چكيده به لاتين
Abstract:
Slurry transportation is widely used in most industries such as oil & gas industries, mining industries and petrochemical industries. Most industries use slurry pump for slurry transportation but complexity and costly of this pump cause that some industries transport soft particle by using non-slurry (water) centrifugal pump. In this thesis a centrifugal pump with slurry flow (soft solid - water) was experimentally studied and effects of concentration, density and diameter of soft solid particle (soft sand and Activated carbon) were investigated. The experimental results show that by increasing density, concentration and size of the particle, pump head decreases and power consumption increases dramatically and as a result efficiency of pump reduces. Also it was observed that at pressure side of the blade especially in outlet of it discoloration is more than suction side and it was increased by increasing the solid concentration. In the following centrifugal pump with slurry flow was investigated numerically by using finite volume method and Eulerian-Eulerian model and the results are compared with and verified by experimental results. The numerical results show that effects of increasing concentration, density and diameter of solid particle are same as experimental results. Also numerical results depict that solid concentration in pressure side is more than suction side of the blade. Finally in order to increase the head and efficiency of centrifugal pump with slurry, flow shape of the pump impeller is optimized by using artificial neural network (ANN) and eagle strategy. The parameters of impeller that are optimized are hub diameter, suction diameter, impeller diameter, impeller width and inlet and outlet blade angles. Optimization results show that efficiency and head of the pump are improved by 3.33% and 3.85 (m). Also it is observed that the static pressure contour of optimized pump is improved about cavitation and its solid concentration contour distributed uniformly and by lower concentration rather than initial pump.
Keywords: Two Phase (slurry), Pump, Experimental and Numerical Investigation, Optimization, Artificial Neural Network.
