激光辐照下金属蒸气浪头自相似状态参量的稳定性分析

分析了金属材料在中强度激光辐照下气化蒸气在真空里的推进行为 ,结果显示 :( 1)金属蒸气的浪头状态参量存在自相似中间变元 ,此中间变元随辐照激光强度的不同而不同 ,但在一定的激光强度下 ;它有且只有一个取值 ,此值对应的浪头状态参量是稳定的 ;( 2 )密度和压强的浪头状态参量在激光强度小于 10 8W/cm2 时 ,两参量的取值非常小 ,当激光强度大于 10 8W/cm2 时 ,两参量的取值非常大 ;( 3 )速度浪头参量与辐照激光呈弱近似线性正比关系 ,决定该参量的主要因素是金属蒸气的性质和温度

The analysis of stability about wave self similar state parameter of metal vapor under laser irradiation

The carry behavior forward of gasification vapor in vacuum metal material by irradiatin of medium strength laser is analysed.The results show:(1)as to the wave state parameter of metal vapor,self similar intermediate element of change exists this intermediate element of change is not same along with the difference of irradiation laser strength,but under certain laser strength,it has and has one only taking value,this value corresponding wave state parameter is stabilized;(2)when laser strength is smaller than 10 8W/cm 2,the wave state parameter of density and of pressure taking value are very little,when laser strength is larger than 10 8W/cm 2,two parameter value are greater;(3)wave parameter of speed is weak approximate linear relation to irradiation laser major factor of the parameters decided is nature and temperature of metal vapor.