국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Nonequilibrium Ablation of Phenolic Impregnated Carbon Ablator
저자	Milos, Frank S.;; Chen, Yih K.;; Gokcen, Tahir
Keyword	ABLATION;; ABLATIVE MATERIALS;; CARBON;; CHARRING;; DEPTH;; HEAT FLUX;; RECESSION;; SURFACE TEMPERATURE;; TEMPERATURE EFFECTS;; THERMOCOUPLES
URL	http://hdl.handle.net/2060/20120017464
보고서번호	ARC-E-DAA-TN6112
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	In previous work, an equilibrium ablation and thermal response model for Phenolic Impregnated Carbon Ablator was developed. In general, over a wide range of test conditions, model predictions compared well with arcjet data for surface recession, surface temperature, in-depth temperature at multiple thermocouples, and char depth. In this work, additional arcjet tests were conducted at stagnation conditions down to 40 W/sq cm and 1.6 kPa. The new data suggest that nonequilibrium effects become important for ablation predictions at heat flux or pressure below about 80 W/sq cm or 10 kPa, respectively. Modifications to the ablation model to account for nonequilibrium effects are investigated. Predictions of the equilibrium and nonequilibrium models are compared with the arcjet data.