Li Xiyuan

Publications

1 Analysis on Influence of Gravity on Convection Heat Transfer in Manned Spacecraft during Terrestrial Test

Authors: Wang Jing, Pei Yifei, Tao Tao, Li Xiyuan

Abstract:

How to simulate experimentally the air flow and heat transfer under microgravity on the ground is important, which has not been completely solved so far. Influence of gravity on air natural convection results in convection heat transfer on ground difference from that on orbit. In order to obtain air temperature and velocity deviations of manned spacecraft during terrestrial thermal test, dimensionless number analysis and numerical simulation analysis are performed. The calculated temperature distribution and velocity distribution of the horizontal test cases are compared to the vertical cases. The results show that the influence of gravity is neglected for facility drawer racks and more obvious for vertical cabins.

Keywords: Numerical Simulation, Gravity, convection heat transfer, Manned spacecraft, Dimensionless number

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1370

Abstracts

1 Simulation and Experimentation Investigation of Infrared Non-Destructive Testing on Thermal Insulation Material

Authors: Li Xiyuan, Bi Yan-Qiang, Shang Yonghong, Lin Boying, Ji Xinyan

Abstract:

The heat-resistant material has important application in the aerospace field. The reliability of the connection between the heat-resisting material and the body determines the success or failure of the project. In this paper, lock-in infrared thermography non-destructive testing technology is used to detect the stability of the thermal-resistant structure. The phase relationship between the temperature and the heat flow is calculated by the numerical method, and the influence of the heating frequency and power is obtained. The correctness of the analysis is verified by the experimental method. Through the research, it can provide the basis for the parameter setting of heat flux including frequency and power, improve the efficiency of detection and the reliability of connection between the heat-resisting material and the body.

Keywords: Reliability, connection, infrared non-destructive, thermal insulation material

Procedia PDF Downloads 243