Low order modeling method for assessing the temperature of multi-perforated plates

Romain Bizzari; Dorian Lahbib; Antoine Dauptain; Florent Duchaine; Stephane Richard; Franck Nicoud

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Low order modeling method for assessing the temperature of multi-perforated plates

机译：用于评估多孔板温度的低阶建模方法

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A low-order model is proposed to predict the temperature of a multi-perforated plate from an unresolved adiabatic computation. Its development relies on the analysis of both an adiabatic and a conjugate heat transfer wall resolved large eddy simulation of an academic multi-perforated liner representative of the cooling systems used in combustion chambers of actual aero-engines. These two simulations show that the time averaged velocity field is marginally modified by the coupling with the heat diffusion in the perforated plate when compared to the adiabatic case. This gives rise to a methodology to assess the wall temperature from an unresolved adiabatic computation. It relies on heat transfer coefficients from referenced correlations as well as a mixing temperature relevant to the flow in the injection region where the cold micro-jets mix with the hot outer flow. In this approach, a coarse mesh simulation using an homogeneous adiabatic model for the aerodynamics of the flow with effusion is post-processed to provide a low cost alternative to conjugate heat transfer computations based on hole resolved meshes. The model is validated on an academic test case and successfully applied to a real industrial combustion chamber.

机译：提出了一种低阶模型，通过未解析的绝热计算来预测多孔板的温度。它的发展依赖于绝热和共轭传热壁的解析，它解析了代表实际航空发动机燃烧室中使用的冷却系统的学术多孔穿孔衬套的大涡模拟。这两个模拟表明，与绝热情况相比，时间平均速度场通过与多孔板中热扩散的耦合而略有改变。这就产生了一种通过未解析的绝热计算来评估壁温的方法。它依赖于参考相关性的传热系数以及与注射区域中的流动相关的混合温度，在注射区域中，冷微喷流与热外部流混合。在这种方法中，对带有渗出流的空气动力学使用均质绝热模型的粗网格模拟进行了后处理，以提供基于孔分辨网格的共轭传热计算的低成本替代方案。该模型在一个学术测试案例上得到了验证，并成功应用于实际的工业燃烧室。

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《International Journal of Heat and Mass Transfer》 |2018年第ptab期|727-742|共16页
作者
Romain Bizzari; Dorian Lahbib; Antoine Dauptain; Florent Duchaine; Stephane Richard; Franck Nicoud;
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
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正文语种 eng
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Low order modeling method for assessing the temperature of multi-perforated plates

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