Inverse analysis of inner surface temperature history from outer surface temperature measurement of a pipe

2010 ◽  
Vol 10 ◽  
pp. 012188 ◽  
Author(s):  
S Kubo ◽  
S Ioka ◽  
S Onchi ◽  
Y Matsumoto
Keyword(s):  
Surface Temperature ◽  
Temperature Measurement ◽  
Outer Surface ◽  
Inverse Analysis ◽  
Temperature History ◽  
Surface Temperature Measurement ◽  
Inner Surface

Development of Inverse Analysis of Heat Conduction and Thermal Stress for Elbow: Part I

2013 ◽  
Author(s):  
Seiji Ioka ◽  
Shiro Kubo ◽  
Mayumi Ochi ◽  
Kiminobu Hojo
Keyword(s):  
Heat Conduction ◽  
Thermal Stress ◽  
Transfer Function ◽  
Surface Temperature ◽  
Outer Surface ◽  
Inverse Analysis ◽  
Temperature History ◽  
Analysis Method ◽  
Inner Surface ◽  
Inverse Analysis Method

Thermal fatigue may develop in piping elbow with high temperature stratified flow. To prevent the fatigue damage by stratified flow, it is important to know the distribution of thermal stress and temperature history in a pipe. In this study, heat conduction inverse analysis method for piping elbow was developed to estimate the temperature history and thermal stress distribution on the inner surface from the outer surface temperature history. In the inverse analysis method, the inner surface temperature was estimated by using the transfer function database which interrelates the inner surface temperature with the outer surface temperature. Transfer function database was calculated by FE analysis in advance. For some patterns of the temperature history, inverse analysis simulations were made. It was found that the inner surface temperature history was estimated with high accuracy.

Development of Inverse Analysis of Heat Conduction and Thermal Stress for Elbow (Part I)

2016 ◽  
Vol 138 (5) ◽  
Author(s):  
Seiji Ioka ◽  
Shiro Kubo ◽  
Mayumi Ochi ◽  
Kiminobu Hojo
Keyword(s):  
Heat Conduction ◽  
Surface Temperature ◽  
Inverse Analysis ◽  
Power Plants ◽  
Fatigue Cracking ◽  
Stratified Flow ◽  
Temperature History ◽  
Inverse Heat Conduction ◽  
Analysis Method ◽  
Inner Surface

High temperature stratified flow sometimes caused thermal fatigue cracking in power plants. To prevent fatigue damage by stratified flow, it is important to know temperature distribution history in a pipe. In this study, inverse heat conduction analysis method for an elbow model was developed to estimate the inner surface temperature from the measured outer surface temperature. In the method, the transfer function database inter-relating the inner surface temperature with the outer one was used. For several patterns of the temperature history, the inverse analysis simulations were performed and the accuracy of the estimated inner surface temperature was shown.

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