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    • 7. 发明授权
    • Method and system for measuring multiphase flow using multiple pressure differentials
    • 使用多个压力差测量多相流的方法和系统
    • US06332111B1
    • 2001-12-18
    • US09401375
    • 1999-09-22
    • James R. Fincke
    • James R. Fincke
    • G01F174
    • G01F15/08G01F1/44G01F1/74G01F1/88
    • An improved method and system for measuring a multiphase flow in a pressure flow meter. An extended throat venturi is used and pressure of the multiphase flow is measured at three or more positions in the venturi, which define two or more pressure differentials in the flow conduit. The differential pressures are then used to calculate the mass flow of the gas phase, the total mass flow, and the liquid phase. The method for determining the mass flow of the high void fraction fluid flow and the gas flow includes certain steps. The first step is calculating a gas density for the gas flow. The next two steps are finding a normalized gas mass flow rate through the venturi and computing a gas mass flow rate. The following step is estimating the gas velocity in the venturi tube throat. The next step is calculating the pressure drop experienced by the gas-phase due to work performed by the gas phase in accelerating the liquid phase between the upstream pressure measuring point and the pressure measuring point in the venturi throat. Another step is estimating the liquid velocity in the venturi throat using the calculated pressure drop experienced by the gas-phase due to work performed by the gas phase. Then the friction is computed between the liquid phase and a wall in the venturi tube. Finally, the total mass flow rate based on measured pressure in the venturi throat is calculated, and the mass flow rate of the liquid phase is calculated from the difference of the total mass flow rate and the gas mass flow rate.
    • 一种用于测量压力流量计中的多相流的改进方法和系统。 使用延长的喉管文丘里管,并且在文丘里管中的三个或更多个位置处测量多相流的压力,其在流动管道中限定两个或更多个压力差。 然后使用差压来计算气相的质量流量,总质量流量和液相。 用于确定高空隙率流体流和气流的质量流量的方法包括某些步骤。 第一步是计算气体流量的气体密度。 接下来的两个步骤是通过文丘里管找到归一化的气体质量流量并计算气体质量流量。 以下步骤是估算文丘里管喉管中的气体速度。 下一步是计算由于气相在文丘里喉部上游压力测量点和压力测量点之间的液相加速过程中气相所产生的压降。 另一个步骤是使用由气相进行的工作由气相经历的计算压降来估算文丘里喉部的液体速度。 然后在文丘里管中的液相和壁之间计算摩擦。 最后,计算出文丘里喉部测量压力的总质量流量,并根据总质量流量与气体质量流量的差值计算液相质量流量。
    • 10. 发明授权
    • System for measuring multiphase flow using multiple pressure differentials
    • 使用多个压力差测量多相流的系统
    • US06502467B1
    • 2003-01-07
    • US09400946
    • 1999-09-22
    • James R. Fincke
    • James R. Fincke
    • G01F144
    • G01F15/08G01F1/44G01F1/74G01F1/88
    • An improved method and system for measuring a multi-phase flow in a pressure flow meter. An extended throat venturi is used and pressure of the multi-phase flow is measured at three or more positions in the venturi, which define two or more pressure differentials in the flow conduit. The differential pressures are then used to calculate the mass flow of the gas phase, the total mass flow, and the liquid phase. The system for determining the mass flow of the high void fraction fluid flow and the gas flow includes taking into account a pressure drop experienced by the gas phase due to work performed by the gas phase in accelerating the liquid phase.
    • 一种用于测量压力流量计中多相流的改进方法和系统。 使用延长的喉管文丘里管,并且在文丘里管中的三个或更多个位置处测量多相流的压力,其在流动管道中限定两个或更多个压力差。 然后使用差压来计算气相的质量流量,总质量流量和液相。 用于确定高空隙部分流体流量和气流的质量流量的系统包括考虑由气相在加速液相中进行的工作时气相所经历的压降。