【摘要】 研究外界辐射加热下，不同重力环境中热薄燃料的着火特性．探讨了重力、环境氧浓度、环境压力及外界辐射强度对着火的影响．结果表明，随着重力的变化，存在不同的着火机制．在微重力和在高的环境氧浓度中，材料的着火延迟时间变短．压力减小，着火延迟时间增大．随着辐射强度的增大，着火延迟时间变小．更多还原

【Abstract】 The ignition over a thermally thin solid fuel heated by external radiation was investigated under different gravity environment. The effects of gravity, ambient oxygen concentration, ambient pressure, and the intensity of the external radiation on the ignition behavior were studied. Results showed that there are two types of ignition mechanisms in variation of gravity. The ignition delay time is decreased in microgravity and in higher ambient oxygen concentration. As the ambient pressure is decreased, the ignition delay time is increased. Response of the ignition characteristics to the intensity of the external radiation is different. The ignition delay time is decreased with increasing the radiation intensity.更多还原