The Discharge Coefficient of Centrifugal-Head Flow Meter

Tsuji, Shigeru; Kawashima, Genshi

doi:10.1299/jsme1958.9.300

Cited by 2 publications

(3 citation statements)

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“…They were made of accurately machined transparent acrylic plates. The dimensions were chosen with reference to 360° bend flowmeters examined in previous works [9,14,21,22] on steady flows; the dimensions tested are shown in Tab. 2.…”

Section: Experimental Apparatus and Proceduresmentioning

confidence: 99%

“…Hence, the test bend flowmeters were finished to a very hydraulically smooth surface and were also geometrically accurate. The position of the pressure measurement was set at the turn angle of 180° measured from the bend entrance with reference to the results of previous studies [9,14,21,22] on steady flows. Furthermore, the diameter of the pressure holes was 0.4 mm on the basis of the results of studies on steady flows [9,24] and on pulsatile flows in straight pipes [23].…”

Section: Experimental Apparatus and Proceduresmentioning

confidence: 99%

“…In this paper, we describe the pressure characteristics of a pulsatile flow in 360-degree (i.e., full-circle pipe) bend flowmeters [9,14,21,22] and propose a method of measuring the pulsatile flow rate using such flowmeters. In 360° bend flowmeters, a fully developed curved-pipe flow can be effectuated, regardless of the velocity distribution at the entrance and the turn angle in the measuring section.…”

Section: Introductionmentioning

confidence: 99%

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Obtaining Pulsatile Flow Rate Using a 360-Degree Bend

Sumida¹

2015

ujme

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360-degree bend flowmeters were applied to determine pulsatile flow rates in water. Experiments were performed using bend flowmeters with curvature radius ratios of 7, 10 and 30 under the conditions of Womersley numbers of α=2.1−18, mean Reynolds numbers of Re ta =800−5×10 4 and oscillatory Reynolds numbers of Re os =600−1.6×10 4 . The pressure difference across the bend was found to be independent of the pulsation frequency and to conveniently vary with almost the same phase as the instantaneous flow rate. A method for measuring the instantaneous flow rate is proposed as well as a method for estimating the time-mean and amplitude values of the pulsatile flow rate. It is concluded that 360-degree bend flowmeters can be used to measure the pulsatile flow rate.

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Section: Experimental Apparatus and Proceduresmentioning

confidence: 99%