Optical diagnostics in a detonation-driven direct-connected circular combustor fueled with hydrogen for mach 10 scramjet

Various optical methods are applied to study flame characteristics of a circular-cross-section combustor for Mach 10 scramjet. Experiments performed on direct-connected test facility fueled by hydrogen and driven using hydrogen/oxygen detonation. The is advantageous in solving thermal inhomogeneity, corner boundary layer aircraft integration problems. However, it difficult use traditional measurement methods, which require large-sized windows. In this study, tunable diode laser spectroscopy multi-view imaging system used with small High repetition rate measurements allow the effective time facility, approximately 5 ms case, be obtained. dynamic diagnosed upstream downstream cavity with/without strut injection. When combined proper orthogonal decomposition obtain pulsation state during period, method expected engine performance evaluation numerical simulation verification. • Optical diagnosis scramjet circular cross section high number were carried out. different structures produced injection studied synchronous imaging. TDLAS determine working hydrogen-oxygen detonation platform. frequency investigated POD analysis.