A Judgment Method of Transition Limit from Oil-Water Stratified Flow to Bicontinuous Flow
An oil-water stratification, dual-continuous technology, applied in the field of multiphase flow, can solve the problems of late start of research, quantitative research, and failure to obtain the value of critical state elements of flow pattern transformation.
Active Publication Date: 2021-09-17
HOHAI UNIV
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[0003] However, due to the limitations of experimental equipment and measurement technology, the experimental research on the flow pattern conversion of horizontal and inclined oil-water two-phase flow started relatively late.
In the existing research, the qualitative research is mainly on the flow pattern conversion, and the influencing factors of the flow pattern transformation are studied. The quantitative research on the relationship between the flow pattern transformation and the influencing factors has not been carried out completely, and the elements of the critical state of the flow pattern transformation have not been obtained. value
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[0043] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0044] Such as figure 1 As shown, it is a flow chart of the method of the present invention, a method for judging the transition limit of oil-water layered flow to double continuous flow in an upwardly inclined pipeline, comprising the following steps:
[0045] Step 1: Analyze the force of the oil-water two-phase interface wave, and use the interface wave force balance analysis method to decompose the four external forces on the interface wave into parallel to the flow direction and perpendicular to the flow direction, so as to calculate and obtain the interface wave in the flow Direction is subjected to the vector sum expression of resultant external force, and described four kinds of external...
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The present invention discloses a method for judging the conversion limit of oil-water stratified flow to bicontinuous flow in the technical field of multiphase flow, aiming at solving the limitation of qualitative research and the lack of quantitative research on the conversion of horizontal and inclined oil-water two-phase flow in the prior art The method is used to obtain the technical problem of the element value when the flow type transitions to the critical state. The method includes the following steps: analyzing the force situation of the oil-water two-phase interface wave, obtaining the vector sum expression of the external force on the interface wave; making assumptions on the interface wave and its deformation and damage on the basis of the experiment; According to the formula, the prediction equation of the combined external force on the interface wave in the flow direction is obtained; according to the prediction equation, the conversion limit of the oil-water stratified flow to the bicontinuous flow is judged.
Description
technical field [0001] The invention relates to a method for judging the transition limit from oil-water stratified flow to bicontinuous flow, and belongs to the technical field of multiphase flow. Background technique [0002] The flow regime transition of oil-water two-phase flow, that is, phase change, will cause sudden changes in flow field parameters and bring challenges to the design of multiphase flow systems. The flow pattern of oil-water two-phase flow will change with the change of pipe diameter, inclination angle, physical properties of oil, etc. The transition of oil-water two-phase flow in horizontal pipeline mainly occurs between separated flow and dispersed flow, while the flow pattern transition of oil-water two-phase flow in inclined pipeline occurs between separated flow, dispersed flow and intermittent flow. The transition from oil-water two-phase laminar flow to bicontinuous flow is related to two-phase interfacial tension, physical properties, mixing ve...
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IPC IPC(8): B01D17/02B01D17/12G01M10/00
CPCB01D17/02B01D17/12G01M10/00
Inventor 张代路张宏兵芮剑文尚作萍
Owner HOHAI UNIV