短脉冲激光作用下丙酮液池的沸腾研究

Study on Acetone Pool Boiling under Pulse-Laser Heating

采用短脉冲激光加热浸没在丙酮液体里的铂金属薄膜的实验方法并结合数值模拟计算 ,研究了高温升率条件下丙酮液体温度场随时间的变化规律及汽泡行为 ,得出了丙酮液池温度边界层的数量级大约为 4 0～ 70μm,确定了铂镀层表面的反射损失 ,认为薄汽膜的形成和热边界层外移 。

Pulsed laser heats the small platinum film which is immersed in acetone so that acetone can attain an extremely high rate of temperature rise. The acetone′s temperature time curve and its bubble behavior are studied by above experiment and numerical calculation. Acetone′s heat layer is about 40~70μm on the condition of this experiment. It shows that acetone vapor bubble still grows long after laser pulse finished for reasons of the formation of small vapor film,and that heat layer becomes thicker. It gets the loss of laser reflection on the surface of platinum film.