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
基本信息
- 批准号:335858412
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2017
- 资助国家:德国
- 起止时间:2016-12-31 至 2020-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The influence of an asymmetric combustor wall on thermoacoustic instabilities in confined swirl burner configurations has not been studied rigorously, neither numerically nor experimentally, although its impact is expected to be significant and could lead to a collapse of the whole combustor unit. Due to the influence of the combustor wall on the combustion process the interaction between the heat release of the flame and the acoustic field is modified in the azimuthal direction such that the formation and propagation of thermoacoustic instabilities are altered. Therefore, numerical analyses of fluid dynamical and acoustical modes of confined swirl burner configurations will be performed to identify thermoacoustic instabilities that can occur in real combustor configurations in the axial, radial, and azimuthal direction. The flow field and the acoustic field of open swirl burners as well as symmetric and asymmetric confined swirl burners will be computed and the acoustical and fluid mechanical interaction of the swirl flames with the combustor wall and its interaction with the free-shear layers and the external and central recirculation zones and the precessing vortex core (PVC) will be identified. The numerical investigations are based on large-eddy simulations (LES) and solutions of the acoustic perturbation equations such that the essential mechanisms of thermoacoustic instabilities can be understood by analyzing the acoustic source terms. Furthermore, the dynamic mode decomposition (DMD) method is used to compute the dominant modes of the LES solutions in the frequency space such that based on the acoustic and the DMD analyses the flame-flow and flame-acoustic interaction can be locally determined. The findings will result in understanding the axial, radial, and azimuthal thermoacoustic instabilities in the context of confined combustor systems.
非对称燃烧室壁对受限旋流燃烧器结构中热声不稳定性的影响还没有得到严格的数值和实验研究,尽管它的影响预计是巨大的,并可能导致整个燃烧室单元的坍塌。由于燃烧室壁面对燃烧过程的影响,在方位向改变了火焰的热释放与声场之间的相互作用,从而改变了热声不稳定性的形成和传播。因此,将对受限旋流燃烧器结构的流体动力学和声学模式进行数值分析,以确定在实际燃烧室结构中在轴向、径向和方位方向上可能发生的热声不稳定性。对开口旋流燃烧器、对称和非对称受限旋流燃烧器的流场和声场进行了计算,确定了旋流火焰与燃烧室壁面的声学和流体力学相互作用及其与自由剪切层、外回流区和中心回流区以及进动涡核(PVC)的相互作用。数值研究基于大涡模拟(LES)和声学微扰方程的解,从而可以通过分析声源项来理解热声不稳定性的基本机制。此外,还利用动态模式分解(DMD)方法计算了大涡模拟解在频率空间的主振型,从而可以根据声学和DMD分析来局部确定火焰流动和火焰-声学相互作用。这些发现将有助于理解受限燃烧室系统中的轴向、径向和方位向热声不稳定性。
项目成果
期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Noise sources of an unconfined and a confined swirl burner
来自非密闭和密闭旋流燃烧器的噪声源
- DOI:10.1016/j.jsv.2020.115293
- 发表时间:2020
- 期刊:
- 影响因子:4.7
- 作者:K. Pausch;S. Herff;W. Schröder
- 通讯作者:W. Schröder
LES of a turbulent swirl flame using a mesh adaptive level-set method with dynamic load balancing
使用具有动态负载平衡的网格自适应水平集方法对湍流旋流火焰进行 LES
- DOI:10.1016/j.compfluid.2021.104900
- 发表时间:2021
- 期刊:
- 影响因子:2.8
- 作者:S. Herff;A. Niemöller;M. Meinke;W. Schröder
- 通讯作者:W. Schröder
Impact of non-symmetric confinement on the flame dynamics of a lean-premixed swirl flame
- DOI:10.1016/j.combustflame.2021.111701
- 发表时间:2021-09
- 期刊:
- 影响因子:4.4
- 作者:S. Herff;K. Pausch;S. Loosen;W. Schröder
- 通讯作者:S. Herff;K. Pausch;S. Loosen;W. Schröder
Analysis of the sound sources of lean premixed methane–air flames
贫预混甲烷空气火焰声源分析
- DOI:10.1002/gamm.202200001
- 发表时间:2021
- 期刊:
- 影响因子:0
- 作者:S. Herff;K. Pausch;M. Meinke;W. Schröder
- 通讯作者:W. Schröder
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Professor Dr.-Ing. Wolfgang Schröder其他文献
Professor Dr.-Ing. Wolfgang Schröder的其他文献
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{{ truncateString('Professor Dr.-Ing. Wolfgang Schröder', 18)}}的其他基金
Experimental Investigation of Turbulent Supersonic Film-Cooling Flows
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- 批准号:
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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
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216008676 - 财政年份:2012
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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:
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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:
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Research Grants
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
- 批准号:
215421611 - 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
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
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