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Cavitation inception in fast startup

Abstract : The start-up of rocket engine turbopumps is generally performed only in a few seconds. It implies that these pumps reach their nominal operating conditions after only a few rotations. During these first rotations of the blades, the flow evolution in the pump is governed by transient phenomena, based mainly on the flow rate and rotation speed evolution. These phenomena progressively become negligible when the steady behaviour is reached. The pump transient behaviour induces significant pressure fluctuations which may result in partial flow vaporization, i.e. cavitation. An existing experimental test rig has been updated in the LML laboratory (Lille, France) for the start-ups of a centrifugal pump. The study focuses on cavitation induced during the pump start-up. Instantaneous measurement of torque, mass flow rate, inlet and outlet unsteady pressures, and pump rotation velocity enable to characterize the pump behaviour during rapid starting periods.
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https://hal.archives-ouvertes.fr/hal-00904935
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Submitted on : Friday, November 15, 2013 - 3:23:32 PM
Last modification on : Thursday, February 21, 2019 - 10:33:55 AM
Document(s) archivé(s) le : Monday, February 17, 2014 - 4:40:23 PM

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  • HAL Id : hal-00904935, version 1
  • OATAO : 9270

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Sébastien Duplaa, Olivier Coutier-Delgosha, Antoine Dazin, Gérard Bois, Guy Caignaert, et al.. Cavitation inception in fast startup. The Twelfth International Symposium on Transport Phenomena and Dynamics of Rotating Machinery - ISROMAC-12, Feb 2008, Honolulu-Hawaii, United States. pp. 124-133. ⟨hal-00904935⟩

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