The position where air blocking is tends to occur was analyzed on the basis of the result of numerical simulation. In addition, the characteristics of the flow field of the impeller and the performance of the multiphase pump are computed by CFD numerical simulation. After that, the solid modeling of the three-dimensional blade of the impeller is formed. At last, the meridional blade elements, which are the intersecting curves of blade shape surface with several meridional planes at different angles, and the variation of blade thickness, are determined. Third, the blade mean camber line equation is integrated with the point-by-point integral method, and then the blade mean camber line on the stream-surface of revolution which corresponds to every meridian streamline is obtained in order to form the shape of the impeller blade surface. And then the distribution of velocity moments can be obtained further. Second, according to the discrete data of the contour shape, the meridian streamlines are determined by iterative computation based on solving the gas-liquid two phase meridional velocity gradient equation and the two phase coupled equations with quasi-orthogonals, and the flow parameters of the meridian flow net are computed simultaneously in order that the characteristics of the meridian fluid flow can be determined. First, the contour shape and size of the meridian flow channel of the impeller blade is determined by parameterization design.
The shape of the blade is obtained from a numerical solution of the meridian flow net the on meridional plane and blade mean camber lines on stream-surfaces of revolution. In this design method, the flow field of the impeller is computed with the hypothesis of multiphase homogeneous flow on the basis that it is the practical flow regime in the multiphase pump. The three-dimensional blade design method is adopted to design the blades of the impeller of a helico-axial multiphase pump.
Journal of Nanotechnology in Engineering and Medicine.Journal of Micro and Nano-Manufacturing.Journal of Manufacturing Science and Engineering.Journal of Engineering Materials and Technology.Journal of Engineering for Sustainable Buildings and Cities.
Journal of Engineering for Gas Turbines and Power.Journal of Engineering and Science in Medical Diagnostics and Therapy.Journal of Electrochemical Energy Conversion and Storage The three-dimensional blade design method is adopted to design the blades of the impeller of a helico-axial multiphase pump.Journal of Dynamic Systems, Measurement, and Control.Journal of Computing and Information Science in Engineering.Journal of Computational and Nonlinear Dynamics.Journal of Autonomous Vehicles and Systems.ASME Letters in Dynamic Systems and Control.ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part B: Mechanical Engineering.Mechanical Engineering Magazine Select Articles The design point torque and shaft power are about 3723 Nm and 3374 kW, which are 2.5 and 2.4 away from the design point numerical values without IBC of 3631 Nm and 3292 kW, respectively, which are 1.9 and 1.8 away from the design point numerical values with IBC of 3652 Nm and 3312 kW.
The improved impeller design exhibits a considerable increase in hydraulic efficiency compared to the initial design. The optimum values of the above that maximise the hydraulic efficiency at the BEP are then derived using a stochastic evolutionary algorithm software. Parametric studies are conducted to examine the influence of several design parameters, like the blade length, inlet height, leading edge inclination, cambering, and mean line curvature. The possibility of improving the design and increasing the hydraulic efficiency of a centrifugal pump impeller is investigated, with the implementation of advanced numerical tools and experimental data from a laboratory model. Grapsas, Vasilis Anagnostopoulos, John Papantonis, Dimitris Improved design of a centrifugal pump impeller using CFD and numerical optimisation tools Improved design of a centrifugal pump impeller using CFD and numerical optimisation tools