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首页> 美国政府科技报告 >The Detection of Electrically-Induced Secondary Flows in a Pipe by Means of Electrostatic Probes
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The Detection of Electrically-Induced Secondary Flows in a Pipe by Means of Electrostatic Probes

机译：用静电探针检测管道中的电感二次流动

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An experimental investigation was conducted to detect the presence of electrically induced secondary flows inside a round pipe. A thin concentric wire in the pipe was impressed with a high positive voltage which generated a corona discharge, producing ions and a radial electric field in the pipe. It was postulated that secondary flows taking the form of vortex flows inside the pipe would result. A technique of utilizing electrostatic probes inserted into the pipe and on the wall provided strong evidence that secondary flows were generated both with and without a primary axial flow. At zero axial flow the characteristic length of the secondary flow was on the order of two pipe diameters. With an axial flow, when the primary and secondary flows are superimposed, various characteristic lengths were observed. (Author)

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