Study on Flow Straightening of Turbine Flowmeter

概要

論文の詳細を見る
At first, the effect of axial velocity distribution of the pipe flow entering the rotor on the metering accuracy of a turbine flowmeter was studied theoretically and experimentally. An analysis of the relation between the revolution speed of rotor and the velocity distribution was presented. Characteristics of the meter set behind a bend or an orifice were measured and the deviation of metering accuracy due to the difference of upstream velocity profiles was discussed. Secondly, a multi-tube flow straightener was proposed to reduce the errors caused by distorted velocity profiles downstream of a single bend. Then, it is shown that a metering accuracy better than ±0.2% could be attained by using a flow straightener assembly of the overall length of 10 pipe diameters preceding the meter.
一般社団法人日本機械学会の論文