الفهرس | Only 14 pages are availabe for public view |
Abstract The study presents in details, experimental and numerical studies on the effect of geometrical and operational parameters on the efficiency of axial-water jet pumps. Numerical investigation is held firstly to determine the effect of geometrical and operational parameters such as diffuser angle, mixing chamber length, pump area ratio and driving nozzle position on the efficiency of jet pumps for thirty five axial jet pump numerical test cases, using a commercial computational fluid dynamics (CFD) solver ANSYS FLUENT. SST-turbulence model is used. To verify the numerical model, the results obtained are compared with the previous numerical and experimental results. The geometric parameters of axial jet pump examined in the present study are three geometrical parameters including area ratios: 0.075, 0.108, 0.169, 0.271 and 0.331, mixing chamber lengths: 50 mm, 75 mm, 100 mm, 121 mm, 170 mm, 190 mm, 200 mm, 230 mm, 250 mm, 270 mm, 310 mm and 350 mm and diffuser angles: 2.5°, 3°, 4°, 5°, 7.6°, 8° and 9°. While the operation parameters investigated here are relative positions of driving nozzle: 0, 1, 1.87 and 2 and inflow conditions. The experimental setup is designed and constructed in the fluid mechanics laboratory of the faculty of engineering, Menoufiya University to obtain the experimental data. The measurements have been performed on the optimum design obtained from numerical investigation. |