As the quenching speed of the strong rarefaction wave reaches610Ks-1, a nonequilibrium ionization-recombination process takes place, during which the ion recombination with electrons dominates.

• 首先通过反射激波加热使试验气体电离,随后利用在激波管高压室端部反射的强稀疏波使反射激波后5区离化气体快速冷却,由于稀疏波的冷却速度达到610Ks-1,创造出使离化气体处于以电离复合为主的非平衡过程的条件。