This issue contains a report that summarizes the work to date on the removal of the boundary layer on a flat plate for use with Wing In Surface Effect Ship (WISES) model testing. A simple practical method is described which involves the use of a contraction and slot in order to suck the boundary layer from the plate. Theoretical aspects of the design are discussed with relation to the level of suction and the slot width. The boundary layer height was obtained through measurement of the mean velocity profile and a reduction of 50 percent was generally observed when suction was used. The effects on the forces on a low aspect-ratio wing were used to verify the technique for wing heights above 2.5 percent of the mean chord. Below this height separation of the boundary layer on the ground plate is thought to have altered the pressure distribution on the wing. The report is followed by technical memorandum on a new pulsating wind tunnel with a water tank.
Papers of Ship Research Institute, Vol. 32, No. 2, 1995
1995
75 pages
Report
No indication
English
Marine Engineering , Fluid Mechanics , Surface effect ships , Boundary layers , Wind tunnel tests , Flow visualization , Fluid dynamics , Ground effect(Aerodynamics) , Suction , Pressure effects , Leading edges , Naval architecture , Drag , Velocity distribution , Pressure distribution , Foreign technology , Wing In Surface Effect Ship , Ground plate