Acceleration of Water Column and Generation of Large Flow Rate Water Spray by Shock Tube.

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An extensive experimental investigation was carried out with the aim of understanding the hydrodynamics involved in accelerating water column contained in a circular tube and generating large flow rate water spray by shock tube. Water column in tube was accelerated by two means, one is by compressed gas directly, this facility operates like as a shock tube but the flow in the tube is gas/liquid two phase flow, the other is by a gas/gas shock tube. Evolution of the two-phase flow in tube and the generated water spray was visually observed. Velocity measurement by laser cutting technology was made to understand the motion of the water column and the bubble in tube. In addition, wave motion in tube measured by PVDF pressure transducers shows that the pressure wave in a gas/water shock tube was significantly different from that in a gas/gas one in many aspects.

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