M. Stastny et al., FLOW AROUND THE SECTIONS OF ROTOR BLADING OF A TURBINE STAGE WITH RELATIVELY LONG BLADES AT OFF-DESIGN CONDITIONS, Proceedings of the Institution of Mechanical Engineers. Part A, Journal of power and energy, 211(3), 1997, pp. 207-213
The paper deals with the results of aerodynamic research of flow throu
gh blade cascades at off-design conditions. Variations of inlet veloci
ty vectors during the operation of the stage at off-design how conditi
ons are calculated and compared with experimental results. The detaile
d measurements provide data on aerodynamic parameters, kinetic energy
losses and flow structure. Leading edge flow separation occurs mainly
at off-design incidences and is proved to be the reason for the consid
erable kinetic energy loss increase. The occurrence of unsteady aerody
namic phenomena and forces at off-design performance of blade cascades
is shown. The transonic how structure is studied in detail and experi
mental data analysis and results of numerical calculations are present
ed.