Method for correcting thermophysical parameters and absorptivity of material

A technology of thermophysical parameters and correction methods, applied in the direction of material thermal development, etc., can solve the problems of complex and inapplicable measuring devices

Inactive Publication Date: 2012-05-23
INST OF MECHANICS - CHINESE ACAD OF SCI
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, such as complex measuring devices and unsuitability for high-density lasers, so as to provide a simple material thermal property test for pistons or cylinder heads that is suitable for high-density lasers. Correction method for parameters and absorbance

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 correcting thermophysical parameters and absorptivity of material
  • Method for correcting thermophysical parameters and absorptivity of material
  • Method for correcting thermophysical parameters and absorptivity of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings and examples. The present invention provides a correction method for the thermal physical parameters and absorption rate of materials used in the cylinder head or piston laser thermal load test, which mainly adopts the combination of experiment and simulation calculation. Methods.

[0034] 1. Determine the materials and basic laser beam parameters required for experiments and simulation calculations

[0035] 2. Calibration:

[0036] 1. Adjust the angle of the laser head so that the beam can act vertically on the surface of the cylinder head or piston. And test the initial cylinder head temperature.

[0037] 2. Calibration test

[0038] The correction test includes three parts: small spot correction experiment, simulation calculation, and large spot correction test that completely covers the fire surface.

[0039] 1) Small spot correction test: In the small s...

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 correcting thermophysical parameters and the absorptivity of a material for laser thermal load tests of a cylinder cover or a piston. According to the method, experiments and simulation calculations are combined, and a group of the thermophysical parameters and the absorptivity of the material for the laser thermal load of the cylinder cover or the piston can be finally determined through multitime experiments and simulation calculations. The method has the characteristics of low cost, high efficiency and high simulation reliability.

Description

technical field [0001] The invention relates to a method for correcting the thermophysical parameter and absorption rate of a cylinder head or a piston, in particular to a method for correcting the thermophysical parameter and absorption rate of a material using laser as a heat source. Background technique [0002] At present, there are generally two methods for measuring thermal properties of materials: steady-state method and transient method. When the temperature exceeds 1000K (equivalent to 726.85°C) in the classic steady-state calorimetry, the thermal equilibrium time is generally very long. In some cases, chemical reactions will occur in the sample, and the environmental control and thermal calculation are very complicated. The pulse heating transient measurement method is currently widely used, but the general measurement device is more complicated. [0003] There are three main types of methods for measuring the absorptivity: the first type is to obtain the absorpti...

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): G01N25/20
Inventor 虞钢聂树真郑彩云何秀丽宁伟健
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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