一、前言三十几年来,液体火箭发动机在整个火箭领域内一直起着重要的作用。液体火箭发动机在现在和将来的航天运载任务中仍将起着重要的作用。它在航天器大推力的起飞、进入近地球轨道或其它星球以及飞行过程中的机动飞行中都是必不可少的。在运载火箭系列内,固体火箭发动机在航天器的事故救险系统和软着陆系统中的应用以及电火箭发动机在飞行器定 I. Preface Thirty years ago, liquid rocket engines have played an important role in the rocket field. Liquid rocket motors will continue to play an important role in space missions now and in the future. It is essential for the launch of spacecraft large thrusts, access to near-earth orbit and other planets, and maneuvering flights. In the launch vehicle series, the application of solid rocket motors in spacecraft accident rescue systems and soft landing systems, and the application of electric rocket motors in aircraft