Flow Characteristics of Mass Flow Amplifier with Various Geometrical Configurations Lee, Jeong-Min; Kang, Hyun-Su; Kim, Youn-Jea;
Mass flow amplifier, which is an aerodynamic device, makes air flow increased by ejecting small amount of compressed air with effect. In this study, the flow characteristics of a mass flow amplifier were studied with various flow conditions and geometrical configurations. In order to improve the performance of mass flow amplifier, various values of clearance, diffuser angle and the aspect ratio of induced flow inlet to outlet were considered as design parameter. Furthermore, four different pressure conditions of compressed air were also considered. Numerical study was performed using the commercial CFD code, ANSYS CFX 14.5 with shear stress transport(SST) turbulent model. The results of pressure and velocity distributions were graphically depicted with different geometrical configurations and operating conditions.
Mass Flow Amplifier; Effect;Venturi Effect;Clearance;Diffuser Angle;Aspect Ratio;CFD;
Natarajan, E. and Onubogu, N. O., 2012, "Application of Coanda effect in robots - a review," Mechanical Engineering and Technology, Advances in Intelligent and Soft Computing, Vol. 125, pp. 411-418.
Ha, J. S. and Shim, S. H., 2014, "Characteristic of Entrainment Flow Rate in a Coanda Nozzle with or without Coaxial contractor," Journal of the Korean Institute of Gas, Vol. 18, No. 2, pp. 21-27. (in Korean)
Mamou, M. and Khalid, M., 2007, "Steady and unsteady flow simulation of a combined jet flap and Coanda jet effects on a 2D airfoil aerodynamic performance," Revue des Energies Renouvelables CER, pp. 55-60.
Horn, P. E., 1996, "Air Amplifier Web Cleaning System," United States Patent 5490300.
Lee, D. W., Hwang, J. G., Kwon, Y. D., Kwon, S. B., Kim, G. Y., and Lee, D. E., 2007, "A study on the air knife flow with Coanda effect," Journal of Mechanical Science and Technology, Vol. 21, Issue. 12, pp. 2214-2220.
Fiser, J., Jedelsky, J., Vach, T., Forman, M., and Jicha, M., 2012, "Comparison of CFD simulations and measurements of flow affected by Coanda effect," EPJ Web of Conferences, Vol. 25, Id. 01015.
Blocken, B., van Hooff, T., Aanen, B., and Bronsema, B., 2011, "Computational analysis of the performance of a venturi-shaped roof for natural ventilation: Venturieffect versus wind-blocking effect," Computer & Fluids, Vol. 48, Issue. 1, pp. 202-213.
Gorjibandpy M. and Sangsereki M. K., 2010, "Computational Investigation of Air-Gas Venturi Mixer for Powered Bi-Fuel Diesel Engine," World Academy of Science, Engineering and Technology, Vol. 4., pp. 273-277.
Bashir, T. A., Soni, A. G., Mahulkar, A. V., and Aniruddha, B. P., 2011, "The CFD driven optimization of a modified Venturi for cavitational activity," The Canadian Journal of Chemical Engineering, Vol. 89, Issue. 6, pp. 1366-1375.