Method for measuring speed and acceleration of two-phase flow particle cluster
A technology of particle agglomeration and agglomeration, which is used in the measurement of acceleration, velocity/acceleration/impact measurement, measurement devices, etc., can solve the problems of unusable, unreachable, and interventional measurement methods that are not suitable for industrial applications, and achieves a wide range of applications. Effect
Active Publication Date: 2010-11-03
INST OF PROCESS ENG CHINESE ACAD OF SCI
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The measurement means of the existing technology cannot meet this requirement
[0006] Two-phase flow reactors in industrial production are usually operated at high temperature and high pressure, which determines that interventional measurement methods such as probe probes are not suitable for industrial applications
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[0042] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.
[0043] The two-phase flow involved in the present invention is a fluid-solid two-phase flow, including gas-solid two-phase flow and liquid-solid two-phase flow, and the gas-solid two-phase flow is mainly used as an example for description below. The measurement principle and method of liquid-solid two-phase flow are the same as those of gas-solid two-phase flow, and will not be repeated here.
[0044] The present invention is realized based on an x-ray detection device, and the x-ray detection device includes a ray source and a linear detector array, and a reactor is located between the ray source and the detector array. The structure of the x-ray detection device is as figure 1 As shown, the ray source 1 and the linear detector array 4 are installed on the three-way fine-tuning platform 5, which are respectively located on both sides of the gas-solid tw...
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Abstract
The invention provides a method for measuring speed and acceleration of a two-phase flow particle cluster, which is realized based on an x-ray detector. The x-ray detector comprises a ray source and a linear detector array, wherein a reactor is positioned between the ray source and the detector array. The method for measuring the speed of the two-phase flow particle cluster comprises the following steps: (1) acquiring reactor background projection signals Ir which do not contain flow information at each detector unit of the detector array; (2) enabling the reactor to work, and acquiring projection signals I which contain flow information at each detector unit under a series of measuring times in a period of time; (3) computing the particle volume fraction epsilon p{n, i} corresponding to each detector unit under each measuring time according to the data of the step (1) and the step (2); and (4) judging the occurrence position and the occurrence time of the cluster according to the fluctuation of the particle volume fraction, and computing the speed and the acceleration of the two-phase flow particle cluster.
Description
technical field [0001] The invention belongs to the technical field of multiphase flow measurement, in particular, the invention relates to a method for measuring the velocity and acceleration of particle agglomerates in a two-phase flow reactor. Background technique [0002] Fluid-solid two-phase flow widely exists in process industrial equipment such as petroleum, chemical industry, and metallurgy. It has the typical characteristics of nonlinear non-equilibrium: under far from equilibrium conditions, fine-tuning of operating parameters can lead to dramatic changes in the two-phase flow structure, which in turn affects the performance of the device. Therefore, a deep understanding of the mechanism of fluid-solid two-phase flow and its structure is of great significance for improving production efficiency and reducing energy consumption. The particle agglomeration is an important phenomenon in the fluid-solid two-phase flow system, which is directly related to the slip velo...
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Inventor 孟凡勇王维李静海
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI