Abstract:In future, the characteristic of reentry thermal environment is high enthalpy,high heat flux and low
pressure. In order to meet the requirements,the performance of different light weight charring ablators in high enthalpy
ablation test must be known. These kinds of tests have been carried out by using super-enthalpy arc-heater. Subsequently
through the description of test data, the characteristics of light weight charring ablators ablated in high enthalpy
and low pressure are given. At last contrasting to the normal test with middle enthalpy,the ablative performances affected
by enthalpy of light weight charring ablators are detailedly analyzed. The results show that super-enthalpy archeater
can produce a high enthalpy and low pressure flow field stably and uniformly. The performances of light weight
charring ablators are improved in high enthalpy environment.
