利用成熟的气体导热模型和气体分子运动论 ,对快速瞬态高强度加热情况下的热传导问题进行了理论研究。考虑到热松弛时间和热松弛长度的影响 ,对在微小尺度的热传导问题给出了傅立叶定律的修正式 ,并结合能量守恒定律建立了相应情况下的热传导微分方程。最后 ,依据热松弛时间和热松弛长度对热传导过程的影响 ,对快速瞬态高强度加热情况下的热传导问题进行了分析和讨论。 Using the mature model of gas thermal conductivity and gas molecular kinematics, the thermal conduction problems under fast transient high-intensity heating are theoretically studied. Taking into account the effect of thermal relaxation time and thermal relaxation length, a modified version of Fourier’s law is given for the heat conduction problem at the microscale, and the corresponding heat conduction differential equation is established based on the law of conservation of energy. Finally, based on the influence of thermal relaxation time and thermal relaxation length on the thermal conduction process, the heat conduction problems under fast transient high-intensity heating are analyzed and discussed.