BREAKAWAY FLOW AROUND GRIDS OF NONCIRCULAR TUBES.

On the basis of the discrete-vortex method, breakaway flow around a single-row assembly (grid) of tubes of square, rectangular, and triangular cross section is investigated. Grids consisting of plates are also considered. It is supposed that flow breakaway at these bodies occurs for tubes at points of discontinuity of the cross section and for plates at their sharp edges. The calculation results for the flow obtained by the discrete-vortex method are the initial data for determining the boundary layer at tube surfaces and the heat transfer between the tubes and the flow.