Heat Field Characteristics of Solid Domain of Nozzle Flowmeter with Different Weld Structures

In this paper, four weld structures with a total of 10 distinct welds were produced and the effect of weld structures on the heat flow field within the solid wall of the nozzle flowmeter is thoroughly investigated by numerical calculations. The results show that, on the path from upstream to downstream, the distance between the weld and nozzle, the width below the weld, the taper angle and the opening have less influence on the heat flow distribution. On the path from the inner to the outer wall, the taper angle and the opening have a greater effect on the peak and the maximum magnitude of the total heat flow, and the peak and the maximum magnitude of the total heat flow for big taper angle and opening welds are much bigger than those under small taper angle and opening welds. The distance between the weld and nozzle, the width below the weld, the taper angle and the opening significantly affect the heat flow distribution of the path section near 0.2 times the length of the monitoring path. However, the heat flow distribution inside the nozzle flowmeter is minimally affected by the distance between the weld and nozzle, the width below the weld, the taper angle and the opening.