ИСТИНА

Shock propagation through dusty gas takes place in wide array of problems, including such important topics as coal mine explosion safety and shock-impulse methods of powder coating. The key role is played by interaction of with local clouds of suspended particles. An interaction of a shock with cylindrical cloud of low-concentration quartz dust is studied in the present work. A model of equilibrium dust-gas mixture based on Euler’s equations [1] is used. Refraction and focusing processes of the incident shock are described. Two qualitatively different interaction patterns – internal and internal – depending on dust concentration in the cloud are found. A dependence of peak shock focusing point and focusing intensity on dust volume concentration in range from 0.01% to 0.15% is determined. With dust concentration increase, focusing point approaches the cloud edge and shifts into the cloud, while shock focusing intensity rises nonmonotonically.