An experimental study of suddenly expanded rectangular jet flow field

Effect of Mach number on Wall Pressure Flow Field for Area Ratio 2.56

“…The peak frequency is lower and the spectrum is narrower for a higher aspect ratio in the region near the step. Flow through a rectangular Passage which is expanded suddenly into another rectangular duct of larger Cross-sectional area has been studied experimentally with stagnation Pressures from 3.5 atmospheres to 1.25 atmospheres by Rathakrishnan et al [7]. The length to height ratio of the enlarged duct varied from 5.769 to 1.923 and three models with length to height ratios 5.769, 3.846, and 1.923 were studied.…”