scholarly journals APPLICATION OF MULTIGRID METHOD TO THREE-DIMENSIONAL INCOMPRESSIBLE VISCOUS FLOW ANALYSIS AROUND SHELL ROOFS

2007 ◽  
Vol 72 (618) ◽  
pp. 135-142 ◽  
Author(s):  
Tomoshi MIYAMURA ◽  
Tomohiko KUMAGAI ◽  
Toshiyuki OGAWA ◽  
Shintaro OGATA ◽  
Makoto OHSAKI
Keyword(s):  
Viscous Flow ◽  
Multigrid Method ◽  
Flow Analysis ◽  
Three Dimensional ◽  
Incompressible Viscous Flow

Viscous Analysis of Three-Dimensional Rotor Flow Using a Multigrid Method

1994 ◽  
Vol 116 (3) ◽  
pp. 435-445 ◽  
Author(s):  
A. Arnone
Keyword(s):  
Multigrid Method ◽  
Flow Analysis ◽  
Three Dimensional ◽  
Maximum Flow ◽  
Variable Coefficients ◽  
Rotating Blade ◽  
A Cell ◽  
Space Discretization ◽  
Transonic Fan ◽  
Full Multigrid Method

A three-dimensional code for rotating blade-row flow analysis has been developed. The space discretization uses a cell-centered scheme with eigenvalue scaling for the artificial dissipation. The computational efficiency of a four-stage Runge–Kutta scheme is enhanced by using variable coefficients, implicit residual smoothing, and a full-multigrid method. An application is presented for the NASA rotor 67 transonic fan. Due to the blade stagger and twist, a zonal, nonperiodic H-type grid is used to minimize the mesh skewness. The calculation is validated by comparing it with experiments in the range from the maximum flow rate to a near-stall condition. A detailed study of the flow structure near peak efficiency and near stall is presented by means of pressure distribution and particle traces inside boundary layers.

Calculation of Three-Dimensional Viscous Flow in Hydrodynamic Torque Converters

1996 ◽  
Vol 118 (3) ◽  
pp. 578-589 ◽  
Author(s):  
H. Schulz ◽  
R. Greim ◽  
W. Volgmann
Keyword(s):  
Viscous Flow ◽  
Guide Vane ◽  
Three Dimensional ◽  
Simple Algorithm ◽  
Mass Conservation ◽  
Computer Code ◽  
Torque Converter ◽  
Turbine Rotor ◽  
Incompressible Viscous Flow ◽  
Vector Computers

A numerical method for calculating three-dimensional, steady or unsteady, incompressible, viscous flow is described. The conservation equations for mass and momentum and the equations of the k–ε turbulence model are solved with a finite volume method on nonorthogonal boundary-fitted grids. The method employs cell-centered variable arrangement and Cartesian velocity components. The SIMPLE algorithm is used to calculate the pressure and to enforce mass conservation. The computer code is vectorizable as far as possible to achieve an optimal performance on modern vector computers. Results of steady flow calculations in the guide vane, the pump rotor, and the turbine rotor and of the unsteady interaction simulation of the pump and the turbine of a one-stage one-phase non-automotive hydrodynamic torque converter are presented.

Three-Dimensional Flow Phenomena in a Transonic, High-Through-Flow, Axial-Flow Compressor Stage

1992 ◽  
Author(s):  
William W. Copenhaver ◽  
Chunill Hah ◽  
Steven L. Puterbaugh
Keyword(s):  
Flow Field ◽  
Viscous Flow ◽  
Numerical Technique ◽  
Flow Analysis ◽  
Three Dimensional ◽  
Axial Flow ◽  
Compressor Stage ◽  
Complex Flow ◽  
Pressure Transducers ◽  
Through Flow

A detailed aerodynamic study of a transonic, high-through-flow, single stage compressor is presented. The compressor stage was comprised of a low-aspect-ratio rotor combined alternately with two different stator designs. Both experimental and numerical studies are conducted to understand the details of the complex flow field present in this stage. Aerodynamic measurements using high-frequency, Kulite pressure transducers and conventional probes are compared with results from a three-dimensional viscous flow analysis. A steady multiple blade row approach is used in the numerical technique to examine the detailed flow structure inside the rotor and the stator passages. The comparisons indicate that many flow field features are correctly captured by viscous flow analysis, and therefore unmeasured phenomena can be studied with some level of confidence.

scholarly journals Three-Dimensional Viscous Flow Analysis of Compressor Cascade Channels.

1993 ◽  
Vol 59 (561) ◽  
pp. 1524-1531
Author(s):  
Hidenori Yoshida ◽  
Takashi Kawashima ◽  
Keiji Sakagawa
Keyword(s):  
Viscous Flow ◽  
Flow Analysis ◽  
Three Dimensional ◽  
Compressor Cascade
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