Flow of Liquid Metals with a Transversely Applied Magnetic Field : 3rd Report, Influence of an Electric and a Magnetic Field on the Transition of Flows

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概要

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• It is well recognized that turbulent pulsations in an electrically conducting fluid are suppressed and a velocity profile is made uniform due to the action of a transverse magnetic field. Murgatroyd measured the pressure gradient during the flow of mercury in a rectangular channl of 15 : 1 aspect ratio in the presence of a transverse magnetic field and suggested that the critical condition for the transition from turbulent to laminar flow was R_e/M=900. However, MHD devices such as conduction electromagnetic pumps used in metallurgical and chemical industries are placed in a relatively short magnetic field and therefore Murgatroyd's criterion for the transition of flows seems not to be applicable due to the end effect. This paper is an experimental study on the influence of an electric and a magnetic field on the transition of flows in a kind of conduction electromagnetic pump. The experiment suggests that in this device, the critical Reynolds number is lower than that based on Murgatroyd's criterion owing to the end effect.

• 一般社団法人日本機械学会の論文

著者

• Tomita Yukio

  Tokyo Institute Of Technology

• SUDOU Kouzou

  Tokyo Institute of Technology

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