Performance of an air-air ejector: an attempt at numerical modelling

• Autorzy: Sobieski W.
• Języki publikacji: EN

Abstrakty

EN

The paper describes a numerical attempt to model the operation of an air-air ejector by means of a commercial numerical code. The obtained results are compared with the results of a laboratory experiment - particularly in relation to the diffuser of the modelled ejector. The substantial discrepancies between the performance characteristics obtained in the laboratory experiment and by numerical modelling are interpreted as a result of the absence of appropriate models of turbulence and mixing in the numerical code used. The paper also presents additional numerical simulations that emphasize the importance of unsteady phenomena (bifurcations of working fluid jet, turbulent mixing at the boundary of components) in the modelling of ejector equipment.

Słowa kluczowe

EN

fluid mechanics; ejectors; numerical calcutation

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 2003
• Tom: Vol. 7, No 3
• Strony: 449--457
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Sobieski W.

• University of Warmia and Mazury, Division of Mechanics and Machinery Construction, Oczapowskiego 11, 10-736 Olsztyn, Poland

• University of Warmia and Mazury, Division of Mechanics and Machinery Construction, Oczapowskiego 11, 10-736 Olsztyn, Poland,

Bibliografia

• [1] Werszko D and Goliszek A 1984 Works of the Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Gdansk,8741 (in Polish)
• [2] Golinski J and Troskolański A 1979 Ejectors, WNT, Warsaw (in Polish)
• [3] Badur J and Sobieski W 2001 Research of the Chair of Mechanics and Bases of Machinery Constrution, Olsztyn, Poland, pp. 63–98 (in Polish)
• [4] Sobieski W 2002 Mixing and Cavitation Phenomena Modelling in Gas-Fluid Ejectors, PhDThesis, Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Gdansk, Poland(in Polish)
• [5] Badur J and Sobieski W 2000 Fluid Dynamics 2000, Prague, Czech Republic, pp. 3–4
• [6] Kudryński A W, Rusanow A W and Jerszow S W 1997 Proc. Int. Sc. Conf. “Mathematicaland Physical Modelling Methods for Development of Turbines”, Kharkov, no pagination (inRussian)
• [7] Roshko A 1976AIAA Journal14(10) 1349