I. Introduction he constant-pressure Brayton cycle has long been the thermodynamic cycle used in power generation and propulsion applications. The technological advancement in this domain has predominantly been at the component level than at the cycle level to an extent that the Brayton cycle and its associated components have been highly optimized. In pursuit of higher thermodynamic efficiency, the use of detonation cycles has been studied as an alternative to the Brayton cycle. In a detonation cycle (which is close to a constant volume cycle), the compression of gases occurs across a shock wave, which reduces the number of compressor stages required to generate high pressure in the cycle, as required in Brayton cycles. The additional work obtained with smaller pressure ratios (Fig. 1) makes the detonation cycle an attractive field of research. The improvement in efficiency using Pressure Gain Combustion (PCG) employing the detonation cycle, is expected to be 5% to 10% higher than any other technological advancement in power and propulsion cycles [1].