LDA-based experimental study of flow crisis in the Ranque-Hilsch vortex tube
I.K. Kabardin
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Keywords: vortex tube, Ranque-Hilsch tube, flow crisis, hydraulic jump, LDA method
Abstract
The paper discloses the study of flow crisis in the Ranque-Hilsch vortex tube with a squared cross-section channel. Previous studies have found the conditions for developing the hydraulic crisis for air flow in this type of tube. The crisis phenomenon is related to the event when the longitudinal velocity at the nearwall vortex-circulation zone interface approaches the value of velocity for spreading centrifugal waves along this boundary. The paper presents and discusses the new detail results in measuring the kinematic parameters of the crisis flow, including the parameter of velocity pulsation. The evidences of a hydraulic jump neat the exit of the swirl flow to the tube working channel.
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