One-dimensional Ablation Analysis of Lightweight CFRP Ablators with Coking

Autor:	Keiichi Okuyama, Takayuki Shimoda, Shunsuke Sakai, Shoichi Matsuda, Bianca Szasz, Sumio Kato, Naoyuki Shimada
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	Materials science medicine.medical_treatment technology industry and agriculture Ablation complex mixtures respiratory tract diseases Lightweight Ablator Re-Entry Capsule Heat shield Coking medicine Composite material Heat Shield
Zdroj:	Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan. 17(4):461-470
ISSN:	1884-0485
Popis:	The coking phenomenon within a lightweight carbon-phenolic ablator exposed to the heating environment of air is investigated. The existing one-dimensional charring ablation analysis code is modified so that the coking behavior of the ablator can be calculated as well as the thermal response behavior within a lightweight carbon-phenolic ablator. The mass conservation equations for a pyrolysis gas and carbon in the gas are given. The energy equation including the coking process is also presented. The measured density distributions of some arc-heated CFRP ablator samples are compared with those calculated by the ablation analysis code, from which good agreement is obtained. The density profiles with and without coking are compared. The effect of temperature dependency of carbon mass fraction in a pyrolysis gas in the coking equation upon the density profile is examined. The effect of heating rate upon the density distribution in an ablator is also examined. The effect of coking upon the surface recession is studied analytically and experimentally. 31st International Symposium on Space Technology and Science (ISTS), June 3-9, 2017, Matsuyama, Ehime , Japan
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ecc56e2cd746469f6dd7c12d0056e6dd https://kyutech.repo.nii.ac.jp/records/6104 Zobrazit plný text záznamu