Prandtl-Meyer expansion wave

In the expansion wave, the flow velocity is increased and the pressure, density, and temperature are decreased along the stream line through the expansion fan. Since Oj > 02, it follows that Mi flow through an expansion wave is continuous and is accompanied by an isentropic change known as a Prandtl-Meyer expansion wave. The relationship between the deflection angle and the Mach number is represented by the Prandtl-Meyer expansion equation.l - l... 

The propagation of pressure waves such as acoustic wave, shock wave, and Prandtl-Meyer expansion through a gas-solid suspension is a phenomenon associated primarily with the transfer of momentum although certain processes of energy transfer such as kinetic energy dissipation and heat transfer between gas and solids almost always occur. Typical applications of the pressure wave propagation include the measurements of the solids concentration and flow rate by use of acoustic devices as well as detonation combustion such as in a rocket propellant combustor or in the barrel of a gun. 

Fig. 10.32 Diagram of the flow behind the detonation complex in a layer of a combustible mixture (a) [54] and the explosion products velocity field, (b) [55] 1 - combustible mixture 2 - noncombustible surrounding 3 - attached oblique wave 4 - contact surface between explosion products and surrounding interface 5 - fan of attached and reflected rarefaction waves (Prandtl-Meyer expansion fan)...

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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