Design of finite element grids for the computation of the three-dimensional transonic flow around a wing

Ecer, A.; Citipitioglu, E.; Bhutta, Bilal A.

doi:10.2514/6.1982-1019

Cited by 3 publications

(4 citation statements)

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“…The basic objective of this work was to develop a methodology for analyzing large flow problems involving complex geometries, including: 1) the generation of a computational grid around a complex geometry based on a block-structured grid generation scheme, and o Experiment [5] • Present Fig. 9 Variation of pressure coefficients along the wing root for the wing-body problem.…”

Section: Discussionmentioning

confidence: 99%

“…The discrepancy between the two tests of results can be attributed to the coarseness of the grid around the leading edge of the wing profile which was studied in detail in Ref. 5. The number of iterations required for convergence in this case was 750 and involved a variable relaxation factor co in the range of 0.10-0.45.…”

Section: Transonic Flows Around a Wing-body Configurationmentioning

confidence: 96%

“…By using such numerical schemes, one can exploit the advantages of irregular, yet more efficient grids. 5 Also, for irregular grids, rather than employing point or line relaxation schemes, one has to employ block-relaxation schemes, since no regularity of the grid is assumed. Such schemes produce desirable convergence rates and are not affected by the occurrence of irregular grid structures.…”

Section: Introductionmentioning

confidence: 99%

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Block-structured solution scheme for analyzing three-dimensional transonic potential flows

Ecer

Spyropoulos

1987

AIAA Journal

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A block-structured solution scheme is developed for the analysis of three-dimensional transonic flows. The scheme is based on the solution of potential flow equations for individual blocks representing subvolumes of the flowfield. Based on a block-structured grid generation scheme, appropriate computational grids are generated for each of the blocks depending on the complexity of the local flowfield. The iterative scheme is designed to provide a solution of a large problem in terms of an assembly of smaller problems for each block. Numerical results illustrate the applicability of the method for analyzing flow around a NACA-0012 profile. Different block-structures are analyzed to demonstrate the robustness and the accuracy of the developed method. Finally, a three-dimensional wing-body configuration is analyzed and the results are compared with those obtained through experiments.

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Section: Discussionmentioning

confidence: 99%

Section: Transonic Flows Around a Wing-body Configurationmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Block-structured solution scheme for analyzing three-dimensional transonic potential flows

Ecer

Spyropoulos

1987

AIAA Journal

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“…The use of adaptive grids for modeling the shock region requires the treatment of artificial viscosity as a function of the mesh size [16]. For this, one has to first consider the proper artificial viscosity distribution for an irregularly spaced grid in the flow direction [7].…”

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confidence: 99%

Accuracy and Convergence Characteristics of Steady Transonic Potential Flow Solutions

Ecer

Yurtseven

Karaca

1984

Volume 1: Turbomachinery

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This paper discusses the importance of artificial viscosity in analyzing transonic potential flows in terms of: •convergence characteristics of a relaxation scheme, and •accuracy of the obtained solutions. In this first part of the paper, two types of relaxation schemes are discussed where different types of damping terms are employed. The utilization of artificial viscosity for these different procedures are studied. In the second part, the accuracy of solutions obtained by employing artificial viscosity is investigated, in particular for the solution around a shock. Finally, it is suggested that comparison of solutions with different levels of artificial viscosity may be an efficient tool in determining the accuracy of the obtained solution.

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A three-dimensional, block-structured finite element grid generationscheme

1985

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Design of finite element grids for the computation of the three-dimensional transonic flow around a wing

Cited by 3 publications

References 5 publications

Block-structured solution scheme for analyzing three-dimensional transonic potential flows

Block-structured solution scheme for analyzing three-dimensional transonic potential flows

Accuracy and Convergence Characteristics of Steady Transonic Potential Flow Solutions

A three-dimensional, block-structured finite element grid generationscheme

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