Industrial revolution and economic growth in any country is aided and abetted by effective defense research and development hand in hand with medical supremacy across the globe. Advent avionics system and advanced defense technology have sprung up from various nations further driving the need for hypersonic speed propulsion systems in transport or military applications. Pulse detonation systems may be an effective cure for such insolvency and may be used as an advanced highspeed propulsion system for various applications. The research work discusses the effect of cross-sections like cylinder, square and rectangle in achieving controlled detonation with supersonic velocity at exit and effective pressure for further expansion. The analysis resulted that the cylindrical cross-section with an orifice type blockage at three locations evenly spread throughout the length of the tube with 60 percent blockage ratio to be the most effective with maximum exit velocity of 2995.6 m/s and effective pressure of 10.5 bar for an injection pressure of 100 bar and velocity 0.15 m/s. An experimental model using cold flow was conducted to ratify the results from the numerical simulation and found to be similar with a differentiation of 14% due to the variation of the working fluid

Keywords: Cross-section, Deflagration to detonation transition, Kerosene, Optimization, Pulse detonation engine