Air curtains for landing gear noise reduction

IF 5.8 1区工程技术 Q1 ENGINEERING, AEROSPACE Aerospace Science and Technology Pub Date : 2025-03-20 DOI:10.1016/j.ast.2025.110139

Daniel Carroll , Michael Pott-Polenske , Gareth J. Bennett

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Abstract

This paper examines the implementation of air curtain nozzles to reduce the aerodynamic noise radiated from a modified scaled LAGOON landing gear and a detailed trailing-arm Main Landing Gear representing a generic Bizjet wing mounted gear provided by Dassault Aviation and Safran Landing Systems. At approach to landing, landing gear noise is still a significant contributor to environmental noise in the vicinity of airports. Progress is being made with ambitious projects which aim to develop significantly reconfigured aircraft architectures to reduce airframe noise. The current project examines a noise abatement concept which could be retrofitted to existing landing gear configurations as an interim measure or as part of a longer term solution. Flow control in the form of “air curtain” nozzles which create a fluidic shield or virtual fairing are examined. The air curtain concept was examined as a low test-readiness-level (TRL), high-risk, high-gain technology tested in the EU funded H2020 collaborative research project: INVENTOR, InnoVative dEsign of iNstalled airframe componenTs for aircraft nOise Reduction. The nozzles operate at high pressure with rows of choked-flow sub-millimeter holes. Narrow and broadband noise attenuation was achieved, with reductions of over 7 dB measured. The air curtains were examined in DLR's AWB aeroacoustic facility in Braunschweig, Germany.

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用于降低起落架噪音的气帘

本文研究了气幕喷管的实施，以减少来自一个改进的伸缩泻湖起落架和一个详细的后臂主起落架的空气动力学噪声，主起落架代表了由达索航空和赛峰着陆系统提供的通用比捷机翼安装齿轮。在进近着陆时，起落架噪声仍然是机场附近环境噪声的重要组成部分。一些雄心勃勃的项目正在取得进展，这些项目旨在开发显著重新配置的飞机架构，以降低机身噪音。目前的项目研究了一个减少噪音的概念，可以作为临时措施或长期解决方案的一部分，对现有起落架配置进行改造。研究了“气幕”喷嘴形式的流动控制，该喷嘴可形成流体屏蔽或虚拟整流罩。在欧盟资助的H2020合作研究项目“INVENTOR”中，空气幕概念作为一种低测试准备水平（TRL）、高风险、高增益的技术进行了测试，该项目名为“用于飞机降噪的已安装机身部件的创新设计”。喷嘴在高压下工作，有成排的亚毫米节流孔。窄带和宽频带的噪声衰减达到了7 dB以上。空气幕在德国布伦瑞克的DLR AWB气动声学设施中进行了测试。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.