Fully Coupled Material Response and Internal Radiative Heat Transfer for Three-Dimensional Heat Shield Modeling

IF 1.1 4区 工程技术 Q4 ENGINEERING, MECHANICAL
Raghava S. C. Davuluri, Rui Fu, K. A. Tagavi, Alexandre Martin
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引用次数: 1

Abstract

A material response code is strongly coupled with a radiative transfer equation (RTE) to evaluate the effect of a spectrally resolved heat flux on the thermal response of a heat shield. A [Formula: see text] approximation model of RTE is used to account for radiation heat transfer within the material. First, the RTE model is verified by comparing the numerical results with the analytical solution. Next, the coupling scheme is verified by comparing the temperature histories computed by the pure conduction scheme with the ones computed by conduction coupled with radiative emission. The verification study is conducted using test cases from the literature (radiant heating, arc jet heating, and space shuttle entry) as well as on a 3D Block, a 2D IsoQ sample, and the Stardust Return Capsule. The verification results are satisfactory for all cases. Thus, the verification results indicate that the coupling approach can accurately simulate the thermal response of the material. The coupling scheme was then used to simulate a laser heating experiment that studied the impact of spectral radiative heat transfer on ablative material. The results from the laser ablation simulations exhibit a behavior analogous to the experimental observations, indicating the importance of spectral radiative flux on the material response.
全耦合材料响应和内部辐射传热的三维隔热板建模
将材料响应代码与辐射传递方程(RTE)强耦合,以评估光谱分解热通量对隔热板热响应的影响。采用RTE的近似模型来考虑材料内部的辐射传热。首先,通过数值结果与解析解的比较,对RTE模型进行了验证。然后,通过将纯传导方案计算的温度历史与传导与辐射耦合计算的温度历史进行比较,验证了耦合方案。验证研究使用了文献中的测试案例(辐射加热、电弧射流加热和航天飞机进入),以及3D块、2D IsoQ样品和Stardust返回舱。所有情况下的验证结果都令人满意。因此,验证结果表明,耦合方法可以准确地模拟材料的热响应。利用该耦合方案模拟激光加热实验,研究了光谱辐射传热对烧蚀材料的影响。激光烧蚀模拟结果与实验观测结果相似,表明了光谱辐射通量对材料响应的重要性。
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来源期刊
Journal of Thermophysics and Heat Transfer
Journal of Thermophysics and Heat Transfer 工程技术-工程:机械
CiteScore
3.50
自引率
19.00%
发文量
95
审稿时长
3 months
期刊介绍: This Journal is devoted to the advancement of the science and technology of thermophysics and heat transfer through the dissemination of original research papers disclosing new technical knowledge and exploratory developments and applications based on new knowledge. The Journal publishes qualified papers that deal with the properties and mechanisms involved in thermal energy transfer and storage in gases, liquids, and solids or combinations thereof. These studies include aerothermodynamics; conductive, convective, radiative, and multiphase modes of heat transfer; micro- and nano-scale heat transfer; nonintrusive diagnostics; numerical and experimental techniques; plasma excitation and flow interactions; thermal systems; and thermophysical properties. Papers that review recent research developments in any of the prior topics are also solicited.
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