Computational fluid dynamics (CFD) technology-based method for optimizing acoustic path of multi-path ultrasonic flowmeter assembled in elbow pipe

An ultrasonic flowmeter and multi-sound path technology, which can be used in measurement devices, flow measurement/mass flow measurement, liquid/fluid solid measurement, etc.

Active Publication Date: 2011-06-08
BEIJING UNIV OF TECH +1
View PDF3 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the multi-channel ultrasonic flowmeter to measure the flow rate of the standard straight pipe section, there is a relatively well-formed model, but for the straight pipe section that does not have the installation requirements and needs to be installed at the bend, the research on how to ensure the measurement accuracy is almost blank

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
  • Computational fluid dynamics (CFD) technology-based method for optimizing acoustic path of multi-path ultrasonic flowmeter assembled in elbow pipe
  • Computational fluid dynamics (CFD) technology-based method for optimizing acoustic path of multi-path ultrasonic flowmeter assembled in elbow pipe
  • Computational fluid dynamics (CFD) technology-based method for optimizing acoustic path of multi-path ultrasonic flowmeter assembled in elbow pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Below in conjunction with accompanying drawing of description, the present invention is described in conjunction with the simulation optimization example of field experiment, concrete steps are as follows figure 1 Shown:

[0025] 1) According to the data provided by the experimental site, the inner diameter of the pipeline is d=399.489mm, the radius of curvature of the elbow is 440mm, the inlet flow velocity is 0.3m / s~4m / s, the fluid is water, and the ambient temperature is 19.7°; calculated by looking up the table The kinematic viscosity of water at this temperature v=1.007×10-6m2 / s, calculated by the Reynolds number formula It can be seen that the Reynolds number is between 1.19×105-1.59×106; it is calculated by the Dean number formula It can be seen that Dean's number is 1.13×10 5 -1.52×10 6 between; since the test pipelines are all smooth tubes, according to the revised Prandtl smooth tube formula Calculate the drag coefficient λ along the way between 0.013-0...

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 computational fluid dynamics (CFD) technology-based method for optimizing an acoustic path of a multi-path ultrasonic flowmeter assembled in an elbow pipe. The method mainly comprises the following steps: calculating a Reynolds number, a Dean number and a boundary layer thickness according to pipeline conditions; modeling a pipeline and the flowmeter by utilizing three-dimensional modeling software, and assembling a pipeline model and a flowmeter model according to different assembly angles; selecting CFD software, and introducing the assembled models and setting parameters; simulating the flow field distribution of different flow speeds, recording the average flow rate at an inlet, and calculating the flow rate of the section of the acoustic path; linearly fitting the calculated flow rate errors of each group, and correcting the errors of each group according to the fit slope; screening the group with the minimum error fluctuation range in the flow speed range, and taking the acoustic path section, acoustic path number and assembly angles of the group as an optimal acoustic distribution scheme under the pipeline characteristic condition. The CFD technology-based method for optimizing the acoustic path of the multi-path ultrasonic flowmeter assembled in the elbow pipe can be used for guiding to reasonably select the acoustic path number measurement section and assembly angles of the multi-path ultrasonic flowmeter under an assembly condition without a straight pipe section.

Description

technical field [0001] The invention relates to an acoustic path optimization method for installing a multi-acoustic ultrasonic flowmeter in an elbow section based on CFD technology, especially referring to the use of CFD software to simulate the flow field distribution in an elbow and adjust various parameters of the multi-acoustic ultrasonic flowmeter. The test accuracy of the multi-sound path ultrasonic flowmeter can adapt to the distribution of the flow field. Background technique [0002] With the global shortage of energy and water resources, a number of large-scale water conservancy projects and water diversion projects related to the national economy and people's livelihood have developed rapidly in my country, such as the Three Gorges Water Conservancy Project and the South-to-North Water Diversion Project. These engineering projects often include pipelines with huge caliber and flow rate, such as water inlet pipelines of hydropower units, which cannot be adapted by...

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): G01F1/66
Inventor 何存富刘飞吴斌焦敬品张力新樊尚春
Owner BEIJING UNIV OF TECH
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