TY - GEN
T1 - Experimental study and numerical analysis of unsteady pyrolysis gas motion inside of ablator
AU - Suzuki, Toshiyuki
AU - Sawada, Keisuke
AU - Yamada, Tetsuya
AU - Inatani, Yoshifumi
PY - 2003/12/1
Y1 - 2003/12/1
N2 - The pyrolysis gas pressure and temperature inside of ablator pieces are measured in the arc-heated wind tunnel. Obtained pressure and temperature data are compared with those given by the SCMA code that accounts for unsteady ablation. In the SCMA code, the motion of pyrolysis gas is calculated by solving the mass and the momentum conservation equations with assuming a finite permeability determined in this study. Though a quantitative agreement is not yet accomplished, the measured pressure profile that increases initially, turns to decrease and then reaches to a plateau is reproduced qualitatively by the SCMA code. It is suggested from the experimental data and the computed result that delamination of ablator likely occurs at the region where ablator is not fully charred but partially pyrolyzed resulting in a smaller porosity and higher pyrolysis gas pressure.
AB - The pyrolysis gas pressure and temperature inside of ablator pieces are measured in the arc-heated wind tunnel. Obtained pressure and temperature data are compared with those given by the SCMA code that accounts for unsteady ablation. In the SCMA code, the motion of pyrolysis gas is calculated by solving the mass and the momentum conservation equations with assuming a finite permeability determined in this study. Though a quantitative agreement is not yet accomplished, the measured pressure profile that increases initially, turns to decrease and then reaches to a plateau is reproduced qualitatively by the SCMA code. It is suggested from the experimental data and the computed result that delamination of ablator likely occurs at the region where ablator is not fully charred but partially pyrolyzed resulting in a smaller porosity and higher pyrolysis gas pressure.
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M3 - Conference contribution
AN - SCOPUS:84896797189
SN - 9781624100970
T3 - 36th AIAA Thermophysics Conference
BT - 36th AIAA Thermophysics Conference
T2 - 36th AIAA Thermophysics Conference 2003
Y2 - 23 June 2003 through 26 June 2003
ER -