Optimum Design of a Screw-In Venturi Flow Sensor

Abstract:

To study discharge coefficient linearity of screw-in venturi flow sensor, the effect of the screw-in blade attached to the sensor on discharge coefficient was analyzed, the structure of the screw-in blade was optimized by CFD software. Through the observation of velocity field, it was found that discharge coefficient will basically remain unchanged at low Reynolds number, while it declines greatly at high Reynolds number because of the guidance of the screw-in blade, as a result discharge coefficient linearity becomes better at the same measurement range. Orthogonal array of DN100 was designed for 10:1 measurement range to explore effect of geometric parameters of the screw-in blade on discharge coefficient linearity. Optimum structure for the screw-in blade is determined as follows: number of blade is 4, back slip angle of blade is 50°, front slip angle of blade is 5° and height of blade is 10.5mm. The numerical simulation indicates discharge coefficient linearity of the optimal screw-in venturi flow sensor is 0.601%,which is better than that of double-cone venturi flow sensor.

• Periodical: Applied Mechanics and Materials (Volumes 401-403)
• Pages: 1082-1086
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.401-403.1082
• Online since: September 2013
• Authors: Ying Xu, Xiang Hong Zhang, Tao Zhang, Lu Gao
• Keywords: Computational Fluid Dynamics (CFD), Discharge Coefficient Linearity, Orthogonal Array, Screw-In Blade

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