Abstract
A development is undertaken to determine possible configurations for multiple row or tandem blades for blowers. For the individual rows of the airfoils, changes in blade number, blade camber, and chord length are analyzed. Modifications in the arrangement between two blade rows are made and tests are presented to determine the optimum design. Tests are shown regarding the effects of changes in blade number and blade solidity. The tests indicate that two row blades are capable of larger flow deflection with associated flow deceleration than single airfoils. The development makes it possible to reduce the number of stages for multistage blowers.
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