Low-surface-temperature jump behavior of C/SiC composites prepared via precursor impregnation and pyrolysis in high-enthalpy plasma flows

2021 ◽  
Vol 41 (15) ◽  
pp. 7601-7609
Author(s):  
Xing Zhao ◽  
Yejie Cao ◽  
Liuyang Duan ◽  
Zhenbao Li ◽  
Yiguang Wang
Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5254
Author(s):  
Shizhong Zhang ◽  
Qiu Wang ◽  
Jinping Li ◽  
Xiaoyuan Zhang ◽  
Hong Chen

Coaxial thermocouples have the advantages of fast response and good durability. They are widely used for heat transfer measurements in transient facilities, and researchers have also considered their use for long-duration heat transfer measurements. However, the model thickness, transverse heat transfer, and changes in the physical parameters of the materials with increasing temperature influence the accuracy of heat transfer measurements. A numerical analysis of coaxial thermocouples is conducted to determine the above influences on the measurement deviation. The minimum deviation is obtained if the thermal effusivity of chromel that changes with the surface temperature is used to derive the heat flux from the surface temperature. The deviation of the heat flux is less than 5.5% when the Fourier number is smaller than 0.255 and 10% when the Fourier number is smaller than 0.520. The results provide guidance for the design of test models and coaxial thermocouples in long-duration heat transfer measurements. The numerical calculation results are verified by a laser radiation heating experiment, and heat transfer measurements using coaxial thermocouples in an arc tunnel with a test time of several seconds are performed.


2019 ◽  
Vol 100 (3) ◽  
Author(s):  
Sung Min Jo ◽  
Oh Joon Kwon ◽  
Jae Gang Kim

Carbon ◽  
2014 ◽  
Vol 71 ◽  
pp. 102-119 ◽  
Author(s):  
Francesco Panerai ◽  
Bernd Helber ◽  
Olivier Chazot ◽  
Marianne Balat-Pichelin

2014 ◽  
Vol 49 (13) ◽  
pp. 4530-4543 ◽  
Author(s):  
Bernd Helber ◽  
Cem O. Asma ◽  
Yacine Babou ◽  
Annick Hubin ◽  
Olivier Chazot ◽  
...  

1999 ◽  
Vol 891 (1 HEAT AND MASS) ◽  
pp. 360-367
Author(s):  
ANDREI A. BELEVTSEV ◽  
RUBEN R. GRIGOR'YANTS ◽  
EMIN KH. ISAKAEV ◽  
PETER P. IVANOV ◽  
ALEXANDER V. MARKIN ◽  
...  
Keyword(s):  

2014 ◽  
Vol 7 (1) ◽  
pp. 155-172 ◽  
Author(s):  
Y. Babou ◽  
D. Lequang ◽  
O. Chazot ◽  
S. T. Surzhikov ◽  
A.S. Dikaljuk ◽  
...  

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