A Navier-Stokes Analysis of Three-Dimensional Turbulent Flows Inside Turbine Blade Rows at Design and Off-Design Conditions

Hah, Chunill

doi:10.1115/1.3239582

Cited by 97 publications

(56 citation statements)

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“…where the present calculated results are compared with the previous experiment (Langston et al 1977) and calculations (Hah (1984), Yoo and Yun (1994), and Chan and Sheedy (1990)). Although the present calculation showed a larger total loss than Yoo and Yun (1994) in the wake region, the losses are in general predicted more accurately within the blade passage (i.e., the region, where C ax`1 ).…”

Section: Case Without Tip Clearancementioning

confidence: 82%

Numerical simulation of turbulent cascade flows involving high turning angles

Lee

Yoo

1997

Computational Mechanics

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Numerical simulations of three dimensional turbulent incompressible¯ows through linear cascades of turbine rotor blades with high turning angles have been performed using a generalized k-e model which is a high Reynolds number form and derived by RNG (renormalized group) method to account for the variation of the rate of strain. The convective terms are approximated by using a second order upwind scheme to suppress numerical diffusion. Boundary-®tted coordinates are adopted to represent the complex cascade geometry accurately. For

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Section: Case Without Tip Clearancementioning

confidence: 82%

Numerical simulation of turbulent cascade flows involving high turning angles

Lee

Yoo

1997

Computational Mechanics

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“…The three-dimensional, unsteady, Reynoldsaveraged Navier-Stokes equations can be written for a rotating blade passage in conservative form in a cylindrical coordinate system (z, r, 0) as in which, p is density, p is pressure, H is the rotational enthalpy, and w,u,v are three velocity components along z, r, 0 directions respectively, rij(i, j = z, r, 8) are nine components of viscous stress tensor, qi(i = z,r, 8) are heat fluxes at three directions. Turbulent viscosity coefficient are computed by using the mixing length model of Baldwin and Lomax (1978).…”

Section: Governing Equations and Numeri-cal M E T H O Dmentioning

confidence: 99%

“…However the flow mechanism inside turbomachinery, especially for a transonic flow, is still not clear. While Computational Fluid Dynamics (CFD) is playing a more and more important role for the simulation of flow nature inside turbomachinery (Hah 1984, Dawes 1988, Huang et al 1992, Guo et al 1995).…”

Section: Introductionmentioning

confidence: 97%

Topology method for analyses of 3-D viscous flow structure in transonic turbomachinery

1997

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A topology method is presented in this paper to reveal flow structure occurring inside turbomachinery, in which near wall flow structure is revealed by using wall limiting streamlines and space flow feature is revealed by using space streamlines and cross-section streamlines. As an example, a computational three-dimensional viscous flow field inside a transonic turbine cascade is studied. Through the analysis, the form and evolution of vortex system and the whole process of separation occurring within this cascade are revealed. The application of topology method for analyze flow structure inside turbomachinery is very important for understanding flow features and mechanism of flow loss even for improving the design of turbomachinery and increasing its efficiency.

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“…Some of the relevant studies have been conducted. For example, Hah (1984) had performed the three-dimensional incompressible¯ow analysis in off-design conditions. Stastny et al (1997) recently performed a two-dimensional numerical procedure to simulate a blade cascade compressible¯ow at off-design cases.…”

Section: Introductionmentioning

confidence: 99%

Flux-splitting finite volume method for turbine flow and heat transfer analysis

Amano

2001

Computational Mechanics

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A novel numerical method was developed to deal with the¯ow and heat transfer in a turbine cascade at both design and off-design conditions. The Navier±Stokes equations are discretized and integrated in a coupled manner. In the present method a time-marching scheme was employed along with the time-integration approach. The¯ux terms are discretized based on a cell ®nite volume formulation as well as a¯ux-difference splitting. The¯ux-difference splitting makes the scheme rapid convergence and the ®nite volume technique ensure the governing equations for the conservation of mass, momentum and energy. A hybrid difference scheme for quasi-threedimensional procedure based on the discretized and integrated Navier±Stokes equations was incorporated in the code. The numerical method possesses the positive features of the explicit and implicit algorithms which provide a rapid convergence process and have a less stability constraint. The computed results were compared with other numerical studies and experimental data. The comparisons showed fairly good agreement with experiments.

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A Navier-Stokes Analysis of Three-Dimensional Turbulent Flows Inside Turbine Blade Rows at Design and Off-Design Conditions

Cited by 97 publications

References 0 publications

Numerical simulation of turbulent cascade flows involving high turning angles

Numerical simulation of turbulent cascade flows involving high turning angles

Topology method for analyses of 3-D viscous flow structure in transonic turbomachinery

Flux-splitting finite volume method for turbine flow and heat transfer analysis

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