organized by the Institute of Thermomechanics AS CR, v.v.i.,
every first Wednesday of the month at 10:00
in the Conference Room B in the main building of the Institute of Thermomechanics ASCR, v. v. i. (see directions)
 

Contact persons: Dr. Radek Kolman, Dr. Hanuš Seiner

 

Wednesday, February 4, 2015, 10:00
 

 

Abstract:  The lecture is focused on systematic aerodynamic research on the flow structures and flow parameters of tip section cascades at transonic and supersonic regimes of operation. The analysis of the flow is based on numerous detailed wind tunnel measurements of five tip blade cascades of different design. The blade cascades represent tip sections of the last stage rotor bladings with length of blades 860 mm, 1080 mm, 1220 mm, 1375 mm and 1525 mm.
              Aerodynamic experimental research of the tip blade cascades is oriented to providing data on high-speed flow of compressible fluid past tip sections of blades. The analysis of experimental data is aimed to transonic effects namely expansion over sonic conditions, aerodynamic choking, development of supersonic flow, boundary layer development, the flow past trailing edge, exit shock waves, interaction of shock wave with boundary layer, wakes, etc. 
                 Results of experiments are invaluable not only for improvements of new machine results but also for numerical modeling of transonic flow and numerical solution of flow in flow paths of turbomachines.