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Heat Pipe Science and Technology, An International Journal

Publicou 4 edições por ano

ISSN Imprimir: 2151-7975

ISSN On-line: 2151-7991

DEVELOPMENT OF AN AXIAL GROOVED HEAT PIPE WITH LOWCOEFFICIENT OF THERMAL EXPANSION

Volume 1, Edição 2, 2010, pp. 113-128
DOI: 10.1615/HeatPipeSciTech.v1.i2.10
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RESUMO

Due to their excellent stiffness-to-weight ratio, carbon-fiber-reinforced (CFRP) structures have become very popular in aerospace products. Spacecraft structures are generally designed as sandwich panels with CFRP face sheets and aluminum or nonmetallic honeycomb core material. Exceptions are so-called thermal radiators, which are spacecraft panels with embedded or surface-mounted heat pipes. These thermal radiators are also sandwich panels, but the face sheets are from an aluminum alloy to avoid any mismatch in the coefficient of thermal expansion (CTE). A low-CTE heat pipe has recently been developed that overcomes the problem of CTE mismatch of metallic tubing and CFRP face sheets in spacecraft radiators. The design principle features existing aluminum heat pipe profiles that are wrapped lengthwise with high-strength carbon fibers. During an increase of operating temperatures the fiber bundle hinders expansion of the metallic heat pipe profile and consequently reduces thermal expansion of the unit. During testing of heat pipe/carbon fiber prototypes a combined CTE of 6 ppm was reached, compared to 23 ppm for the pure metallic piece. The resulting CTE is adequate for bonding low-CTE heat pipes to standard CFRP face sheets of radiator panels. Failure tolerance against buckling, fatigue, and creep was verified by analysis.

CITADO POR
  1. Casalegno Valentina, Salvo Milena, Rizzo Stefano, Goglio Luca, Damiano Olivier, Ferraris Monica, Joining of carbon fibre reinforced polymer to Al-Si alloy for space applications, International Journal of Adhesion and Adhesives, 82, 2018. Crossref

  2. Lindenmaier Peter, Hartmann Dennis, Weiß Felix, CFRP radiator concept for space applications, CEAS Space Journal, 8, 2, 2016. Crossref

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