An Optimization Scheme for Designing Two-Dimensional Backward-Curved Centrifugal Fans

A procedure is presented for optimizing the design of two-dimensional, backward-curved, relatively low cost centrifugal fans to operate at maximum efficiency permitted by the speed and space requirements. The procedure utilizes an optimization map that is based on an analysis which reduces the variables by geometrical constraints and empirical values. The empirical values and much of the analytical treatment are based on experimental studies and the literature on centrifugal fans, pumps, and compressors. Some of the geometrical relationships are chosen to simplify fabrication without seriously jeopardizing fan performance.