Browse > Article
http://dx.doi.org/10.12989/aas.2015.2.4.427

Influence of partial accommodation coefficients on the aerodynamic parameters of an airfoil in hypersonic, rarefied flow  

Zuppardi, Gennaro (Department of Industrial Engineering, University of Naples "Federico II")
Publication Information
Advances in aircraft and spacecraft science / v.2, no.4, 2015 , pp. 427-443 More about this Journal
Abstract
The present paper is the follow-on of a former work in which the influence of the gas-surface interaction models was evaluated on the aerodynamic coefficients of an aero-space-plane and on a section of its wing. The models by Maxwell and by Cercignani-Lampis-Lord were compared by means of Direct Simulation Monte Carlo (DSMC) codes. In that paper the diffusive, fully accommodated, semi-specular and specular accommodation coefficients were considered. The results pointed out that the influence of the interaction models, considering the above mentioned accommodation coefficients, is pretty strong while the Cercignani-Lampis-Lord and the Maxwell models are practically equivalent. In the present paper, the comparison of the same models is carried out considering the dependence of the accommodation coefficients on the angle of incidence (or partial accommodation coefficients). More specifically, the normal and the tangential momentum partial accommodation coefficients, obtained experimentally by Knetchel and Pitts, have been implemented. Computer tests on a NACA-0012 airfoil have been carried out by the DSMC code DS2V-64 bits. The airfoil, of 2 m chord, has been tested both in clean and flapped configurations. The simulated conditions were those at an altitude of 100 km where the airfoil is in transitional regime. The results confirmed that the two interaction models are practically equivalent and verified that the use of the Knetchel and Pitts coefficients involves results very close to those computed considering a diffusive, fully accommodated interaction both in clean and flapped configurations.
Keywords
gas-surface interaction models; partial accommodation coefficients; direct simulation Monte Carlo method; airfoil aerodynamic coefficients in hypersonic; rarefied regime;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Bird, G.A. (1998), Molecular Gas Dynamics and Direct Simulation Monte Carlo, Clarendon Press, Oxford, Great Britain.
2 Bird, G.A. (2004), "The DS2V/3V program suite for DSMC calculations", Proceedings of the 24th International Symposium on Rarafied Gas Dynamics, edited by M. Capitelli, Monopoli, Italy, July.
3 Bird, G.A. (2005), The DS2V Program User's Guide Ver. 3.2, G.A.B. Consulting Pty Ltd, Sydney, Australia.
4 Bird, G.A. (2006), "Sophisticated versus simple DSMC", Proceedings of the 25th International Symposium on Rarefied Gas Dynamics, Saint Petersburg, Russia, July.
5 Bird, G.A., Gallis, M.A., Torczynski, J.R. and Rader, D.J. (2009), "Accuracy and efficiency of the sophisticated direct simulation Monte Carlo algorithm for simulating noncontinuum gas flow", Phys. Fluid., 21, 017103.   DOI
6 Bird, G.A. (2013), The DSMC Method, Version 1.1, Amazon, ISBS 9781492112907, Charleston, USA.
7 Collins, F.G. and Knox, E.C. (1994), "Parameters of nocilla gas/surface interaction model from measured acommodation coefficients", AIAA J., 32 (4), pp 765-773.   DOI
8 Gallis, M.A., Torczynski, J.R., Rader, D.J. and Bird, G.A. (2009), "Convergence behavior of a new DSMC algorithm", J. Comput. Phys. 228, 4532-4548.   DOI
9 Gupta, R.N., Yos, J.M. and Thompson, R.A. (1989), A Review of Reaction Rates and Thermodynamic Transport Properties for an 11-Species Air Model for Chemical and Thermal Non-Equilibrium Calculations to 30,000 K, NASA TM 101528.
10 Knechtel, E.D. and Pitts, W.C. (1973), "Normal and tangential momentum accommodation for Earth satellite conditions", Acta Astronautica, 18(3), 171-184.
11 Lord, R.G. (1991), "Some extensions to the Cercignani-Lampis gas-surface. scattering kernel", Phys. Fluids A3(4), 706-710.
12 Nocilla, S. (1962), "The surface re-emission law in free molecule flow", Proceedings of the 3rd International Symposium on Rarefied Gas Dynamics, Paris, France, June.
13 Moss J.N. (1995), Rarefied Flows of Planetary Entry Capsules, Special course on "Capsule Aerothermodynamics", Rhode-Saint-Genese, Belgium, AGARD-R-808, 95-129, May.
14 Schamberg, R. (1959a), A New Analytical Representation of Surface Interaction for Hyper-thermal Free Molecule Flow, Rand Corp., RM-2313, Santa Monica, CA, USA
15 Schamberg, R. (1959b), Analytic Representation of Surface Interaction for Free Molecular Flow with Application to Drag of Various Bodies, Aerodynamics of the Upper Atmosphere, Rand Corp., R-339, Santa Monica, CA, USA.
16 Shen, C. (2005), Rarefied Gas Dynamic: Fundamentals, Simulations and Micro Flows, Springer-Verlag, Berlin, Germany.
17 Zuppardi, G., Morsa, L., Savino, R., Sippel, M. and Schwanekamp, T. (2015), "Rarefied aerodynamic characteristics of aero-space-planes: a comparative study of two gas-surface interaction models", Eur. J. Mech. B/Fluid.., 53, 37-47.   DOI