Abstract
In this paper we have proposed the simple and effective approach to activation of the low reactivity industrial fuel which can be used immediately inside the furnace. The high-power laser pulses initiates partial gasification of the fuel together with its ultra-fine atomization. The gas-aerosol cloud surrounding the initial coal-water slurry droplet can consist of approximately 10% (after absorption of hundred pulses) of the initial droplet weight. The ratio of the syngas and aerosol weights is like 1:2 when pulse intensity is higher than 8 J/cm 2 . The size and velocity distributions of the ultra-fine aerosol particles were analysed using the original realization of the particle tracking velocimetry technique.
Highlights
An ignition delay time is one of the most important parameters of industrial fuels which makes direct influence onto the design of the furnaces
In this paper we suggest the new approach to the pre-ignition processing of the fuel droplets by the high-power laser pulses [8,9,10]
The statistical distributions, typical travel distances for aerosol cloud, syngas weights and concentrations show the variation of key values for less than 5%
Summary
An ignition delay time is one of the most important parameters of industrial fuels which makes direct influence onto the design of the furnaces. In this paper we suggest the new approach to the pre-ignition processing of the fuel droplets by the high-power laser pulses [8,9,10] This leads to two main effects combined altogether: from the one hand, laser pulse initiates an additional fine atomization of the fuel droplet. It leads to partial gasification [11,12,13] of the fuel, producing the cloud of combustible gas around the initially injected fuel droplet Both these effects transform certain part of the fuel matter into the highly reactive state (micrometer scale particles and volatiles have much lower ignition delays times). All what is needed is a small side hole for laser beam input
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