چكيده به لاتين
Abstract
A considerable share of energy consumes powering pumps, compressors, fans and other turbomachinery. Fans are widely used in industries and commercial and residential applications, so their optimization can play a vital role in per capita energy consumption. Different design methodologies including fundamental concepts, Austin Church, Williame C. Osborne and unified design are introduced. The unified design is considered as the criterion in the present work. Then Design parameters are optimized using computational iterative algorithms. Fan design involves solving numerous equations, so a software package provided that includes graphical user interface, and the aerodynamic design of the impeller, casing and shaft for the centrifugal fan of the radial backward curved represented in form of three-dimensional. In order to evaluate the performance of the designed model, numerical simulations have been performed and the results including performance curve of the fan, velocity and pressure contours in all section of the device represented. The results are obtained for mass flow rates of 0.1 m3/s to 0.6 m3/s for 16 blade radial backward curved fan. A small eddy is observed near the volute casing and inside the blade passage. It begins to form near the inlet blade passage, then developing through the passage and enters to the suction side gradually. Numerical simulation results show that geometric optimization in these areas will have Effective help in improving the performance of the centrifugal fan.
Keywords: Design, optimization, aerodynamics, simulation, centrifugal fan software
