Determination of water collection on two- and three-dimensional aerodynamic surfaces in external two-phase flow in atmospheric conditions

• Autorzy: Sznajder R.

Identyfikatory

DOI

10.5604/12314005.1213554

• Języki publikacji: EN

Abstrakty

EN

Simulations of two-phase flow cases consisting of air and water dispersed in atmosphere were conducted using ANSYS FLUENT solver. The computational model was built with the aim of determination of zones of water droplets impinging on the investigated surface, which is a first step towards simulations of ice accretion in flow conditions where super cooled water is present as dispersed phase. It follows Eulerian approach, currently most effective approach for determination of distribution of water collection on two- and three-dimensional surfaces. Dispersed water is treated as continuous phase and its transport equations are being solved along with air flow equations in the whole computational domain. There are two specific factors of this two-phase flow problem. One of them is ratio of air and water density, which is a cause of existence of two time scales in obtaining a numerical solution of this problem: one for convergence of air flow solution and another for solution of flow of dispersed water in the computational domain. This required development of a specific strategy in obtaining a numerical solution in some circumstances important in aerodynamics, especially at high angle of attack with flow recirculation zones on the wing. The other factor is relatively low concentration of water droplets in conditions important for atmospheric icing. The consequence of this is possibility of uncoupling of solution for both phases and narrowing the solution of the phase of dispersed water to a small region of non-uniformity of velocities of the dispersed phase. Results for two objects: an airfoil and helicopter tail rotor blade, exploiting the developed computational strategy will be presented.

Słowa kluczowe

EN

flow simulations; aerodynamics; two-phase flow; simulation of ice accretion; aircraft engineering; transport; vehicles

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2016
• Tom: Vol. 23, No. 1
• Strony: 369--376
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Sznajder R.

• Institute of Aviation, Department of Aerodynamics Krakowska Avenue 110/114, 02-256 Warsaw, Poland tel.:[phone], ext. 492, fax: [phone]

Bibliografia

• [1] Hospers, J. M., Hoeijmakers, H. W. M., Numerical Simulation of SLD Ice Accretions, Proceedings of the 27th International Congress of the Aeronautical Sciences, 2010.
• [2] Beaugendre, H., Morency, F., Habashi, W.G., FESNSAP-ICE’s Three-Dimensional In-Flight Ice Accretion Module: ICE3D, Journal of Aircraft, Vol. 40, No. 2 2003.
• [3] Morrison, F. A., Data Correlation for Drag Coefficient for Sphere, Department of Chemical Engineering, Michigan Technological University, Houghton, MI, www.chem.mtu.edu/ /~fmorriso/DataCorrelationForSphereDrag2010.pdf.
• [4] ANSYS FLUENT UDF Manual, ANSYS, Inc. Southpointe 275, Technology Drive Canonsburg, PA 15317.
• [5] Fortin, G., Perron, J., Spinning Rotor Blade Tests in Icing Wind Tunnel, 1st AIAA Atmospheric and Space Environments Conference, AIAA 2009-4260, San Antonio, Texas 22-25 June 2009.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.