Supersonic jets at design Mach number of 1.45 issuing from circular 30 deg and 60 deg double-beveled nozzles have been investigated experimentally and numerically in the present study, with a view to potentially improve mixing behavior. Reynolds-averaged Navier–Stokes (RANS) simulations of the double-beveled nozzles and a benchmark nonbeveled nozzle were performed at nozzle-pressure-ratios (NPR) between 2.8 and 5.0, and the results are observed to agree well with Schlieren visualizations obtained from a modified Z-type Schlieren system. Double-beveled nozzles are observed to produce shorter potential core lengths, modifications to the first shock cell lengths that are sensitive toward the NPR and jet half-widths that are typically wider and narrower along the trough-to-trough (TT) and peak-to-peak (PP) planes, respectively. Lastly, using double-beveled nozzles leads to significant mass flux ratios at NPR of 5.0, with a larger bevel-angle demonstrating higher entrainment levels.
Flow Characterization of Supersonic Jets Issuing From Double-Beveled Nozzles
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received November 3, 2017; final manuscript received May 27, 2018; published online June 27, 2018. Assoc. Editor: Moran Wang.
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Wu, J., Lim, H. D., Wei, X., New, T. H., and Cui, Y. D. (June 27, 2018). "Flow Characterization of Supersonic Jets Issuing From Double-Beveled Nozzles." ASME. J. Fluids Eng. January 2019; 141(1): 011202. https://doi.org/10.1115/1.4040447
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