The Error in Measuring an Accelerated Flow Velocity by a Spark Tracer Method
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概要
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An ionized gas particle created by spark discharge between electrodes has a density different from that of the surrounding gas. This difference of densities causes errors in measuring the velocity when a spark tracer method is applied to an accelerated flow. In this paper, assuming a simple flow model, the error associated with the difference of densities of tracer and surrounding gas has been calculated for an unsteady accelerated flow induced by an expansion fan in a shock tube and for a steady accelerated flow in a subsonic nozzle. The error increases with time in the latter case, but in the former case it becomes maximum at a certain time. The calculated results qualitatively agree well with the experimental values measured in a driver section of a shock tube. Furthermore, the relation between the error and the magnitude of acceleration has been discussed.
- 一般社団法人日本機械学会の論文
著者
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MATSUO Kazuyasu
Graduate School of Engineering, Sciences, Kyushu University
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Setoguchi Toshiaki
Kyushu University
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Matsuo Kazuyasu
Graduate School Of Eng. Sciences Kyushu University
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Matsuo Kazuyasu
Graduate School Of Engineering Sciences Kyushu University
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YAMAMOTO Yoshihisa
Kyushu University
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