Time marching computation of unsteady flow, with application to acoustic resonance phenomena

• Main Author: Munezvenyu, P.
• Published: Swansea University 1980
• Subjects: 620.106
• Online Access: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638278

A numerical model was developed to compute the unsteady flow of a compressible fluid using time-marching. The turbulence viscosity was defined in terms of the turbulence kinetic energy and the rate at which this kinetic energy was dissipated. The model was applied to a two-dimensional passage containing a flat plate. Because of the coarse grid spacings (as compared to the vortex dimensions) used in the present work, the model did not simulate vortex shedding and therefore resonance excitations were not produced. But the resonances of interest were either identified from the dying away transients or from artificial excitations. Comparison of the results from numerical computations and experimental investigations is good. The model has demonstrated that dynamically correct time marching methods are practical for unsteady flow problems.