Numerical analysis of three-dimensional flow past a high-speed electric train with turbulent boundary layer separation

1994 ◽  
Vol 28 (5) ◽  
pp. 660-666
Author(s):  
A. G. Zakharov ◽  
V. E. Kovalev ◽  
S. F. Konovalov
Keyword(s):  
Boundary Layer ◽  
Numerical Analysis ◽  
Turbulent Boundary Layer ◽  
High Speed ◽  
Three Dimensional ◽  
Boundary Layer Separation ◽  
Three Dimensional Flow ◽  
Dimensional Flow ◽  
Flow Past ◽  
Electric Train

Using Sweep and Dihedral to Control Three-Dimensional Flow in Transonic Stators of Axial Compressors

2000 ◽  
Vol 123 (1) ◽  
pp. 40-48 ◽  
Author(s):  
V. Gu¨mmer ◽  
U. Wenger ◽  
H.-P. Kau,
Keyword(s):  
Numerical Analysis ◽  
High Speed ◽  
Three Dimensional ◽  
Navier Stokes ◽  
Three Dimensional Flow ◽  
Axial Compressors ◽  
Transonic Compressor ◽  
Dimensional Flow ◽  
Boundary Layer Development ◽  
Radial Loading

The paper describes an advanced three-dimensional blading concept for highly loaded transonic compressor stators. The concept takes advantage of the aerodynamic effects of sweep and dihedral. To the knowledge of the authors this is the first approach reported in the open literature that combines those two basic types of lean in an engine-worthy aerofoil design. The paper makes a contribution to the understanding of the endwall effect of both features with special emphasis put on sweep. The advanced three-dimensional blading concept was applied to an Engine Section Stator (ESS) of an aero-engine fan. In order to demonstrate how three-dimensional flow can be controlled, numerical analysis of the flow structure in a conventional and an advanced stator configuration was performed using a three-dimensional Navier–Stokes solver. The numerical analysis showed the advanced blade improving both radial loading distribution and the three-dimensional endwall boundary layer development. In particular, a strong hub corner stall could be largely alleviated. High-speed rig testing of the advanced ESS confirmed the concept and showed good qualitative agreement between measurement and prediction. The work presented was closely linked to the development of the BR710 engine on which the advanced ESS is in service today.

Using Sweep and Dihedral to Control Three-Dimensional Flow in Transonic Stators of Axial Compressors

2000 ◽  
Author(s):  
V. Gümmer ◽  
U. Wenger ◽  
H.-P. Kau
Keyword(s):  
Numerical Analysis ◽  
High Speed ◽  
Three Dimensional ◽  
Navier Stokes ◽  
Three Dimensional Flow ◽  
Axial Compressors ◽  
Transonic Compressor ◽  
Dimensional Flow ◽  
Boundary Layer Development ◽  
Radial Loading

The paper describes an advanced 3D blading concept for highly-loaded transonic compressor stators. The concept takes advantage of the aerodynamic effects of sweep and dihedral. To the knowledge of the authors this is the first approach reported in open literature that combines those two basic types of lean in an engine-worthy aerofoil design. The paper makes a contribution to the understanding of the endwall effect of both features with special emphasis put on sweep. The advanced 3D blading concept was applied to an Engine Section Stator (ESS) of an aero-engine fan. In order to demonstrate how three-dimensional flow can be controlled, numerical analysis of the flow structure in a conventional and an advanced stator configuration was performed using a 3D-Navier-Stokes solver. The numerical analysis showed the advanced blade improving the radial loading distribution as well as the three-dimensional endwall boundary layer development. In particular a strong hub corner stall could be largely alleviated. High-speed rig testing of the advanced ESS confirmed the concept and showed good qualitative agreement between measurement and prediction. The work presented was closely linked to the development the BR710 engine on which the advanced ESS is in service today.

Three-dimensional flow past two stationary side-by-side circular cylinders

2022 ◽  
Vol 244 ◽  
pp. 110379
Author(s):  
Weilin Chen ◽  
Chunning Ji ◽  
Md. Mahbub Alam ◽  
Yuhao Yan
Keyword(s):  
Three Dimensional ◽  
Circular Cylinders ◽  
Three Dimensional Flow ◽  
Dimensional Flow ◽  
Flow Past
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