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

Method for numerical simulation of steam condensation containing incoagulable gas in pipe

A technology for condensing gas and steam, which is used in electrical digital data processing, special data processing applications, instruments, etc., and can solve problems such as inability to apply engineering practice and large computational load

Inactive Publication Date: 2008-06-18
SHANGHAI JIAO TONG UNIV
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a large amount of calculation and is suitable for scientific research, but not for engineering practice.

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 numerical simulation of steam condensation containing incoagulable gas in pipe
  • Method for numerical simulation of steam condensation containing incoagulable gas in pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] In order to better understand the technical solution of the present invention, the following will be further described in conjunction with the accompanying drawings and specific examples. The embodiment is to support, rather than limit, the technical features of the present invention.

[0025] The physical model involved in the present invention is a vertical condensation pipe built by Revankar et al. of Purdue University in the United States in order to study the condensation of vapor containing non-condensable gas in the vertical pipe. The physical model of this experiment studies a vertical condenser tube with an axial length (x direction) of 640mm and an inner diameter (D) of 32mm, which is filled with saturated steam of 1 atmosphere from top to bottom, which contains 1% of the mass of air, that is, mass Fraction α=0.01, mixed gas Reynolds number Re=4×10 4 .

[0026] Because the physical model of the experiment is simple, and the data is detailed and representative...

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 relates to a simulation method of steam condensation number of non-condensable gas in a pipe and pertains to the mechanics field of computational fluid. The invention makes use of the CFX platform and sets source term of quality continuous equation of steam components to simulate the steam condensation process of non-condensable gas. The steps are: (1) the fluid in the flow field is set as gas mixture with changeable component mass percentage and all components respectively show steam and non-condensable gas and are in ideal state; (2) boundary conditions such as flow field area, inlet, outlet and wall are set; (3) the continuous governing equation of steam components is added with Uchida empirical correlation in the source phase of wall boundary conditions. The method of the invention makes a slight alteration on the basis of the existing calculation program of the finite volume method and accurately simulates the complex process of the change between the two phases of the steam condensation of the non-condensable gas. The treatment process is simple and efficient.

Description

technical field [0001] The invention relates to a method in the field of computational fluid dynamics, in particular to a numerical simulation method for condensing steam containing non-condensable gas in a steam pipeline, that is, by calculating the fluid dynamics control equations of an additional condensation model. Background technique [0002] In many industrial situations, steam condensation with energy transfer is a very important physical process. However, when there is non-condensable gas (such as air) in the steam, even if its content is extremely small, it will obviously deteriorate the heat transfer of the working fluid. [0003] The current research on steam condensation in the presence of non-condensable gases is mainly divided into two categories: theoretical research and experimental analysis: (1) The governing equation model of the boundary layer and liquid film, the theory believes that the concentration difference and temperature in the steam The differen...

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): G06F17/50
Inventor 程先华文杰亓永程鹏亮
Owner SHANGHAI JIAO TONG 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