Abstract
A set of ignition and combustion test system of blasting fuse has been designed to study the transfer law of black powder combustion surface within the blasting fuse. The test system consists of metal bracket, thermometric infrared imager, igniter and blasting fuse to be tested. According to the experimental results, the average combustion velocity of the blasting fuse used in the test is 118 s/m or 0.0085m/s. Compared with the average combustion velocity, the combustion velocity of the blasting fuse is fluctuating during the flame transfer process, and the range of velocity variation is about 6.9%, which indicates the combustion velocity is relatively stable. The maximum surface imaging temperature of the blasting fuse combustion process is 255 ℃, which is far higher than the normal atmospheric temperature. In conclusion, an infrared thermal imager can clearly detect the migration process of the combustion surface inside the blasting fuse, and can accurately measure the linear velocity of the fuse combustion. Furthermore, the stability of the combustion process can be analyzed scientifically by the change of the linear velocity of blasting fuse in different time periods.
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