Numerical Investigation of Fluid Injection to Reduce Trailing-Edge Noise

减少后缘噪声的流体注入数值研究

基本信息

项目摘要

The EU Vision 2020 expects a 10dB noise reduction per aircraft operation. That is, at landing besides engine noise especially airframe noise generated by high-lift devices and landing gears has to be reduced since it is an equally significant noise source. Due to the disparity of the flow characteristics of high-lift devices, which represent a slender body, and landing gears, which consist of blunt bodies, only the noise reduction of the slender-body problem will be considered in this proposal. As a generic configuration the trailing edge of the flat plate of finite thickness is used to numerically analyze the potential to reduce the noise when an “acoustically soft” trailing edge is designed. To be more precise, the discontinuity experienced by an eddy in convecting over the edge is to be lowered to decrease the intensity of edge scattering. This reduction of the discontinuity is to be realized by injecting an additional fluid upstream of the edge to generate a near-wall flow structure that resembles a softer surface as the edge is approached and by injecting fluid right at the blunt trailing edge to decrease the shear stress in the free-shear layer. The well-established hybrid LES-APE method is applied to analyze the mechanisms such that the overall objective of a frequency and directivity independent noise reduction is achieved.
欧盟2020远景计划预计每架飞机的运营噪音将减少10分贝。也就是说,在着陆时,除了发动机噪声,特别是由高升力装置和起落架产生的机身噪声必须减少,因为它是同样重要的噪声源。由于代表细长机身的高升力装置和由钝体组成的起落架的流动特性不同,本建议将只考虑细长机身问题的降噪。作为一种通用构型,本文以有限厚度平板的后缘为例,数值分析了在设计“声学柔和”后缘时的降噪潜力。更准确地说,涡流在边缘对流时所经历的不连续性将被降低,以降低边缘散射的强度。这种不连续性的减少是通过在边缘上游注入额外的流体以在接近边缘时产生类似于较软表面的近壁流动结构来实现的,并通过在钝化后缘直接注入流体以降低自由剪切层中的剪应力来实现。采用成熟的混合LES-APE方法进行分析,从而实现了频率和方向性无关的降噪的总体目标。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

Professor Dr.-Ing. Wolfgang Schröder其他文献

Professor Dr.-Ing. Wolfgang Schröder的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('Professor Dr.-Ing. Wolfgang Schröder', 18)}}的其他基金

Numerical Investigation of Noise Generation and Noise Propagation of Coated Turbulent Swirl Flames
涂层湍流旋流火焰噪声产生和噪声传播的数值研究
  • 批准号:
    335858412
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Experimental Investigation of Turbulent Supersonic Film-Cooling Flows
湍流超音速薄膜冷却流的实验研究
  • 批准号:
    246312138
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Zeitlich und räumlich hochauflösende Wandschubspannungsmessungen mit dem Micro-Pillar-Shear-Stress-Sensor (MPS³) in Grenzschichten großer Reynoldszahl mit und ohne Druckgradient
使用微柱剪切应力传感器 (MPS³) 在具有大雷诺数的边界层(有压力梯度和无压力梯度)中进行高分辨率时空壁剪切应力测量
  • 批准号:
    216008676
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Analysis of Wake Induced Dynamic Stall on Wind Turbine Blades
风力发电机叶片尾流引起的动态失速分析
  • 批准号:
    218742980
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Numerical Investigation of Transition Mechanisms in Hypersonic Boundary Layers of Generic Reentry Geometries
一般再入几何结构高超声速边界层转变机制的数值研究
  • 批准号:
    211043694
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Numerical analysis of friction drag above moving surfaces
运动表面上方摩擦阻力的数值分析
  • 批准号:
    202188458
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Research Units
Experimental analysis of friction drag above moving surfaces
运动表面摩擦阻力的实验分析
  • 批准号:
    202176118
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Research Units
Zentralprojekt
中央项目
  • 批准号:
    202255255
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Research Units
Numerische Untersuchung der Lärmentstehung und der Lärmabstrahlung turbulenter Flammen
湍流火焰噪声产生和噪声辐射的数值研究
  • 批准号:
    135843392
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Diagnostik und Verlaufskontrolle von Lungenerkrankungen anhand exhalierter Aerosole (Untersuchung des Aerosoltransports)
利用呼出气溶胶对肺部疾病进行诊断和随访(气溶胶输送检查)
  • 批准号:
    34528484
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Research Grants

相似海外基金

Investigation of Mixing in Multiphase (gas, solid, and liquid) flow through Experimental and Numerical (Computational Fluid Dynamic) Techniques.
通过实验和数值(计算流体动力学)技术研究多相(气体、固体和液体)流中的混合。
  • 批准号:
    RGPIN-2015-06174
  • 财政年份:
    2021
  • 资助金额:
    --
  • 项目类别:
    Discovery Grants Program - Individual
Investigation of Mixing in Multiphase (gas, solid, and liquid) flow through Experimental and Numerical (Computational Fluid Dynamic) Techniques.
通过实验和数值(计算流体动力学)技术研究多相(气体、固体和液体)流中的混合。
  • 批准号:
    RGPIN-2015-06174
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Discovery Grants Program - Individual
Investigation of Mixing in Multiphase (gas, solid, and liquid) flow through Experimental and Numerical (Computational Fluid Dynamic) Techniques.
通过实验和数值(计算流体动力学)技术研究多相(气体、固体和液体)流中的混合。
  • 批准号:
    RGPIN-2015-06174
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Discovery Grants Program - Individual
Experimental, numerical and analytical investigation of droplet oscillation of a viscoelastic fluid
粘弹性流体液滴振荡的实验、数值和分析研究
  • 批准号:
    330615302
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Investigation of Mixing in Multiphase (gas, solid, and liquid) flow through Experimental and Numerical (Computational Fluid Dynamic) Techniques.
通过实验和数值(计算流体动力学)技术研究多相(气体、固体和液体)流中的混合。
  • 批准号:
    RGPIN-2015-06174
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Discovery Grants Program - Individual
Investigation of the dynamic pressure surge effect in a fluid-filled fracture through numerical modeling and laboratory experiment
通过数值模拟和室内实验研究充液裂缝中的动态压力波动效应
  • 批准号:
    1833058
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Investigation of Mixing in Multiphase (gas, solid, and liquid) flow through Experimental and Numerical (Computational Fluid Dynamic) Techniques.
通过实验和数值(计算流体动力学)技术研究多相(气体、固体和液体)流中的混合。
  • 批准号:
    RGPIN-2015-06174
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Discovery Grants Program - Individual
Modeling of complex fluid phenomena, investigation of multiscale structures and numerical analysis
复杂流体现象建模、多尺度结构研究和数值分析
  • 批准号:
    16KT0024
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Investigation of Mixing in Multiphase (gas, solid, and liquid) flow through Experimental and Numerical (Computational Fluid Dynamic) Techniques.
通过实验和数值(计算流体动力学)技术研究多相(气体、固体和液体)流中的混合。
  • 批准号:
    RGPIN-2015-06174
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Discovery Grants Program - Individual
Experimental and numerical investigation of the multiphase flow in the water model of a steel ladle as basis for the enhancement of multiphase flow models in computational fluid dynamics of metallurgical reactors
钢包水模型中多相流的实验和数值研究,作为增强冶金反应器计算流体动力学中多相流模型的基础
  • 批准号:
    311018762
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了