Abstract
This paper deals with the numerical simulation of 2D transonic flow through the SE1050 turbine blade cascade at various flow conditions. The first one concerns the design operation with a zero incidence angle involved in the ERCOFTAC Database CFD-QNET and the second one with a +20° incidence angle corresponding to an off-design operation. Advanced mathematical models with two different models of the bypass transition to turbulence were applied for the simulation of different regimes of transonic flows as well as with attached and separated flows. Transition models proposed by Dick et al. [1] and by Menter and Smirnov [2] are based on transport equations for the intermittency coefficient. Numerical results were compared with experimental data based on the optical and pressure measurements.
Highlights
Compressible flow in turbomachines belongs to most of the complicated tasks of fluid dynamics in practical applications
The presented numerical simulations are focused on the application of advanced mathematical models including the laminar/turbulent transition models for different regimes of transonic flows
The transonic flow through the turbine blade cascade SE1050 was investigated by two bypass transition models for design and off-design operations
Summary
Compressible flow in turbomachines belongs to most of the complicated tasks of fluid dynamics in practical applications. The experimental and numerical investigation of compressible flows in blade cascades is, central from a viewpoint of the basic research and technical applications. The aerodynamic research oriented to modeling flow processes in turbomachines should be more aimed to provide data on partial load and overload operation, namely of high loaded turbine stages. The typical turbine rotor blade cascade SE1050 has been investigated at various flow conditions in a wide range of Mach numbers and incidence angles including high positive and negative values (Šťastný and Šafařík [3, 4]). The presented numerical simulations are focused on the application of advanced mathematical models including the laminar/turbulent transition models for different regimes of transonic flows. Some additional experiments were carried out for extreme values of incidence covering the range from very small loading to overloading conditions
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