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Evaluation of the Energy Transfer in the Char Zone During Ablation. Part 1 - Theoretical and Experimental Results for Heat Shield Surface Temperatures Up to 3000 F Final Report

机译：烧蚀过程中炭区能量转移的评价。第1部分 - 热屏表面温度的理论和实验结果高达3000 F最终报告

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作者
April, G. C.; Del Valle, E. G.; Pike, R. W.;
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年度 1969
页码 1-109
总页数 109
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Ablative materials ; Charring ; Energy transfer ; Carbonization ; Heat shielding ; Polyamide resins ; Pyrolysis;

机译：烧蚀材料;炭化;能量转移;碳化;热屏蔽;聚酰胺树脂;热解;

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1. Experimental and theoretical study of an open multi-compartment absorption heat transformer for different steam temperatures. Part I: hydrodynamic and heat transfer chatacteristics [J] . M. Scott, A. Jernqvist, J. Olsson, Applied thermal engineering: Design, processes, equipment, economics . 1999,第3期

机译：敞开式多室吸收式换热器在不同蒸汽温度下的实验和理论研究。第一部分：流体动力学和传热特性
2. Extended performance evaluation criteria for enhanced heat transfer surfaces: heat transfer through ducts with constant wall temperature [J] . Ventsislav Zimparov International Journal of Heat and Mass Transfer . 2000,第17期

机译：增强的传热表面的扩展性能评估标准：壁温恒定时通过管道的传热
3. PREDICTION OF TRANSFER BAR TEMPERATURE DROP WITH EXPERIMENTAL HEAT SHIELD MODULE AT HOT STRIP MILL OF ROUKELA STEEL PLANT [J] . P. P. Sengupta, R.C. Behera Transactions of the Indian Institute of Metals . 2000,第6期

机译：鲁凯拉钢厂热轧机带实验热屏蔽模块的传热棒温度下降预测
4. MIRKA Heat Shield Experiment HEATIN-Theoretical and Experimental Approach to the Surface Protected Ablator [C] . G. Reich, G.Jahn International Conference on Environmental Systems . 1997

机译：Mirka热盾试验热量 - 理论和实验方法，表面保护烧蚀器
5. Experimental pressure and heat transfer investigation over a "directed-energy air spike" inlet at flow mach numbers of 10 to 20, stagnation temperature of 1000 K, and arc powers up to 127 KW. [D] . Toro, Paulo Gilberto de Paula. 1998

机译：在流量为10至20的马赫数，停滞温度为1000 K，电弧功率高达127 KW的“定向能空气尖峰”入口上进行实验压力和传热研究。
6. Flow cytometric measurement of fluorescence resonance energy transfer on cell surfaces. Quantitative evaluation of the transfer efficiency on a cell-by-cell basis. [O] . L Trón, J Szöllósi, S Damjanovich, 1815

机译：流式细胞仪测量细胞表面荧光共振能量转移。逐个单元定量评估转移效率。
7. This article presents a new numerical model describing the behaviour of a thermally thick wood sample exposed to high solar heat flux (above 1 MW/m2). A preliminary study based on dimensionless numbers is used to classify the problem and support model building assumptions. Then, a model based on mass, momentum and energy balance equations is proposed. These equations are coupled with liquid-vapour drying model and pseudo species biomass degradation model. By comparing to a former experimental study, preliminary results have shown that these equations are not enough to accurately predict biomass behaviour under high solar heat flux. Indeed, a char layer acting as radiative shield forms on the sample exposed surface. In addition to this classical set of equations, it is mandatory to take into account radiation penetration into the medium. Furthermore, as biomass contains water, medium deformation consecutively to char steam gasification must also be implemented. Finally, with the addition of these two strategies, the model is able to properly capture the degradation of biomass when exposed to high radiative heat flux over a range of sample initial moisture content. Additional insights of biomass behaviour under high solar heat flux were also derived. Drying, pyrolysis and gasification fronts are present at the same time inside of the sample. The coexistence of these three thermochemical fronts leads to char gasification by the steam produced from drying of the sample, which it is the main phenomenon behind medium ablation. [O] . Pozzobon, Victor, Salvador, Sylvain, Bézian, Jean Jacques 2018

机译：本文提供了一个新的数值模型，该模型描述了暴露于高太阳热通量（高于1 / MW / m2）的热厚木材样品的行为。基于无量纲数的初步研究用于对问题进行分类并支持模型构建假设。然后，提出了一种基于质量，动量和能量平衡方程的模型。这些方程式与液体蒸汽干燥模型和假物种生物质降解模型耦合。通过与以前的实验研究进行比较，初步结果表明，这些方程不足以准确预测高太阳热通量下的生物量行为。的确，在样品暴露的表面上形成了充当辐射屏蔽层的炭层。除了这套经典的方程式之外，还必须考虑到辐射向介质的渗透。此外，由于生物质中含有水，因此还必须在炭蒸气汽化后进行连续的介质变形。最后，通过添加这两种策略，该模型能够在一定范围的样品初始水分含量下暴露于高辐射热通量的情况下，正确捕获生物质的降解。还得出了在高太阳热通量下生物量行为的其他见解。样品内部同时存在干燥，热解和气化前沿。这三个热化学前沿的共存会导致样品干燥产生的蒸汽产生焦炭气化，这是介质烧蚀的主要现象。
8. Evaluation of the energy transfer in the char zone during ablation. Part 1 - Theoretical and experimental results for heat shield surface temperatures up to 3000 F Final report [R] . April, G. C., Del Valle, E. G., Pike, R. W. 1969

机译：评估消融过程中炭区的能量转移。第1部分 - 隔热板表面温度高达3000 F的理论和实验结果。最终报告

Evaluation of the Energy Transfer in the Char Zone During Ablation. Part 1 - Theoretical and Experimental Results for Heat Shield Surface Temperatures Up to 3000 F Final Report

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