LAUSR

Abstract The aim of the present systematic study is to establish the effect of vertex angle and vertex tip radius on the performance of the V-cone flowmeter. Three different cone arrangements namely without support, front and rear supported cone element have been undertaken for a fixed beta value (β) of 0.6 with different vertex angles (φ). Shear Stress Transport k-ω (SST k-ω) turbulence model has been adopted for the closure solution. The performance evaluation is done on the basis of coefficient of discharge (Cd) and the extent of uncertainty (UCd) present in predictions within the range of Reynolds number (Re) investigated (Re = 103 to 106). This study is in the back drop of ISO 5167-5(2016) which has identified the vertex angle in the range of 52°±10°. From the study, it is revealed that in all the three mode of the cone arrangements, the cone element with vertex angle of 75° results in a discharge coefficient which is nearly constant for Reynolds number greater than 1000 with minimum uncertainty. An additional investigation has also been carried out for three vertex angles (φ) namely 60°,75° and 90° to analyze the effect of cone tip radius at Re = 5 × 105 on the performance of the V-cone flowmeter. It is seen that vertex tip radius has no effect on the performance.