Analytic Approach for the Design of Centrifugal Impellers

Ramamurthy, S and Murugesan, K (1996) Analytic Approach for the Design of Centrifugal Impellers. In: 3rd National Conference on Air Breathing Engines and Aerospace Propulsion, December 1996, IIT,Chennai.

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Two different types of analytic functions have been evolved to define the centrifugal impeller geometry. A parameter called wrap angle was used in these analytic functions to vary the impeller blade shape. The relative advantages of one analytic function over the other is highlighted by comparing the blade geometry, channel area variation and derivatives of important geometric parameters affecting the flow. The impellers generated from the evolved analytic equations were theoretically analyed for hub to shroud and blade to blade flows. The performance of the impellers were compared from the aspects of boundary layer parameter and blade loading. First and second analytic functions for large wrap angles and only first analytic function for small wrap angles were found suitable to define the blade geometry. For large axial lengths impeller having small wrap angle was found advantageous. Wrap angles of the order slightly greater than the fluid deflection were found advantageous from the aspect of derivatives of important geometric parameters.

Item Type: Conference or Workshop Item (Lecture)
Subjects: AERONAUTICS > Aeronautics (General)
AERONAUTICS > Aircraft Propulsion and Power
Depositing User: Dr S Ramamurthy
Date Deposited: 13 Aug 2010 04:54
Last Modified: 13 Aug 2010 04:54

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