Flow Field Analysis of a Synthetic Jet in the Presence of a Crossflow: Application of Different Turbulence Models

Authors

1 Iran University of Science and Technology

2 Ohio state university

Abstract

Synthetic jet is a novel means for various industrial applications and has received a lot of attention by researchers because of its small size and zero-net mass flux (ZNMF) characteristic. The aim of the present study is to investigate the flow field of the synthetic jet in the presence of the crossflow in order to gain a better understanding of the flow mechanism and also assessing high Reynolds turbulence models. For this purpose, three high Reynolds turbulence models (Realizable k-ε(RKE), RNG k-ε(RNG) and Standard k-ε(SKE)) are applied. The results show that contrary to Standard k-ε and Realizable k-ε turbulence model, RNG k-ε model is capable of capturing the vortical structures generated in the flow field. Furthermore, comparison of the normalized instantaneous velocity magnitude at the orifice exit confirmed that unlike the standard model, RNG and RKE showed a better prediction of relative maximum and minimum peaks in the suction cycle.

Keywords

Main Subjects

References

[1] Gordon M, Soria J (2002) PIV measurements of a zero-net-mass-flux jet in cross flow. Exp Fluids 33(6): 863-872.
[2] Smith BL, Glezer A (1998) The formation and evolution of synthetic jets. Phys Fluids 10(9): 2281-2297.
[3] Schaeffler N (2003) The interaction of a synthetic jet and a turbulent boundary layer. In 41st Aerospace Sciences Meeting and Exhibit (p. 643).
[4] Milanovic IM, Zaman KB (2005) Synthetic jets in cross-flow. AIAA J 43(5): 929-940.
[5] Gordon M, Cater JE, Soria J (2004) Investigation of the mean passive scalar field in zero-net-mass-flux jets in cross-flow using planar-laser-induced fluorescence. Phys Fluids 16(3): 794-808.
[6] Zhong S, Millet F, Wood NJ (2005) The behaviour of circular synthetic jets in a laminar boundary layer. Aeronaut J 109(1100): 461-470.
[7] Jabbal M, Zhong S (2008) The near wall effect of synthetic jets in a boundary layer. Int J Heat Fluid Fl 29(1): 119-130.
[8] Byrganhalli R, Mittal R, Najjar F (2004) Study of three-dimensional synthetic jet flowfields using direct-numerical simulation. In 42nd AIAA Aerospace Sciences Meeting and Exhibit (p. 91).
[9] Cui J, Agarwal R, Cary A (2003) Numerical simulation of the interaction of a synthetic jet with a turbulent boundary layer. In 33rd AIAA Fluid Dynamics Conference and Exhibit (p. 3458).
[10] Bazdidi-Tehrani F, Jahromi M (2011) Analysis of synthetic jet flow field: application of URANS approach. T Can Soc Mech Eng 35(3): 337-353.
[11] Yoo I, Lee S (2011) Three dimensional RANS computation using deforming mesh for synthetic jet simulation. In 49th AIAA aerospace sciences meeting including the New Horizons Forum and Aerospace Exposition (p. 942).
[12] Dandois J, Garnier E, Sagaut P (2006) Unsteady simulation of synthetic jet in a crossflow. AIAA J 44(2): 225-238.
[13] Milanovic I, Zaman K, Rumsey C (2005) An isolated circular synthetic jet in cross-flow at low momentum-flux ratio. In 43rd AIAA Aerospace Sciences Meeting and Exhibit (p. 1110).
[14] Boussinesq J (1897) Théorie de l'écoulmnent tourbillonnant et tumultuex des liquides dans les lits rectilignes à grande section (Vol. 1). Gauthier-Villars.
[15] Shih TH, Liou WW, Shabbir A, Yang Z, Zhu J (1995) A new k-ϵ eddy viscosity model for high reynolds number turbulent flows. Comput Fluids 24(3): 227-238.
[16] Yakhot VSASTBCG, Orszag SA, Thangam S, Gatski TB, Speziale CG (1992) Development of turbulence models for shear flows by a double expansion technique. Phys Fluids A-Fluid 4(7): 1510-1520.
Journal of Solid and Fluid Mechanics
Volume 8, Issue 4
January 2019
Pages 197-210

Files

Share

How to cite

Statistics