A preliminary study of combustion-augmented laser-ramjets was conducted, in which chemical propellant such as a
gaseous hydrogen/air mixture was utilized and detonated with a focused laser beam in order to obtain a higher impulse
compared to the case only using lasers. CFD analysis of internal conical-nozzle flows and experimental measurements
including impulse measurement were conducted to evaluate effects of chemical reaction on thrust performance
improvement. From the results, a significant improvement in the thrust performances was confirmed with addition of a
small amount of hydrogen to propellant air, or in combustion-augmented operation.