Parametric Study of Confined Turbulent Impinging Slot Jets upon a Flat Plate

Authors: A. M. Tahsini, S. Tadayon Mousavi

Abstract:

In the present paper, a numerical investigation has been carried out to classify and clarify the effects of paramount parameters on turbulent impinging slot jets. The effects of nozzle-s exit turbulent intensity, distance between nozzle and impinging plate are studied at Reynolds number 5000 and 20000. In addition, the effect of Mach number that is varied between 0.3-0.8 at a constant Reynolds number 133000 is investigated to elucidate the effect of compressibility in impinging jet upon a flat plate. The wall that is located at the same level with nozzle-s exit confines the flow. A compressible finite volume solver is implemented for simulation the flow behavior. One equation Spalart-Allmaras turbulent model is used to simulate turbulent flow at this study. Assessment of the Spalart-Allmaras turbulent model at high nozzle to plate distance, and giving enough insights to characterize the effect of Mach number at high Reynolds number for the complex impinging jet flow are the remarkable results of this study.

Keywords: Impinging jet, Numerical simulation, Turbulence.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1330981

References:

[1] R.Viskanta,"Heat transfer to impinging isothermal gas and flame jets," Experimental Thermal and Fluid Science, vol. 6, pp.111-134, 1993.
[2] R. Gardon, J.C. Akfirat, "The role of turbulence in determining the heat transfer characteristics of impinging jets," International Journal of Heat and Mass Transfer, vol. 8, pp. 1261-1272, 1965.
[3] E. Baydar, "Confined impinging air jet at low Reynolds numbers," Experimental Thermal an Fluid Science, vol.19, pp.27-33, 1999.
[4] M. Behnia, S. Parneix, Y. Shabany, P.A. Durbin, "Numerical study of turbulent heat transfer in confined and unconfined impinging jets," International Journal of Heat and Fluid Flow, vol.20, pp.1-9, 1999.
[5] T.H. Park, H.G. Choi, J.Y. Yoo, S.J. Kim, "Streamline upwind numerical simulation of two-dimensional confined impinging slot jets," International Journal of Heat and Mass Transfer, vol.46, pp.251-262, 2003.
[6] T.S. O-Donovan, D.B. Murray, " Jet impingement heat transfer-Part I: Mean and root-mean-square heat transfer and velocity distribution," International Journal of Heat and Mass Transfer, vol. 50, pp. 3291-3301, 2007.
[7] F. Beaubert, S. Viazzo, "Large eddy simulation of plane turbulent impinging jets at moderate Reynolds numbers," International Journal of Heat and Fluid Flow, vol. 24, pp.512-519, 2003.
[8] S. Kubacki, E. Dick, "Simulation of plane impinging jets with k-ω based hybrid RANS/LES models," International Journal of Heat and Fluid Flow, vol.31, pp.862-878, 2010.
[9] H. Hattori, Y. Nagano, " Direct numerical simulation of turbulent heat transfer in plane impinging jet," International Journal of Heat and Fluid Flow, vol. 25, pp. 749-758, 2004.
[10] J.E.Jaramillo, F.X. Trias, A.Gorobets, C.D. Perez-Segarra, A.Oliva, "DNS and RANS modeling of a turbulent plane impinging jet," International Journal of Heat and Mass Transfer, vol. 55, pp. 789-801, 2012.
[11] R.J. Goldstein, A.I. Behbahani, K. Kiger Heppelmann, " Streamwise distribution of the recovery factor and the local heat transfer coefficient to an impinging circular air jet," International Journal of Heat and Mass Transfer, vol. 29, pp.1227-1235, 1986.
[12] M.D. Limaye, R.P. Vedula, S.V. Prabhu, " Local heat transfer distribution on a flat plate impinged by a compressible round air jet," International Journal of Thermal Sciences, vol. 49, pp. 2157-2168, 2010.
[13] P.R. Spalart, S.R. Allmaras, " A one equation turbulence model for aerodynamic flows," La Recherche Aerospatiale, vol.1, pp. 5-21, 1994.
[14] Meng-Sing Liou, "A sequel to AUSM: ," Journal of Computational Physics, vol. 129, pp.364-382, 1996.
[15] S. Ashforth-Frost, K. Jambunathan, C.F. Whitney, "Velocity and turbulence characteristics of a semiconfined orthogonally impinging slot jet," Experimental Thermal Fluid Science, vol.14, pp.60-67, 1997.
[16] J. Zhe, V.Modi, "Near wall measurements for a turbulent impinging slot jet," Transactions of ASME, Journal of Fluid Engineering, vol.123, pp.112-120, 2001.