涡扇发动机宽带降噪金属泡沫衬套的评价

IF 1.3 4区 医学 Q3 AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY
Esmeralda Sanchez-Torres, B. Sharma, D. Sutliff, Aikaterini Stylianides, Jake Puppo, Denver Schaffarzick, Michael Jones
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引用次数: 0

摘要

先前的研究表明,开孔金属泡沫衬垫有可能提供大量的飞机降噪效益。我们最近的研究结果表明,对其进行均匀压缩可以进一步提高其法向吸声性能;这种压缩减小了它们的有效孔径,增加了热粘性损失。此外,它们的性能可以通过堆叠具有不同压缩程度的泡沫和创建一个逐步有效的相对密度梯度来优化。在这里,我们展示了我们最近的实验结果,使用高级噪声控制风扇(ANCF)评估了这种阶梯梯度金属泡沫衬垫的衰减性能。在巴黎圣母院涡轮机械实验室的ANCF试验台上,制作并测试了两种不同阶梯配置的衬管轴。Farfield数据收集时,尾管阀芯安装在进尾位置。在本文中,我们将两种测试条件下的衰减性能与使用硬壁基线配置获得的测量结果进行了比较。我们的研究结果表明,阶梯式金属泡沫结构可以为飞机降噪应用提供强大的声学性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of metal foam liners for broadband noise reduction of turbofan engines
Previous research shows that open-celled metal foam liners have the potential to provide substantial aircraft noise reduction benefits. Our recent results show that their normal incidence sound absorption performance can be further improved by compressing them uniformly; this compression reduces their effective pore size and increases the thermoviscous losses. Further, their performance may be optimized by stacking foams with varying degrees of compression and creating a step-wise effective relative density gradient. Here, we present the results from our recent experiments, evaluating the attenuation performance of such a step-wise gradient metal foam liner using the Advanced Noise Control Fan (ANCF). Liner spools with two different step-wise configurations were fabricated and tested using the ANCF test rig at the Notre Dame Turbomachinery Laboratory. Farfield data was gathered with the liner spool mounted at the inlet and aft locations. In this paper, we present our results comparing the attenuation performance under both test conditions as compared to measurements obtained using a hard wall baseline configuration. Our results show that step-wise metal foam configurations can provide robust acoustical performance for aircraft noise reduction applications.
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来源期刊
Noise & Health
Noise & Health AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY-PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH
CiteScore
2.10
自引率
14.30%
发文量
27
审稿时长
6-12 weeks
期刊介绍: Noise and Health is the only International Journal devoted to research on all aspects of noise and its effects on human health. An inter-disciplinary journal for all professions concerned with auditory and non-auditory effects of occupational, environmental, and leisure noise. It aims to provide a forum for presentation of novel research material on a broad range of topics associated with noise pollution, its control and its detrimental effects on hearing and health. It will cover issues from basic experimental science through clinical evaluation and management, technical aspects of noise reduction systems and solutions to environmental issues relating to social and public health policy.
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