Universal Journal of Mechanical Engineering Vol. 3(3), pp. 63 - 70
DOI: 10.13189/ujme.2015.030301
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Obtaining Pulsatile Flow Rate Using a 360-Degree Bend

Masaru Sumida ^*
Faculty of Engineering, Kinki University, Japan

ABSTRACT

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=800−5×10⁴ and oscillatory Reynolds numbers of Re_os=600−1.6×10⁴. 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.

KEYWORDS
Flow Measurement, Unsteady Flow, Bend Flowmeter, Pulsatile Flow, Discharge Coefficient, Curved Pipe

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Masaru Sumida , "Obtaining Pulsatile Flow Rate Using a 360-Degree Bend," Universal Journal of Mechanical Engineering, Vol. 3, No. 3, pp. 63 - 70, 2015. DOI: 10.13189/ujme.2015.030301.

(b). APA Format:
Masaru Sumida (2015). Obtaining Pulsatile Flow Rate Using a 360-Degree Bend. Universal Journal of Mechanical Engineering, 3(3), 63 - 70. DOI: 10.13189/ujme.2015.030301.