Granular solid propellants having high energy and fast burning rate produce great thrusts within extremely short time intervals. Using 2-phase fluid dynamics model among 1-dimensional 2-phase models, numerical program was set up to describe the reacting flow field with oscillating pressure waves. Results were compared with them of KIBC which is one of Lumped Sum Parameter Code. In this case, Heiney's pressure correction model of KIBC gave more reasonable results than Seigel's model. Constitutive laws for convective heat transfer coefficient and viscous drag force correlation need more considerations because some variations of their constants make a large influence on the results.
Using parabolized Navier-Stokes equations in a streamline coordinate system, the flow about an airfoil at wide range of angles of attack has been calculated. The equations are solved by the Coupled Equation Line Solver(CELS) in an H-type grid that has been generated for an arbitrary airfoil by successful conformal transformation. An anisotropic κ-ε model has been adopted for turbulence closure.