微重力科学与应用研究（上）

空间微重力环境的独特物理现象对航天器各系统均产生无法回避的影响，在型号研制中正确计入微重力效应是航天事业发展中的一个重要研究领域。在现阶段，航天器发动机再启动相关的微重力研究以及载人航天防火安全相关的微重力研究应当引起人们的高度重视。随航天事业的发展，微重力效应问题日益会严重起来（结构动力学、耦合动力学、多相流温控、低重星球场着陆撞击……），进行深入广泛的微重力效应研究对保证航天器飞行任务完成有着不应忽视的作用

MICROGRAVITY SCIENCE AND APPLICATIONS

It is known that there are unique physics phenomena in microgravity environment and those phenomena cause some effects in each system of a spacecraft which are no possible to be avoided in general case. Microgravity effects as an emphasized field should be considered correctly in our spacecraft design and development. At present, special attention will be paid to those fields including engine restart and fire safety. Therefore, as examples, some latest results from numerical calculations and experiments are presented in the paper. The aim of this paper is to push the research in these fields. During the flight of a spacecraft in the microgravity conditions, the situation may become even more complicated in the future because of the effects of some new factors(structural dynamics, multi-phase flow in temperature controller, landing impact on low-gravity planet, etc) which we will have to consider in our design from now on, so that to continue doing microgravity research may be highly important to pledge to fulfil a flight task. That is a fact which we must not neglect.