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Electromagnetic flowmeter is affected by the influence of medium moisture content

According to the principle of the split-type electromagnetic flowmeter, the water content in the measuring channel is affected by the spacing of the upper and lower inlet ports, but it does not affect the flow pattern and flow state of the two-phase flow, so the upper and lower inlet ports The internal flow field simulation cloud of the shunt instrument at a distance of 30 mm.
1. At low flow rate, the inside of the shunt tube contains only a small amount of oil, and the addition of the shunt tube plays a diversion effect; when the flow rate is high (greater than 100m3/d), the flow rate of the oil-water two-phase flow is also high, and the fluid is mixed. Evenly reaching the emulsified state [4], the oil accumulation under the collecting umbrella is not obvious during the flow, so the oil content in the shunt tube is increased compared with the oil content under the corresponding water content at the low flow rate.
2. With the increase of water content under each flow point, the number of oil bubbles is less and less, and the size is getting smaller and smaller.
3. In the laminar flow state, before the oil-water two-phase flow enters the instrument, the oil bubble is a bulky block; while in the turbulent state, the oil bubble is small in volume before entering the instrument, and is in an aggregate state; the shunt tube The existence of the two-phase flow has a certain hindrance effect, and it has an irregular shape in the shunt tube compared with the oil bubbles accumulated at the bottom.

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