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Steady oblique shock waves are observed for the first time in non-ideal supersonic flows of single-phase organic vapors. A diamond-shaped airfoil with semi-aperture $$7.5^{\circ }$$ 7.5∘ at the leading edge and $$10^{\circ }$$ 10∘ at the trailing edge is placed within a uniform supersonic stream (Mach number $$M = 1.5$$ M=1.5 ) of siloxane fluid MDM (octamethyltrisiloxane, $$\hbox {C}_8\hbox {H}_{24}\hbox...
Supersonic expansions of a molecularly complex vapor occurring within the non-ideal thermodynamic region in the close proximity of liquid-vapor saturation curve were characterized experimentally for the first time. Results for two planar converging–diverging nozzles in the adapted regime and at different inlet conditions, from highly non-ideal to dilute gas state, are reported. Measurements of upstream...