Investigation on flame spread characteristics of partially prevaporized droplets by using infrared laser absorption method and modeling

将3.39μm红外激光吸收测量燃油蒸汽浓度应用于微重力实验，以阐明燃油蒸汽浓度在液滴周围的分布对部分预喷化液滴间火焰传播特性的影响。对滴径为1 mm的正十烷液滴阵列，在预雾化1.2s后的500K空气中，通过沿阵列轴线扫描激光路径，成功地实现了燃料蒸汽浓度沿轴向分布的定性测量。

Application of 3.39μm Infrared laser absorption method for measurement of fuel vapor concentration to microgravity experiments was performed, toward clarification of the effects of fuel vapor concentration distribution around droplets on flame spread characteristics between partially prevaporized droplets. By scanning the laser path along the axis of the array in 500K air after 1.2s prevaporization, qualitative measurement of fuel vapor concentration distribution along the axis was successfully achieved, for n-decane droplet array with 1mm drolet diameter.