 作者单位

    Aerospace Engineer, Acoustics Branch. NASA John H. Glenn Research Center at Lewis Field, Cleveland, Ohio 44135;

    Senior Research Scientist, Research and Technology Directorate, Structural Acoustics Branch. NASA Langley Research Center, Hampton, Virgina 23681;

    Engineering Specialist, Compression Team, 2280 West Maple Road. Williams International, Walled Lake, Michigan 48390;

  • 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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