Simulation of convective heat flux and heat penetration for a spacecraft at re-entry

Meese, Ernst A.; Nørstrud, Helge

doi:10.1016/s1270-9638(02)01165-3

Cited by 15 publications

(12 citation statements)

References 8 publications

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“…[1] The layered hybrid composite structure shown in Figure 1 is an example of a multifunctional system designed for such applications. Each layer contributes properties suited to a particular task, including the thermal protection of the oxide ceramic, mechanical damping and toughness of the shape memory alloy (SMA), and the high strength-to-weight ratio of the polymer matrix composite (PMC).…”

Section: Introductionmentioning

confidence: 99%

Active Cooling of a Microvascular Shape Memory Alloy‐Polymer Matrix Composite Hybrid Material

Coppola

Thakre

et al. 2016

Adv Eng Mater

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Microvascular shape memory alloy (SMA)-polymer matrix composite (PMC) hybrid materials are fabricated using the Vaporization of Sacrificial Components (VaSC) technique. Two types of sacrificial materials are used: Mg wires in the SMA (nickel titanium) and poly(lactic acid)/tin(II) oxalate fibers in the PMC (glass fiber/epoxy). These sacrificial materials survive the initial solidification of the host materials, then are vaporized during a final thermal treatment to reveal the vascular network. The effect of VaSC on composition and transformation temperatures of the SMA are examined. Active cooling through the vascular network maintains temperature in the PMC below the glass transition temperature (152 C) at heat fluxes as high as 300 kW m À2 , while this temperature is exceeded without cooling at just 10 kW m À2 .

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Section: Introductionmentioning

confidence: 99%

Active Cooling of a Microvascular Shape Memory Alloy‐Polymer Matrix Composite Hybrid Material

Coppola

Thakre

et al. 2016

Adv Eng Mater

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“…Polymer matrix composites (PMCs) are susceptible to reduced structural performance at elevated temperatures, such as those experienced during high speed flight [1][2][3], vehicle transportation [4][5][6], and during cycling of batteries, fuel cells, and other electronics [7][8][9]. Typical polymer matrices, such as epoxy, polyester, and vinyl-ester, have glass transition temperatures (T g ) at or below 200°C, forcing the use of alternative materials such as metals and ceramics at service temperatures [3].…”

Section: Introductionmentioning

confidence: 99%

Retention of mechanical performance of polymer matrix composites above the glass transition temperature by vascular cooling

Coppola

Griffin

Sottos

et al. 2015

Composites Part A: Applied Science and Manufacturing

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“…The current effort is to model the heat transfer through the foam layer so that the temperature at the interface of foam and polymer would not exceed the temperature of 533 K (or 500°F). Simulations performed indicate that the re‐entry velocity can be 7622 m/s, and the averaged heat flux at the surface can reach 138.77 kW/m 2 , with maximum surface temperature of 1642 K. Meese et al . claimed that the simulations matched NASA's data.…”

Section: Discussionmentioning

confidence: 99%

Effect of Foam Properties on Heat Transfer in High Temperature Open‐Cell Foam Inserts

et al. 2012

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Light weight materials such as foams can be used in thermal protection and/or thermal insulation systems. At high temperature (>1000 K), thermal radiation may be important or dominate heat transfer in the foam; however, studies based on more detailed thermal radiation analysis are limited. In this study, foams are considered to be semitransparent, because radiation can penetrate through the pore (or void) space and/or foam skeleton (solid matrix), depending on the materials from which the foams are made. Of particular interest in this study is to understand how the properties such as foam material, porosity, pore size, etc. affect thermal and radiant energy transfer. Physical and mathematical models are developed to account for conduction and radiation (absorption, emission and scattering) in the porous material. The spectral extinction coefficients of SiC foams are measured experimentally in the laboratory at room temperature, and the radiative transfer equation is solved using the spherical harmonics P1‐approximation. The predicted radiative heat fluxes in foams are compared with those based on the Rosseland diffusion approximation. Parametric calculations have been carried out, and the results are reported in the article for a range of parameters characterizing heat transfer in SiC foams of different porosities to identify desirable conditions for effectively reducing heat transfer in potential thermal protection concepts.

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Simulation of convective heat flux and heat penetration for a spacecraft at re-entry

Cited by 15 publications

References 8 publications

Active Cooling of a Microvascular Shape Memory Alloy‐Polymer Matrix Composite Hybrid Material

Active Cooling of a Microvascular Shape Memory Alloy‐Polymer Matrix Composite Hybrid Material

Retention of mechanical performance of polymer matrix composites above the glass transition temperature by vascular cooling

Effect of Foam Properties on Heat Transfer in High Temperature Open‐Cell Foam Inserts

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