Abstract
High-order accurate large-eddy simulation has been carried out for a compressible flow through a convergent-divergent nozzle with bell-shaped divergent portion. An explicit filtering using approximate deconvolution method is applied. The nozzle has isothermal wall and circular cross-section. The incoming flow is a turbulent, subsonic fully developed pipe flow at a Mach number of 0.4 and friction Reynolds number of 216. An adaptive filter is also used to stabilise the shocks. There is a smooth transition from subsonic flow to supersonic flow in the convergent section, reaching a Mach number of 1 at the throat. However, with the exit to inlet pressure ratio of 0.6 a shock train develops in the bell-shaped divergent section of the CD nozzle.
Published Version
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