A Three-Dimensional Navier-Stokes Calculation Applied to an Axial Compressor Rotor and Stator

Dring, R. P.; VanSeters, Ricky J.; Zacharias, Robert

doi:10.1115/93-gt-113

Cited by 3 publications

References 11 publications

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Multistage Simulation by an Adaptive Finite Element Approach Using Structured Grids

Sleiman

Tam

Robichaud

et al. 1999

Journal of Fluids Engineering

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This paper presents the application of a three-dimensional Navier-Stokes finite element code (NS3D) in the context of turbomachinery rotor-stator multistage interaction. A mixing-plane approach is used, in which boundary conditions at a common interface plane between adjacent blade rows are iteratively adjusted to yield a flow satisfying the continuity, momentum, and energy conservation equations, in an average sense. To further improve the solutions, a mesh adaptation technique then redistributes the mesh points of the structured grid within each component, according to an a posteriori edge-based error estimate based on the Hessian of the local flow solution. This matrix of second derivatives controls both the magnitude and direction of the required mesh movement at each node, is then implemented using an edge-based spring analogy. The methodology is demonstrated for two test cases with two types of data: a well-instrumented experimental large-scale rotating rig for a second stage compressor at UTRC and an actual engine. The latter, a two-stage compressor of a turboprop, has been only tested as a single-stage configuration, because of the quality of the experimental data available. All results compare well to the data and demonstrate the utility of the approach. In Particular, the mesh adaptation shows large improvements in agreement between the calculations and the experimental data.

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Multistage Simulation by an Adaptive Finite Element Approach Using Structured Grids

Sleiman

Tam

Robichaud

et al. 1999

Journal of Fluids Engineering

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Three‐Dimensional Thermo Fluid Analysis of Large Scale Electric Motor

Biswas

Ishizuka

Iwasaki

1999

International Journal of Rotating Machinery

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In the present work, the flow and temperature fields in large scale rotating electric motor are studied by solving the Navier-Stokes equations along with the temperature equation on the basis of finite difference method. All the equations are written in terms of relative velocity with respect to the rotating frame of reference. Generalized coordinate system is used so that sufficient grid resolution could be achieved in the body surface boundary layer region. Differential terms with respect to time are approximated by forward differences, diffusion terms are approximated by the implicit Euler form, convection terms in the Navier-Stokes equations are approximated by the third order upwind difference scheme. The results of calculation led to a good understanding of the flow behavior, namely, the rotating cavity flow in between the supporting bar of the motor, the flow stagnation and region of temperature rise due to flow stagnation, etc. Also the measured average temperature of the motor coil wall is predicted quite satisfactorily.

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