Multiphase flow measurement method based on double-section impedance type long waist cone sensor

A measurement method and impedance technology, applied in the measurement field that integrates the differential pressure measurement principle and the electrical measurement principle, can solve the problems of pulsation in the pressure signal, large overall pressure loss, calculation result error, etc., to expand the scope of application, realize The effect of precise measurement, repeatability and precision improvement
CN102116754AInactive Publication Date: 2011-07-06TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2011-07-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the fluid measurement technology field and relates to a multiphase flow measurement method based on a double-section impedance type long waist cone sensor. The adopted sensor comprises a cone throttling element, a systolic blood pressure drop differential pressure transmitter, a permanent pressure loss differential pressure transmitter and an electrical sensitive sensor. The method comprises the following steps: collecting two pairs of differential pressure signals generated by the cone throttling element; utilizing the electrical sensitive sensor to collect an electrical signal; calculating the total mass flow rate, the each-phase mass flow rate and the each-phase mass content according to a double-differential pressure model of a single throttling element; utilizing a support vector machine to realize classify, identify and pre-judge a flow pattern according to the measurement data of the differential pressure signals and the electrical signal; adopting a capacitance model to measure a mixed fluid dielectric constant; adopting a conductivity model to measure the mixed fluid conductivity; and calculating the procedure parameter of oil-gas-water three-phase flow. The multiphase flow measurement method is not influenced by the fact that whether a multiphase flow continuous phase is conducted or not, has the characteristics of high measurement precision,high reliability and the like and can obtain more measurement information.
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Description

technical field

[0001] The invention belongs to the technical field of fluid measurement, and specifically relates to a measurement method that integrates the principle of differential pressure measurement and the principle of electrical measurement, which is used to determine the content of each phase component of a multiphase flow within the range of a continuous phase from a conductive phase to a non-conductive phase, Parameters such as velocity and flow. The present invention takes the measurement of oil / gas / water multiphase flow as the description object, but is not limited to this application, and the measurement method of the present invention is still applicable in other industrial processes and chemical reactions. technical background

[0002] Multiphase flow usually refers to the flow of two or more substances at the same time, including gas-liquid two-phase flow, gas-solid two-phase flow, liquid-solid two-phase flow, liquid-liquid two-phase flow, and gas-liquid-li...

Claims

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