Two-phase flow phase-splitting flow velocity acoustic-electric bimodal measuring method

A measurement method, dual-mode technology, applied in fluid velocity measurement, average velocity measurement, velocity/acceleration/shock measurement, etc., can solve problems such as greater influence on test accuracy

Active Publication Date: 2015-10-07
TIANJIN UNIV
View PDF4 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the use of electrical methods and ultrasonic methods to obtain the phase-separated flow velocity of two-phase flow, the cross-correlation velocity measurement method is often used, but the measured velocity is not the total flow velocity of the two phases or the phase-separated flow velocity, which needs to be explained according to parameters such as flow pattern and slip ratio , the test accuracy is greatly affected by the flow state

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Two-phase flow phase-splitting flow velocity acoustic-electric bimodal measuring method
  • Two-phase flow phase-splitting flow velocity acoustic-electric bimodal measuring method
  • Two-phase flow phase-splitting flow velocity acoustic-electric bimodal measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The calculation method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] figure 1It is a schematic diagram of ultrasonic Doppler measurement space in the measurement method of the present invention. The ultrasonic Doppler probe used in the patent of the present invention includes an ultrasonic transmitting probe 3a and an ultrasonic receiving probe 3b, and the ultrasonic Doppler probes 3a, 3b and the pipeline 1 are installed at an angle θ, so that the ultrasonic testing path is connected to the two-phase flow 2 The incoming flow direction 0 maintains an included angle θ. The ultrasonic probe 3a is installed on the top of the pipeline, and the ultrasonic probe 3b is installed on the bottom of the pipeline, and it is ensured that the ultrasonic probes 3a, 3b and the center of the pipeline are in the same longitudinal section. The excitation probe 3a emits ultrasonic waves, which propagate in the two-phase ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a two-phase flow phase-splitting flow velocity acoustic-electric bimodal measuring method. A used bimodal sensor comprises an electric sensor and an ultrasonic Doppler probe. The measuring method comprises: acquiring a signal and acquiring water phase volume fraction, oil phase volume fraction, and two-phase flow mixed density by using the electric sensor; determining the measuring space of the ultrasonic Doppler probe and computing the equivalent height of the measuring space; computing a difference between ultrasonic signal frequency acquired by a ultrasonic receiving probe and exciting ultrasonic signal frequency emitted from a ultrasonic emitting probe and computing average flow velocity in the measuring space; establishing a fluid flow velocity distribution relation of a position in a pipeline and a certain distance to the wall of the pipeline; establishing a relation between Doppler measurement flow velocity and boundary layer flow velocity in the measuring space; solving the boundary layer flow velocity; and computing total flow velocity and acquiring the water phase flow velocity and oil phase flow velocity. The two-phase flow phase-splitting flow velocity acoustic-electric bimodal measuring method may accurately acquire two-phase flow phase volume fraction by a noninvasive mode.

Description

technical field [0001] The invention belongs to the technical field of fluid measurement, and relates to a measurement method combining an ultrasonic sensor and an electrical sensor, which is used for non-disturbance measurement of two-phase flow velocity. technical background [0002] Two-phase flow exists widely in industrial processes such as petroleum and chemical industry, such as oil-water two-phase flow, gas-liquid two-phase flow, etc. Accurate measurement of its process parameters will help the optimization and design of industrial processes, improve production efficiency, reduce cost and energy consumption. Due to the strong dynamic coupling characteristics between the oil and water phases, the flow process is complex and transient, making it difficult to measure the flow velocity and holdup. [0003] Traditional two-phase flow test methods mostly use intrusive test methods, such as turbine flowmeters and differential pressure flowmeters, etc., which will cause dis...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01P11/00G01P5/00
Inventor 谭超袁野董虓霄董峰
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap