Numerical simulation of flowfield of helicopter rotor and fuselage in forward flight based on unstructured embedded grid technique

By using unstructured dynamic overset grids,we can obviate these two shortcomings,thus improving the efficiency and precision of numerical simulation.

Two-dimensional simulations about the separation of the interceptor missile shroud covers have been completed using moving multi-block chimera structure grid technique.

According to the observed field data of hydrology and sediment in Yalu River estuary,mathematical models with multiple nested grids of tidal current and sediment in estuary had been set up by using of MIKE 21 FM module,covering the area from Jiangqiao bridge in Dandong city to 6～7 m isobath.

Based on the international advanced model system——the Regional Atmospheric Modeling System (RAMS) and by means of new multi\|layer grid nesting technique, a multi-scale meteorology numerical forecasting model system has been finished, which can make simulation for regional and city\|scale systems synchronized or paralleled.

The complicated geometrical relations between the disk and the high-lift systems are solved by using chimera grid technique.

The influence of blade thickness and torsion on the flow field at low Reynolds number for rotor in a hover is studied with the Chimera grid technique.

Failing to find details about chimera grid calculation in the open lecture, we researched and developed such details ourselves.