Numerical assessment of correlations for shock wave boundary layer interaction

Correlation for Length of Impinging Shock-Induced Large Separation Bubble at Hypersonic Speed

“…These include compression ramp/double wedge cases at supersonic [7] as well as hypersonic freestreams [3,8], supersonic impinging shock cases [9,10]; the separation length for a hypersonic double cone [11] was also found to follow a correlation similar to that proposed by Davis and Sturtevant [3] for double wedges. Recently, John and Kulkarni [12] analyzed the important correlations reported in the literature, by comparing their numerical data for compression corner for Mach numbers ranging from 5 to 11.63 (the correlation [10] for impinging shock case was also compared by suitably adapting the parameters); it was noted that the correlations were not universal. Further, none of the correlations address large separation bubbles.…”

Numerical Study on Wall Temperature Effects on Shock Wave/Turbulent Boundary-Layer Interaction

“…Marini [6] conducted experimental studies about the effects of ramp angle, wall temperature, and Mach number on the scale of separation bubble in shock wave/laminar boundary layer interaction (SLBLI), and then gave some empirical formulas, and these formulas were then assessed numerically by John and Kulkarni [7]. Compared with SLBLI, shock wave/turbulent boundary-layer interaction (STBLI) is more complicated and the study of STBLI is more novel.…”

Wall modeled large eddy simulation of supersonic flow physics over compression–expansion ramp

“…Bermejointeracting with the turbulent boundary layers developed inside a duct with an almost-square cross-section to investigate three-dimensional effects imposed by the lateral confinement of the flow. John and Kulkarni [28] reported correlations for prediction of the interaction of ramp induced shock and laminar boundary layer for various free streams and wall conditions portrayed their inabilities to incorporate the variations of influencing parameters while retaining the linearity. Clemens and Narayanaswamy [29] surveyed the low-frequency unsteadiness of STBLIs in which they found that, upstream boundary layer fluctuations seem to be an important source of disturbances, but the evidence suggests that their impact is reduced by increasing the size of the separated flow.…”