Compressibility Effects in High Speed Turbulent Shear Layers – Revisited

Internal regulation in compressible turbulent shear layers

“…All error bars presented in this study represent temporal variations from the average value in this self-similar regime. Examples of this collapse and temporal variability are demonstrated in Matsuno & Lele (2020). reduction occurs near M c ∼ 0.5, followed by an asymptotic approach to a normalized growth rateδ θ /δ inc ≈ 0.2.…”

“…They may correspond to acoustic response, but not rotational eddies. Figure 5(a) shows the ratio of correlation scales along x and y directions, δ x /δ y , and along the z and y directions, δ z /δ y against M c (a data processing error invalidates the corresponding plot in Matsuno & Lele (2020)). Note that these ratios are relatively constant (the M c = 2.0 point is an outlier since it may be affected by the smaller domain size in x).…”

Aerodynamic sound of turbulent time-developing shear layer as the outcome of the flow linear non-modal instability

“…The growth rate ratios ( δθ,0.7 / δθ,0.3 ) for different experimental and numerical studies are presented on the right plot in Figure 4. The blue filled circles correspond to the recent results for different Mach numbers by Matsuno and Lele (2020). The black filled circles represent different experimental and numerical results publishes in the literature (details for each points can be found in the literature, see, for example the papers by Pantano and Sarkar [39], Foysi and Sarkar [40], Matsuno and Lele [41] and references therein).…”

“…The blue filled circles correspond to the recent results for different Mach numbers by Matsuno and Lele (2020). The black filled circles represent different experimental and numerical results publishes in the literature (details for each points can be found in the literature, see, for example the papers by Pantano and Sarkar [39], Foysi and Sarkar [40], Matsuno and Lele [41] and references therein). As one can see the growth rate ratios of our simulations (red open circles) are in good agreement with those available in the literature.…”

“…FIG.4: Left plot: Growth rates vs. simulation box ratios for M c = 0.3, 0.7, red and black points correspondingly; Right plot: Growth rate ratios from the different experimental and numerical studies of the flow in terms of convective Mach number. Black circles, see Pantano and Sarkar[39], Foysi and Sarkar[40], Matsuno and Lele[41] for references and details. The blue circles correspond to the recent results of Matsuno and Lele (2020)[41].…”