National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Numerické řešení subsonického a transsonického turbulentního proudění dvourozměrnými mřížemi
Kozel, Karel ; Louda, P. ; Příhoda, Jaromír
The work deals with the numerical solution of 2D steady turbulent subsonic and transonic flows through turbine cascades. The numerical solution is carried out by the finite volume method using an implicit AUSM scheme. The Reynolds averaged Navier-Stokes equations are closed by the eddy viscosity SST model and/or the explicit algebraic Reynolds stress model. Numerical results are compared with experimental data for two turbine blade cascades – SE1050 and NT24.
Some remarks to the flow in radial inflow turbine cascades of very low aspect ratio
Dvořák, Rudolf
Paper completes previous papers of the same author in suggesting methods of calculating secondary flow losses. It also suggests modification of the Reynolds number enabling correlation of data in low aspect ratio turbine cascades
Flow in a radial inflow turbine rotor cascade with a blade tip gap
Dvořák, Rudolf ; Červenka, Bystrik
Using numerical simulation (software NUMECA) flow in a radial inflow turbine rotor cascade with a 10% tip gap has been solved. Effects of secondary flows and flow through the tip gap on the flow structure has been investigated at 4 boundary layer thicknesses in the oncoming stream (0, 10%, 30%, 50% of the blade length). Greater boundary layer thickness decreases the aerodynamic load as well as effect of the tip gap, and secondary flows of the 2nd kind.

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