scholarly journals A Quasi-Three-Dimensional Finite Element Solution for Steady Compressible Flow Through Turbomachines

1982 ◽  
Author(s):  
A. S. Ücer ◽  
İ. Yeġen ◽  
T. Durmaz
Keyword(s):  
Finite Element ◽  
Solution Method ◽  
Three Dimensional ◽  
Iterative Solution ◽  
Field Variable ◽  
Dimensional Solution ◽  
Subsonic Flows ◽  
Dimensional Finite Element ◽  
Flow Through ◽  
Three Dimensional Finite Element

A quasi-three-dimensional solution method is presented for subsonic flows through turbomachines of arbitrary geometry. Principal equations are based on Wu’s formulation of flow on blade-to-blade and hub-to-shroud surfaces, modified such that the same hub-to-shroud principal equation is used for all types of stream surfaces. Blade-to-blade surfaces are assumed to be surfaces of revolution. A stream function is used as the field variable. The problem is solved by finite element method. An iterative solution is used to find the quasi-three-dimensional solution. Solutions at hub, tip and mid height blade-to-blade surfaces are used to construct a mean hub-to-shroud surface and vice versa, until convergence is obtained. Results indicate that the developed technique is satisfactory for predicting the flow through turbomachine blades.

A Quasi-Three-Dimensional Finite Element Solution for Steady Compressible Flow Through Turbomachines

1983 ◽  
Vol 105 (3) ◽  
pp. 536-542 ◽  
Author(s):  
A. S. U¨cer ◽  
I˙. Yeg˙en ◽  
T. Durmaz
Keyword(s):  
Finite Element ◽  
Solution Method ◽  
Three Dimensional ◽  
Iterative Solution ◽  
Field Variable ◽  
Dimensional Solution ◽  
Subsonic Flows ◽  
Dimensional Finite Element ◽  
Flow Through ◽  
Three Dimensional Finite Element

A quasi-three-dimensional solution method is presented for subsonic flows through turbomachines of arbitrary geometry. Principal equations are based on Wu’s formulation of flow on blade-to-blade and hub-to-shroud surfaces, modified such that the same hub-to-shroud principal equation is used for all types of stream surfaces. Blade-to-blade surfaces are assumed to be surfaces of revolution. A stream function is used as the field variable. The problem is solved by finite element method. An iterative solution is used to find the quasi-three-dimensional solution. Solutions at hub, tip, and midheight blade-to-blade surfaces are used to construct a mean hub-to-shroud surface and vice versa, until convergence is obtained. Results indicate that the developed technique is satisfactory for predicting the flow through turbomachine blades.

Influence of the Blade Stacking on the Flow Through an Axial Flow Runner and Predictions of Three-Dimensional and Quasi Three-Dimensional Numerical Codes

1990 ◽  
Vol 204 (6) ◽  
pp. 389-397 ◽  
Author(s):  
G Ardizzon ◽  
G Pavesi
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Axial Flow ◽  
Pressure Gradients ◽  
Trailing Edge ◽  
Dimensional Finite Element ◽  
Flow Through ◽  
Leading Edges ◽  
Three Dimensional Finite Element

The influence of the stacking of the blade sections on the flow through an axial flow runner is investigated by means of quasi and three-dimensional finite element programs. The results show up higher pressure gradients close to the leading edges, in the sections near the hub, when the stacking point is displaced towards the trailing edge. These gradients become noticeable near the trailing edge when the stacking point moves towards the inlet, even if in an attenuated way these trends reverse in sections close to the shroud. The above-mentioned effects are highlighted only if three-dimensional codes or quasi three-dimensional codes with more than one hub-to-shroud surface are employed.

Finite Element Analysis of Nonuniformity of Tires with Imperfections5

2007 ◽  
Vol 35 (3) ◽  
pp. 226-238 ◽  
Author(s):  
K. M. Jeong ◽  
K. W. Kim ◽  
H. G. Beom ◽  
J. U. Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Radial Force ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Dimensional Finite Element ◽  
Force Variation ◽  
Three Dimensional Finite Element

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.

Sign in / Sign up

Export Citation Format

Share Document