Design of a Centrifugal Blower Adopting Reverse Engineering Approach

Abstract

The present project has developed strategy and design procedure for blower which is expected to bring down the lead time during designing through the Reverse Engineering approach. The different dimensions & geometry of parts of the existing blower were found out by obtaining the Cartesian coordinates of various identified points. Thereafter the required profile and models were developed using this data with the help of CATIA V5 modeler. The Suction condition and other related data's such as "inlet & outlet diameter", "inlet & outlet vane angles" & "vane width" at the inlet and outlet were used to calculate specific data's such as "Absolute velocity of the jet", "velocity at the inlet and outlet", "whirl velocity at outlet" and "exit angle of jet at the vane". The project also covers areas of Geometric Analysis, Fluid Dynamics and Concept of Curve Generation. NOMENCLATURE: θ-Inlet vane angle, degrees r 1-Radius of Impeller at inlet, m ф-Outlet vane angle, degrees r 2-Radius of Impeller at outlet, m β-Angle at which jet leaves the vane, degrees u 1-Vane velocity at inlet, m/s b 1-Vane width at inlet, m u 2-Vane velocity at outlet, m/s b 2-Vane width at outlet, m v 1-Absolute velocity of jet, m/s Q-Discharge rate, m v f1-Velocity of flow at inlet, m/s N-Speed of Impeller, RPM v f2-Velocity of flow at outlet, m/s ω-Angular Speed of Impeller, rad/s v w2-Whirl velocity at outlet, m/s R-Base Radius, m