Parametric Study for Optimal Design of a Piping System in a Serially Connected Multi-Stage Turbo Blower

摘要

Optimal design of a piping system connected in the multi-stage turbo blower has been performed using response surface method and three-dimensional Navicr-Stokes analysis to reduce pressure loss in the piping system. To analyze three-dimensional flow field in the piping system including a multi-stage turbo blower, general analysis code, CFX, is employed in the present work. SST turbulence model is employed to estimate the eddy viscosity. Unstructured grids are used to represent a composite grid system including circular duct, blower impeller, casing and gate valve. Throughout the optimization of a piping system using two design variables defined the radius of an inlet and outlet ducts, the pressure loss in the piping system is successfully reduced by decreasing local losses in the piping system. Detailed flow analysis is performed using the reference and optimum shape of the connecting duct.