Numerical simulation and performance analysis of the linear clustered plug nozzles

To understand the effects of round to rectangle (RTR) cells, RTR cell obliquity and plug contours on plug nozzle performance and to select appropriate method for designing plug nozzle, a numerical program was developed by employing two-order non-oscillatory and non-free-parameters dissipative finite difference scheme (NND scheme) based on three-dimensional Reynolds averaged Navier-Stokes equations and low Reynolds number k-ε equations. The performance of RTR cells with different contour changing points, different contours after changing points and different exit arc radiuses was compared. Different parameters affecting the plug performance were presented. Some optimized results were concluded from comparison.