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International Heat Transfer Conference 13

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

A STUDY OF EFFECTS OF PYROLYSIS EXPANDSION AND LINEAR EXPANSION OF CHARRING ABLATION MATERIALS

A.-L. Wang
China Aerodynamics Research and Development Center, Mianyang, China

Yewei Gui
State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, 2nd Ring Road South Section 6, Mianyang Sichuan 621000, China

L.-X. He
China Aerodynamics Research and Development Center, Mianyang, China

Wei Tang
State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China

DOI: 10.1615/IHTC13.p27.70
7 pages

Abstract

The surface ablation, the pyrolysis expansion and the linear expansion of thermal protection layer are the key factors for the thickness variation of thermal protection layer and internal temperature field. The surface ablation is widely discussed, while the other two factors are rarely involved. The ablation and internal temperature field for the phenalic-SiO2 thermal protection materials are numerically simulated, which indicated that pyrolysis expansion and linear expansion are very important to both the thickness variation of thermal protection layer and the internal temperature field. Both the characteristics of the aerodynamic heating and the effect of the uncertainty of material properties are investigated, and the results shown that the further detail research on pyrolysis expansion phenomena is needed.

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Measurement of fluid temperature with an arrangement of three thermocouples