中文摘要：

运用光悬浮技术研究微尺度下单颗碳粉颗粒在常温常压下、静止空气环境中的点燃和燃烧特性.结果表明,碳粉颗粒可被俘获至激光光镊中心位置,并被点燃,其点火功率为9.0 mW,同时观察到碳粉颗粒发生爆裂,爆裂延迟时间为6～18ms.提高激光功率,颗粒发生有焰燃烧,形成明亮的火焰面.起始阶段,火焰面积和亮度均增加,而后火焰面积逐渐变小,亮度变暗直至熄灭.

英文摘要：

Optical levitation is used to ignite and combust powdered ink in the micro-combustion.At the micro-scale,the ignition and combustion characteristics of powdered ink are investigated in static air at atmospheric pres-sure and temperature.Powdered ink can be effectively trapped by optical tweezers and located at the focal point.Laser ignition of powdered ink at an input power of 9.0,mW takes place and isfollowed by the microexplosion of powdered ink with the delay time of 6-18,ms.As the laser power increases,the combustion flame can be clearly ob-served.The flame structure and brightness can be identified.The envelop flame increases at the initial stage of com-bustion,and the brightness is also enhanced.The envelop flame then decreases,and the brightness weakens until the combustion of powdered ink is completely finished at the end of combustion.