G211 CONTROL OF CAVITATION WITH SEPARATION BUBBLE BASED ON FREE STREAM TURBULENCE(Fluid machinary-1)

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概要

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• Cavitation is one of the serious problems on fluid machinery. This study is the fundamental research to control the cavitation breakdown and other cavitation behavior on the step with the separation bubble. The control method is to induce the disturbance by the circular cylinder placed at the upstream of the step. The experiment and the observation were carried out with two-dimensional LDV and sequence photographs. As the results, the cavitation behavior changes with the disturbance level in the shedding vortex cavitation region. At the low disturbance level, the two-dimensional vortex cavitation develops in the separation bubble and sheds out to the downstream maintaining its own shape. At the high disturbance level, the complex three-dimensional intertwined string vortex cavitations are contributed to shed the cavitation cluster to the downstream. And also, the disturbance level can control the cavity length as well as the separation-bubble length. But in the fully developed cavitation, any disturbance level is not able to control the cavity length.

• 一般社団法人日本機械学会の論文
• 2000-10-01

著者

• Matsudaira Yasuaki

  Dep. Of Mechanical Engineering Tokyo Metropolitan Institute Of Technology

• Obara Hiromichi

  Dep. Of Mechanical Engineering Tokyo Metropolitan Institute Of Technology

• MATOBA Kenji

  Graduate school of Tokyo Metropolitan Institute of Technology

• NOU Hidekazu

  Graduate school of Tokyo Metropolitan Institute of Technology

関連論文

• G211 CONTROL OF CAVITATION WITH SEPARATION BUBBLE BASED ON FREE STREAM TURBULENCE(Fluid machinary-1)

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