Heterogenous Gas-Wall-Interactions in high enthalpy Non-Equilibrium Flows

高焓非平衡流中的非均质气体壁相互作用

基本信息

项目摘要

The planned project proposes the calibration of complex catalytic models for high-temperature materials in atmospheric entry relevant conditions in order to better understand gas-specific and single reaction mechanisms and their dominances at wide range of temperatures and pressures. The work proposal includes the implementation of an advanced methodology to experimentally determine recombination coefficients in high-enthalpy and non-equilibrium flows generated in plasma wind tunnels. Moreover, it includes experimental verifications for numerically reconstructed gas parameters and a validation of the methodology. Inductively heated plasma generators (IPG3-5) are I use for the IRS high-enthalpy plasma wind tunnel facility PWK3, which will be employed for the experimental part of the investigation in combination with adequately selected plasma diagnostics. An emphasis is put on the characterization of the boundary layer in order to increase the level of confidence for the assessment of the gas-surface interactions and of its relevant properties. An emissivity-independent technique for the determination of the radiative heat flux and the wall temperature is proposed in order to reduce the experimental uncertainties. For the numerical reconstruction of the boundary layer, supporting and complementing the experimentally obtained gas transport parameters, the IRS Upwind Relaxation Algorithm for Non-equilibrium flows of the University of Stuttgart (URANUS) will be used. Here, the extraordinary constellation is to be seen in the fact that complementary experimental numerical investigations of complex gas flows can be performed at one and the same institution. Moreover, the verification and validation level of URANUS is adequately well developed due to the successful comparison of simulation results with both in-flight data and experimental data from plasma wind tunnels.Samples out of silicon carbide SiC, and grade 5 titanium Ti6Al4V are in the course of this project, for which the gas-surface interaction properties are of high interest in space and earth applications.The project is planned for a three-year duration and is divided in five work packages, which logically and chronologically structure both the experimental and numerical activities. A small but essential upgrade of the existing plasma diagnostics is required in order to accomplish a proper flow calibration and material characterisation. Eventually, the flight-experiment catalysis-based sensor PHLUX will be assembled and exposed to a well-known and independently characterised flow condition in PWK3 for the validation of the methodology. The plasma composition will thus be assessed and respectively compared with results from other independent measurement techniques.
计划中的项目提议在进入大气层相关条件下校准高温材料的复杂催化模型,以便更好地了解气体特定和单一反应机制及其在广泛温度和压力范围内的主导作用。 工作建议包括实施一种先进的方法,以实验方式确定等离子体风洞中产生的高焓和非平衡流的复合系数。此外,它包括数值重建的气体参数和验证的方法的实验验证。感应加热等离子体发生器(IPG 3 -5)用于IRS高焓等离子体风洞设施PWK 3,它将用于研究的实验部分,并与适当选择的等离子体诊断相结合。重点放在边界层的表征,以增加的气体-表面相互作用及其相关属性的评估的置信水平。为了减少实验的不确定性,提出了一种与发射率无关的辐射热流密度和壁温的测定方法。对于边界层的数值重建,支持和补充实验获得的气体输运参数,将使用斯图加特大学(URANUS)的IRS非平衡流逆风松弛算法。在这里,非凡的星座是要看到的事实,即互补的实验数值研究复杂的气体流动可以在同一个机构进行。此外,由于模拟结果与飞行数据和等离子体风洞实验数据的成功比较,URANUS的验证和确认水平得到了充分的发展。碳化硅SiC和5级钛Ti6 Al 4V的样品正在该项目的过程中,该项目计划为期三年,分为五个工作包,它在逻辑上和时间上都构成了实验和数值活动。需要对现有的等离子体诊断进行少量但必要的升级,以便完成适当的流量校准和材料表征。最终,飞行实验催化传感器PHLUX将被组装并暴露于PWK 3中众所周知的独立表征的流动条件下,以验证方法。因此,将评估血浆组成,并分别与其他独立测量技术的结果进行比较。

项目成果

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Privatdozent Dr.-Ing. Georg Herdrich其他文献

Privatdozent Dr.-Ing. Georg Herdrich的其他文献

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{{ truncateString('Privatdozent Dr.-Ing. Georg Herdrich', 18)}}的其他基金

Numerical and experimental Investigation of the electromagnetic coupling in hybrid DC-RF Plasma Sources
混合 DC-RF 等离子体源中电磁耦合的数值和实验研究
  • 批准号:
    235472435
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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