Inception of Stall in a Centrifugal Impeller

Murugesan, K and Ramamurthy, S (1995) Inception of Stall in a Centrifugal Impeller. In: 2nd National Conference on Air Breathing Engines, 1995, Melbourne, Australia. (Submitted)

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Abstract

Measurements at outlet of a centrifugal impeller show spatial and temporal variations of flow velocity. There is pitch wise symmetry and time wise repetitiveness with impeller rotation at large flow coefficients. This flow structure undergoes changes as the flow coefficient is reduced from a large value, by throttling, towards stall. A newly evolved parameter characterizes these changes and helps to identify regions of instability and rotating stall. The correlation between this instability parameter and flow coefficient is very clear and quite good. The magnitude of this parameter value could be used to identify the inception of stall in centrifugal impellers so as to activate control mechanism

Item Type: Conference or Workshop Item (Lecture)
Uncontrolled Keywords: Impellers;Centrifugal compressors;rotating stalls;Flow velocity;Velocity distribution
Subjects: AERONAUTICS > Aeronautics (General)
AERONAUTICS > Aircraft Propulsion and Power
Depositing User: Dr S Ramamurthy
Date Deposited: 10 Aug 2010 04:32
Last Modified: 10 Aug 2010 04:32
URI: http://nal-ir.nal.res.in/id/eprint/8923

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