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

基本信息

项目摘要

The overall objective of this proposal is the identification of essential effects and mechanisms that lead under perturbed freestream conditions and various types of roughness distributions to laminar-turbulent transition on the frontbody of blunt reentry vehicles. To satisfy this objective the determination of the pertubations in the wind tunnel flow of the Hypersonic Ludwieg Tube Braunschweig (HLB), which is based on experimental data from TP2-BS and direct numerical simulation results from TP1 , will be improved by using a stagnation-point probe. This is a consequent result of the first funding period in which it was shown that the cone probe has unfavorable properties for the modal decomposition of the measured tunnel noise. The pertubation data of the wind tunnel in conjunction with novel transition experiments in the HLB will be linked to the determined tunnel noise and used to improve correlations of transition and tunnel noise. In the numerical investigations in the second funding period, the interaction of the determined tunnel noise and distributed roughness on the forebody of a blunt reentry vehicle will be analyzed. Since it was shown in TP2-GÖ that modal growth can not be expected for the reentry vehicle in the current Reynolds number range of the HLB, non-modal transient growth is investigated in the wake of the roughness. Therefore, it is to be analyzed how tunnel noise under certain conditions excites stable boundary layer modes and such influences transient growth. Next, the influence of various arrangements of deterministic distributed roughness is investigated to understand whether or not the roughness arrangement has a fundamental impact. If this is not the case, easily parameterizable deterministic distributed roughness can be used in future numerical and experimental investigations to mimic more realistic stochastically distributed rough surfaces.
该方案的总体目标是确定在扰动的自由流条件和各种类型的粗糙度分布下导致钝化再入飞行器前体发生层流-湍流转变的基本效应和机理。为了满足这一目标,基于TP2-BS的实验数据和TP1的直接数值模拟结果确定高超声速路德维格布朗斯韦格管(HLB)风洞流动中的摄动,将使用驻点探头进行改进。这是第一个注资期的结果,在第一个注资期内,表明锥形探头对测量的隧道噪声的模式分解具有不利的特性。风洞的扰动数据与HLB中新的过渡实验相结合,将与所确定的隧道噪声相关联,并用于改善过渡与隧道噪声的相关性。在第二个注资期的数值研究中,将分析所确定的隧道噪声和分布粗糙度对钝体再入飞行器前身的相互作用。由于在TP2-G?中表明,在当前的HLB雷诺数范围内,再入飞行器不可能出现模式增长,因此研究了粗糙度之后的非模式瞬时增长。因此,要分析隧道噪声在一定条件下如何激发稳定的边界层模式,从而对瞬时增长产生影响。其次,研究了确定性分布粗糙度不同排列方式的影响,以了解这种粗糙度排列方式是否具有根本性影响。如果不是这样,可以在未来的数值和实验研究中使用易于参数化的确定性分布粗糙度来模拟更真实的随机分布粗糙表面。

项目成果

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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

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
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    --
  • 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 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
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

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壁面剪切流中亚临界湍流转变的普遍性研究及工程应用随机模型的发展
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