Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for detecting evaporation process of droplet particles and measuring evaporation rate of droplet particles

A technology of evaporation rate and measurement method, which is applied in measurement devices, particle size analysis, particle and sedimentation analysis, etc. It can solve the problems affecting the measurement accuracy of droplet evaporation rate and inaccurate particle diameter, and achieve strong practicability and high measurement accuracy. , the effect of high measurement accuracy

Inactive Publication Date: 2018-10-12
TIANJIN UNIV
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the case where the refractive index changes with the particle size, such as spray combustion field, if the refractive index is regarded as a constant, the calculated particle diameter is inaccurate, which affects the measurement accuracy of the droplet evaporation rate

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
  • Method for detecting evaporation process of droplet particles and measuring evaporation rate of droplet particles
  • Method for detecting evaporation process of droplet particles and measuring evaporation rate of droplet particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below.

[0022] A kind of detection method of droplet particle evaporation process and its evaporation rate, see figure 1 and figure 2 , the measurement method includes the following steps:

[0023] 1. Build the optical system

[0024] according to figure 2 Build an optical path system, including: laser 1, beam expander collimation system 2, beam compression system 3, beam splitter 4, first mirror 5, second mirror 6 and third mirror 7, particles 8, imaging lens 9 , CCD 10.

[0025] Laser 1 is a vertically polarized semiconductor laser with a wavelength of λ=532nm and a maximum power of 1.5W. The thin beam emitted by the laser 1 is expanded, filtered, and collimated by the beam expander and collimator system 2 to form a circular beam with a diameter of 20mm;

[0026] Then the beam...

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 method for detecting an evaporation process of droplet particles and measuring the evaporation rate of the droplet particles. The spherical droplet particles are illuminatedby two equal-intensity lamellar light beams oppositely, a focused two-point image or interference fringe pattern formed by scattered light of the particles is recorded in a 90-DEG scattering angle region, and the particle diameter d is obtained; a change relationship curve (d-t) of the particle size with the time is obtained according to the time-sequence focused two-point image or interference fringe pattern, and the droplet evaporation process is detected; the droplet evaporation rate is obtained by fitting the d2-t curve; the particle sizes at different times are squared and then subtracted, and the average evaporation rate of the droplets is calculated by the square difference of the particle sizes and the time intervals; the surface area and volume of the droplets at the time t are calculated, and the evaporation rate per unit surface area is calculated according to the surface area and volume changes of the droplets. The non-contact measurement has the advantages of simple principle, high measurement accuracy, high practicability and the like, and can be used for evaporation process and evaporation rate measurement of the droplet particles in spray atomization, spray combustion fields and chemical processes.

Description

technical field [0001] The invention relates to the field of droplet evaporation process and its evaporation rate measurement field, in particular to a detection method of droplet particle evaporation process and its evaporation rate measurement method. Background technique [0002] Droplet evaporation is a basic physical phenomenon in the process of spraying, chemical industry, etc. Accurately grasping the process of droplet evaporation and its laws is of great significance for improving production efficiency, energy saving, environmental protection and process stability. The detection of the droplet evaporation process is usually realized according to the size change of the droplet particle. Various measurement techniques and methods based on different measurement principles and suitable for different measurement objects have been proposed. Based on optical measurement methods mainly include: [0003] Imaging method, this method is to record the images of droplet particle...

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): G01N15/02
CPCG01N15/0211G01N15/0227
Inventor 吕且妮尉小雪李子璇
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com