Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
NUMERICAL ANALYSIS OF THE INFLUENCE OF OUTPUT ANGLES OF ROTOR BLADES ON CHARACTERISTICS CURVES OF A RADIAL PUMP
Submission Author:
Luan de Lima Freire , RN
Co-Authors:
Luan de Lima Freire, Luís Morão Cabral Ferro
doi://10.26678/ABCM.COBEM2017.COB17-2235
Abstract
The use of computational tools for the solution of engineering problems has been growing in last years. Many of these problems deal with fluid flow, often incompressible, and a description of a complex geometry is need. In industry pumps are applied to increase the pressure of the fluids or to extract fluids from reservoirs, as in the oil industry, for example. Numerical methods can be used to evaluate the performance of pumps at different situations. . In this paper a Computational Fluid Dynamics (CFD) software available in ANSYS® is used to compute the flow through a rotor of radial pump of an oil with a dynamic viscosity of 582.75 cP and an absolute density of 925 kg/m3. Characteristics curves of total height, efficiency and brake horsepower as a function of volumetric flow rate for different output angles of the blades of the pump are computed and compared for three different angles of the blades. The domain of the fluid is discretized by a structured mesh. A mass outflow condition is prescribed at outlet section and the velocity direction is known at inlet section. No slip condition is used at the hub and the shroud surfaces and the periodic condition is used at the remaining surfaces. The turbulence is modulated by k- model. The computed characteristic curves for the three outlet angles are shown and are compared. Results for the velocity fields and meridional average total pressure are also shown and compared for the three outlet angles. The results show that the CFD was able to predict correctly the characteristic curves and can be used as a tool on the design of centrifugal rotor pumps.
Keywords
Aerodynamics, Computational fluid dynamics (CFD), Characteristic curves, Navier-Stokes Equations
