Experimental study of 70  Divergen Angle of  Diffuser   on Liquid Jet Gas Ejector

Daru Sugati; Eka Yawara

Daru Sugati STTNAS Yogyakarta
Eka Yawara STTNAS Yogyakarta

Abstract

Aim of this research is founded the effect of gas-liquid ratio on diffuser performance. Diffuser attached on end of throat of ejectors. Ejector employed water as a motive fluid and air as the entrained fluid. downward flow is direction of flow in the ejector . Ejector generated bubble flow from entrainment and mixing process in the throat section. Performance of diffuser was measured from pressure recovery value. Pressure recovery is differential pressure of upstream and down stream of diffuser divide by kinetic energy on the upstream diffuser. The result of the experimental is increasing of void fraction up to value 0.2, its became pressure recovery increase. Value of void fraction above 0.2, its became pressure recovery decrease.

Keywords: ejector, diffuser, pressure recovery, co-current flow, downward flow, two-phase flow

References

Brahim.A.B., Prevost.M., Bugarel.L., 1984, Momentum Transfer in Verical Down flow Liquid Jet Ejector : Case of Self Gas Aspiration and Emultion Flow, Int. J. Multiphase Flow Vol. 10, No. I, 79-94,

Kandakure, M.T., Gaikar, V.G., Patwardhan,A.W., 2005, Hydrodynamic aspects of ejectors, Chemical Engineering Science, 60, 6391 – 6402,

Kundu. G., Mukherjee.D., Mitra.A.K.,1995,

Experimental tudies on a o-current Gas-Liquid Dowflow Bubble Column., Int. J. Multiphase Flow, Vol. 21, No. 5, 893-906.

Majumder.S.K., Kundu.G., Mukherjee.D., 2006, Prediction of pressure drop in a modified gas–liquid downflowbubble column, Chemical Engineering Science 61, 4060 – 4070

Neve, R. S., 1991, Diffuser Performance in Two-Phase Jet Pumps. International Journal of Multiphase Flow, 17, 267-272.

Shimizu, Y., Nagafusa, M., Khuzuhara, S., 1982, Effect of Approching Flow Type on the Performance of Straight Conical Diffuser, Bullein JSME, 25(208), 1506-1512.

Thang, N.T., Davis,M.R, 1981, Pressure Distribution in Bubble Flow Through Venturis, International Journal of Multiphase Flow, 7, 191-210.