Experimental studies on structure of airblast spray in crossflow

摘要: The present investigation is focused on experimental studies the structure of airblast spray in crossflow. Atomizer at a higher pressure than ambient and gas expected to exhibit features generally found under-expanded jets. High-speed images are captured using shadowgraphy technique. Certain wave-like structures observed near-nozzle region attributed shock–vortex interactions, Proper Orthogonal Decomposition (POD) analysis has been carried out these images. POD mode shapes clearly show signatures oscillations frequencies close screeching frequency modes compared for different conditions significance dynamic their temporal behavior discussed. Finally, regime map also proposed characterize