Flow Visualization inside a Rotating Detonation Engine near Injection Nozzles Using Point-Diffraction Interferometry

In this study, visualization of the detonation wave propagating inside a Rotating Detonation Rocket Engine (RDRE) by using a point-diffraction interferometry (PDI) was introduced. Firstly, in order to evaluate the applicability of the PDI, visualization of spherical shock wave and planer detonation waves has been carried out. Also, a modified PDI optical system is proposed for practical purpose. Secondary, detonation wave visualization inside a medium-sized RDRE will be conducted.