Dynamics of pyrolysis gas in charring materials ablation

Hyo Keun Ahn; Chul Park; Keisuke Sawada

doi:10.2514/6.1998-165

Dynamics of pyrolysis gas in charring materials ablation

Hyo Keun Ahn, Chul Park, Keisuke Sawada

ENG - Aerospace Engineering

Research output: Contribution to conference › Paper › peer-review

21 Citations (Scopus)

Abstract

The ablation phenomenon of a charring heatshield material is calculated accounting for the heat absorption by the pyrolysis gas during its travel through the char. The motion of the pyrolysis gas is calculated by solving the equations for conservation of its mass and momentum. The method shows that cooling by the pysolysis gas is substantial. The method is validated by comparing with the experimental data obtained in an arc-jet wind tunnel. The method is applied for the heating and ablation of the Pioneer- Venus Probe vehicles in their stagnation region. A fair agreement is seen between the calculation and the flight data.

Original language	English
DOIs	https://doi.org/10.2514/6.1998-165
Publication status	Published - 1998 Jan 1
Event	36th AIAA Aerospace Sciences Meeting and Exhibit, 1998 - Reno, United States Duration: 1998 Jan 12 → 1998 Jan 15

Other

Other	36th AIAA Aerospace Sciences Meeting and Exhibit, 1998
Country/Territory	United States
City	Reno
Period	98/1/12 → 98/1/15

ASJC Scopus subject areas

Engineering(all)
Space and Planetary Science

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abstract = "The ablation phenomenon of a charring heatshield material is calculated accounting for the heat absorption by the pyrolysis gas during its travel through the char. The motion of the pyrolysis gas is calculated by solving the equations for conservation of its mass and momentum. The method shows that cooling by the pysolysis gas is substantial. The method is validated by comparing with the experimental data obtained in an arc-jet wind tunnel. The method is applied for the heating and ablation of the Pioneer- Venus Probe vehicles in their stagnation region. A fair agreement is seen between the calculation and the flight data.",

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AU - Ahn, Hyo Keun

AU - Park, Chul

AU - Sawada, Keisuke

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Y1 - 1998/1/1

N2 - The ablation phenomenon of a charring heatshield material is calculated accounting for the heat absorption by the pyrolysis gas during its travel through the char. The motion of the pyrolysis gas is calculated by solving the equations for conservation of its mass and momentum. The method shows that cooling by the pysolysis gas is substantial. The method is validated by comparing with the experimental data obtained in an arc-jet wind tunnel. The method is applied for the heating and ablation of the Pioneer- Venus Probe vehicles in their stagnation region. A fair agreement is seen between the calculation and the flight data.

AB - The ablation phenomenon of a charring heatshield material is calculated accounting for the heat absorption by the pyrolysis gas during its travel through the char. The motion of the pyrolysis gas is calculated by solving the equations for conservation of its mass and momentum. The method shows that cooling by the pysolysis gas is substantial. The method is validated by comparing with the experimental data obtained in an arc-jet wind tunnel. The method is applied for the heating and ablation of the Pioneer- Venus Probe vehicles in their stagnation region. A fair agreement is seen between the calculation and the flight data.

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T2 - 36th AIAA Aerospace Sciences Meeting and Exhibit, 1998

Y2 - 12 January 1998 through 15 January 1998

ER -

Dynamics of pyrolysis gas in charring materials ablation

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