[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5139/IJASS.2017.18.1.1

Prediction of Transonic Buffet Onset for a Supercritical Airfoil with Shock-Boundary Layer Interactions Using Navier-Stokes Solver

Chung, Injae (Agency for Defense Development)

Publication Information

International Journal of Aeronautical and Space Sciences / v.18, no.1, 2017 , pp. 1-7 More about this Journal

Abstract

To predict the transonic buffet onset for a supercritical airfoil with shock-boundary layer interactions, a practical steady approach has been proposed. In this study, it is assumed that the airfoil flow is steady even when buffet onset occurs. Steady Navier-Stokes computations are performed on the supercritical airfoil. Using the aerodynamic parameters calculated from Navier-Stokes solver, various steady approaches for predicting buffet onset are discussed. Among the various steady approaches considered in this study, Thomas' criterion based on Navier-Stokes computation has shown to be the most appropriate indicator of identifying the buffet onset for a supercritical airfoil with shock-boundary layer interactions. Good agreements have been obtained compared with the results of unsteady transonic wind tunnel tests. The present method is shown to be reliable and useful for transonic buffet onset for a supercritical airfoil with shock-boundary layer interactions in terms of practical engineering viewpoint.

Keywords

Transonic Buffet Onset; Shock-Boundary layer Interactions; Supercritical Airfoil; Thomas' Criterion;

Citations & Related Records

Reference

1	Van Leer, B., "Towards the Ultimate Conservative Difference Scheme. V. A Second Order Sequel to Godunov's Method", Journal of Computational Physics, Vol. 32, 1979, pp. 101-136 DOI
2	Baldwin, B. S. and Lomax, H., "Thin Layer Approximation and Algebraic Model for Separated Turbulent Flows", AIAA Paper 78-257, 1978.
3	Cook, P. H., McDonald, M. A. and Firman, M. C. P. M. C. P., "Aerofoil RAE2822 Pressure Distributions and Boundary Layer Wake Measurements", AGARD AR-138, 1979.
4	Garabedian, P. R. and Korn, D. G., "Analysis of Transonic Airfoils", Communications on Pure and Applied Mathematics, Vol. 24, No. 6, 1971, pp. 841-851. DOI
5	Pearcey, H. H. and Holder, D. W., "Simple Method for the Prediction of Wing Buffeting Resulting from Bubble Type Separation", NPL Aero Report 1024, 1962.
6	Chung, I., Lee, D., Reu, T. and Ko, D., "Prediction of Transonic Buffet Onset for Airfoils with Separation Bubble Using Steady Approaches", Journal of Aircraft, Vol. 40, No.4, 2003, pp. 795-797. DOI
7	Lee, B. H. and Ohman, L. H., "Unsteady Pressure and Force During Transonic Buffeting of a Supercritical Airfoil", Journal of Aircraft, Vol. 21, No. 6, 1984, pp. 439-441. DOI
8	Ohman, L. H., Kacprzynski, J. J. and Brown, D., "Some Results from Tests in the NAE High Reynolds Number Two- Dimensional Test Facility on Shockless and Other Airfoils", Canadian Aeronautical and Space Journal, Vol. 19, 1973, pp. 297-312.
9	Roe, P. L., "Approximate Riemann Solvers, Parameter Vectors, and Difference Schemes", Journal of Computational Physics, Vol. 43, No. 2, 1981, pp. 357-372. DOI
10	Pearcey, H. H., "A Method for the Prediction of the Onset of Buffeting and Other Separation Effects from Wind- Tunnel Tests on Rigid Models", AGARD Report 223, 1958.
11	Thomas, F., "The Determination of the Buffet Boundaries of Aerofoils in the Transonic Regimes", Aircraft Research Association Library Translation, No. 19, 1969.