The full-flow stage combustion(FFSC) cycle engine may be applied in the next generation reusable launch vehicle.In order to meet the enhanced life of FFSCchamber

this paper employed some new technologies developed recently to the regeneratively-cooled thrust chamber for its design work.These technologies include formed platelet technology

high-aspect-ratio cooling passages and elastic cooling structure.While cooling models were established in consideration of the character of FFSCchamber

the modeling of applying these technologies to FFSCchamber was conducted.The results show that these methods can drastically reduce the temperature

the strain of hot-gas-side wall and the coolant pressure drop

and a regeneratively-cooled structure of the FFSCthrust chamber had been preliminarily designed.