Burst Analysis Risk Mitigation of Explosion in Engines

Abstract

The event of simultaneous failures of safety mechanisms for a gas engine may lead to a situation where the gas pressure may built to a level that can lead to the bursting of the component. In gas engines, excessive pressure due to the combustion inside the chamber results in to the burst situation. So there is a requirement for gas explosion simulation to prove that the system is able to withstand the burst pressure.

Pressure at which the plastic energy is just above the elastic energy of the system is considered as the instability point. Elastic-Plastic approach of ASME and Ratio Plastic Work Curvature methods is used for this purpose. A bilinear elastic-plastic material properties is considered in FE Simulation, and maximum burst pressure bearing capacity in case of explosion in any one of the sub-systems is studied by Ratio Plastic Work Curvature (RPWC) method. RPWC method estimates the Plastic collapse load and the instability point at which the system / component will release the whole energy (Burst condition).