Influence of Wall Heat Effect on Gas Explosion and Its Propagation

The gas explosion process in pipes is often accompanied by an intense wall heat effect. A considerable part of the energy dissipated, and its propagationis affected. In order to study influence effect on propagation, numerical models with different adiabatic degrees were established ANSYS/LS-DYNA. propagation under was numerically simulated analyzed, thermal stress temperature distribution studied. results show that a decrease pipe insulation, increases, loss overpressurizationof shock wave, intensity, are significantly reduced. indicate can weaken propagation. At same time, it found initiation section greater than other positions pipe. With wall, decreases, difference between inner outer surfaces expands, total released increases. used compress unburned gas, resulting more reaction substantial increase explosive gas. Therefore, be seen has important condition higher combustion level low levels.