Full-flow direction flow velocity measurement probe and measurement method thereof

A technology of flow velocity measurement and measurement method, applied in fluid velocity measurement, velocity/acceleration/impact measurement, measurement device, etc., can solve the problems of large measurement error, high price, error-prone, etc., and achieve the expansion of flow measurement range, formula algorithm Simple, precise, low-cost effects

Inactive Publication Date: 2012-08-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF3 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Pitot tube has a simple structure, but when measuring, the Pitot tube requires that the angle between the incoming flow and its axis does not exceed 5 degrees, otherwise the measurement error will be large
Five-hole and seven-hole probes can realize the measurement of more complex flo

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
  • Full-flow direction flow velocity measurement probe and measurement method thereof
  • Full-flow direction flow velocity measurement probe and measurement method thereof
  • Full-flow direction flow velocity measurement probe and measurement method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The invention utilizes the characteristics of the fluid flowing around the blunt body, uses the pressure-taking holes on the spherical surface to measure the pressure distribution on the blunt body surface, and then uses the wind tunnel calibration coefficient to calculate the velocity and direction of the fluid.

[0030] Before using the invention, wind tunnel calibration is required; the probe is placed in a uniform incoming flow, and the total static pressure coefficient and angle coefficient are calibrated under the condition of known velocity and angle. During the calibration process, the flow area is divided into six areas, namely: Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ, Ⅵ area. Each area has four pressure sensing holes, and the average value of the four pressures is taken as the apparent total pressure, and then combined with other known conditions to calibrate the dimensionless measurement coefficient.

[0031] A method for measuring flow velocity in the full flow direction of the prese...

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 discloses a full-flow direction flow velocity measurement probe and a measurement method of the full-flow direction flow velocity measurement probe, and relates to the field of measurement of fluid velocity and direction. The probe comprises eight pressure measuring holes at the spherical probe head and eight pressure guide tubes led out from the tail of the probe and is characterized in that the probe head is spherical, the eight pressure measuring holes are uniformly distributed on the sphere, and thus when the pressure measuring holes are watched from the forward directions from the front and back, left and right and up and down, four pressure measuring holes are uniformly distributed in the six forward directions. In the measurement process, by taking the apparently maximum total pressure as reference, the zone of the incoming flow is judged, and in combination with the apparent total pressure of the zone, the pressures on the four holes of the zone, the flow velocity coefficient, the angle coefficient and the like, the flow velocity and flow direction are calculated; the flow velocity measurement probe has the advantages of simple structure, low cost, wide flow direction detection range and the like; and the flow velocity measurement probe can be widely applied to the three-dimensional flow field measurement of engineering and scientific research.

Description

technical field [0001] The invention relates to the field of fluid flow measurement, in particular to a method for measuring flow velocity in all flow directions, which can solve the problem of fluid measurement in special and complicated occasions. Background technique [0002] Flow measurement is an important direction of fluid mechanics, and the measurement of velocity and direction of complex flow field is even more difficult in flow measurement. At present, commonly used flow measurement equipment includes Pitot tube, five-hole probe, seven-hole probe, laser Doppler Le measuring instrument, particle image velocimeter, etc. Pitot tube has a simple structure, but when measuring, the Pitot tube requires that the angle between the incoming flow and its axis does not exceed 5 degrees, otherwise the measurement error will be large. Five-hole and seven-hole probes can realize the measurement of more complex flow fields, but their capabilities are limited. Expanding this rang...

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
IPC IPC(8): G01P5/02G01P13/00
Inventor 白亚磊李鹏钟伟谈志晶
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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