Author/Authors :
Sheha, A. A. A Petrogulfmisr Petroleum Company, Cairo, Egypt , Nasr, M Alexandria Higher Institute of Engineering and Technology (AIET), Alexandria, Egypt , Hosien, M. A Mechanical Power Engineering Department - Faculty of Engineering - Menoufia University, Shebin El-Kom Egypt , Wahba, E. M Mechanical Power Engineering Department - Faculty of Engineering - Menoufia University, Shebin El-Kom Egypt
Abstract :
The effect of operational and geometrical parameters on the jet pump efficiency were determined
experimentally and numerically. Numerical investigation was held firstly to determine the effect of diffuser
angle, mixing chamber length, pump area ratio and driving nozzle position on the efficiency of jet pump.
Commercial computational fluid dynamics (CFD) solver ANSYS FLUENT R 15.0 using SST-turbulence
model was used. The numerical results showed that jet pump efficiency increases with decreasing both of
diffuser angles and mixing chamber length up to a certain value and then pump efficiency decreases. Also, jet
pump efficiency increases with increasing pump area ratio up to a certain value and then pump efficiency
decreases. It was found that maximum numerical efficiency is 37.8 % for pump area ratio of 0.271. In
addition, the numerical results showed that the optimum relative length of mixing chamber is 5.48 and the
optimum value for diffuser angle at which the efficiency is a maximum value is 5º. Experimental tests were
conducted to obtain the effects of various operational and geometrical parameters on the performance of the
jet pumps. A test rig was constructed using the optimum design from the numerical results. The CFD’s results
were found to agree well with actual values obtained from the experimental results.
Keywords :
Operational parameters , Geometrical parameters , CFD; Pump efficiency , Jet pump
