Pressure Recovery of V-Cone Flowmeter Under High Gas Volume Fraction

doi:10.7652/xjtuxb201809016

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Pressure Recovery of V-Cone Flowmeter Under High Gas Volume Fraction

更新时间：2025-05-01

- Pressure Recovery of V-Cone Flowmeter Under High Gas Volume Fraction
- Vol. 52, Issue 9, Pages: 118-126(2018)
- 作者机构：
  
  1. 西安理工大学省部共建西北旱区生态水利国家重点实验室,西安,710048
  2. 西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201809016
  CLC： TH71;TK313
- Online First：10 September 2018，
  
  Published：2018
- 稿件说明：
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Pressure Recovery of V-Cone Flowmeter Under High Gas Volume Fraction[J]. 2018, 52(9): 118-126.
DOI：

Pressure Recovery of V-Cone Flowmeter Under High Gas Volume Fraction[J]. 2018, 52(9): 118-126. DOI： 10.7652/xjtuxb201809016.

摘要

针对高含气率条件下V锥流量计内气液相分布及对V锥下游压力恢复影响进行了实验研究

考查了不同流型的来流以及节流比对气液相分布的影响

获得了不同节流比V锥流量计的压力恢复长度。研究表明:气液两相流流经V锥后

其流动状态可能发生转变

节流比越小

来流的变化越明显; 流态的变化直接影响V锥流量计内的压力分布

气液两相流条件下V锥流量计所需的压力恢复长度与单相流体相比较短。对于节流比为0.45的V锥流量计

高含气率条件下

下游压力在6D(D为管道内径)处可以恢复

部分工况下

压力在下游3D处也可恢复

而节流比为0.55、0.65和0.75的V锥流量计

压力在下游3D处即可恢复。研究结果可为开发基于单V锥节流元件的气液两相流量在线测量方法提供技术支撑。

Abstract

The gas-liquid distribution in the V-Cone flowmeter and the effect of the distribution on the downstream pressure recovery of V-Cone under high gas volume fraction were experimentally investigated. The effects of inlet flow patterns and equivalent diameter ratio of the V-Cone flowmeter on the gas-liquid distribution were explored. The pressure recovery length of the V-Cone flowmeter at different equivalent diameter ratio was obtained. The results show that the flow pattern may be changed when flowing through the V-Cone

and the diameter ratio significantly affects the downstream flow pattern of the V-Cone. The pressure distribution along the flow direction is closely related to the flow pattern. It is found that the pressure recovery length of the V-Cone flowmeter for gas-liquid flow is shorter than that for single-phase fluid. The pressure recovery length of the V-Cone flowmeter with a diameter ratio of 0.45 at high gas volume fraction is less than 6D

and the pressure can be recovered at the position of 3D downstream of V-Cone under certain conditions. For the V-Cone flowmeters with the diameter ratios of 0.55

0.65 and 0.75

the pressure can be recovered at the position of 3D downstream of V-Cone. This study may provide a guide to the development of a method for measuring gas and liquid flow rates online by a V-Cone throttle device.

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references

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