An annular cavity placed around the anode of arcjet was designed to form a regenerative cooling channel on the base of an arc jet.
该文在原有电弧加热发动机基础上进行改进，设计了覆盖发动机阳极的环形空腔，形成再生冷却通道。
英语百科
Regenerative cooling
Regenerative cooling is a method of cooling gases in which compressed gas is cooled by allowing it to expand and thereby take heat from the surroundings. The cooled expanded gas then passes through a heat exchanger where it cools the incoming compressed gas.