Investigation and enhancement of cut-paste algorithm in overlapping grid;

To solve the problem in generation of multi-element airfoil grids,the main characteristics and basic flow of the newly emerged cut-paste algorithm which generates overlapping grids by cutting and pasting hole fronts were investigated.

By the use of the overlapping grid technique and symmetric TVD scheme,the laminar flow N-S equation was solved and the flow field of lateral jet interaction for a missile-like wing-body configuration was simulated.

Among this ways, the overlap grid technology is a vive research aspect.

The spoiler moving relative to a stationary airfoil is treated by a dynamic overset grid method.

Then the overset relationship graph is brought forward to control the com-munication order of multi-level overset grids problem.

This technique simplifies the construction of computational grids about complex geometries and allows relative motion between embedded grids.

The flowfield for a rotor a blade in hover was computed using an improved dual time method by numerically solving the compressible Euler and Navier Stokes equations on embedded grids.