ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 1 July 2012
Page Count: 5

Experimental Study of Thermal Contact Conductance Based on Heat-Transfer Theory with Variable Thermal Conductivity

Wang, Zong Ren
School of Reliability and System Engineering, Beijing Univ. of Aeronautics and Astronautics, Beijing,

Yang, Jun
School of Reliability and System Engineering, Beijing Univ. of Aeronautics and Astronautics, Beijing,

Yang, Mingyuan
School of Reliability and System Engineering, Beijing Univ. of Aeronautics and Astronautics, Beijing,

Zhang, Weifang
School of Reliability and System Engineering, Beijing Univ. of Aeronautics and Astronautics, Beijing,

(Received 9 August 2011; accepted 17 February 2012)

Abstract

To calculate the interface temperature drop ΔT during the thermal contact conductance (TCC) testing, an optimization computing method based on the one-dimensional steady heat-transfer theory with variable thermal conductance is proposed in this paper. This method takes into account the physical process of heat transfer adequately, which can calculate the temperature drop (ΔT) accurately. Besides, a practical engineering example is utilized to demonstrate the applicability of the proposed approach. By using the optimization computing method along with traditional linear fitting method, the testing values of TCC obtained from the interfaces of the structural materials GH4169 and K417 used in aero-engines are studied and compared. The results show that there are large errors and poor stability in the traditional linear fitting method, and the relative errors of these two methods vary from about 3 % to 17 %.

Keywords:
thermal contact conductance (TCC), thermal contact resistance (TCR), temperature compensation; optimization, aero-engine

Paper ID: JTE104272
DOI: 10.1520/JTE104272
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