Research on Current Meters (2nd Report)

Abstract

In the preceding papers, the author described the characteristic of the current meter with the axis placed parallel to the flow. In this report, he has studied the characteristic curve of the current meter in the tilted flow and classified current meters into four categories in accordance with the type of aerofoils of their runner and with the error character on their indicated velocity under the influence of the tilted flow. By combining characteristic curves of more than two out of the simplified runners, the author has succeeded in trial production of a combined aerofoil current meter, which satisfies the cosine law under the influence of the tilted flow.