English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Thermal fatigue may occur in a pipe with high temperature stratified flow. To avoid the fatigue damage by the stratified flow, it is important to know a history of temperature and thermal stress distribution in the pipe. This paper describes a heat conduction inverse analysis method using a plate model as a basic study for estimation of a temperature history on the inner surface of an elbow where a thermal stratification occurs. It was made clear that the relation between the surface temperature and the other surface temperature of the plate model was characterized by the reduction ratio of an amplitude R and time delay t dependent on the cycle of the temperature history. The reduction rate R and time delay t may change with the boundary condition. Therefore, it is necessary to calculate R and t numerically in accordance with the boundary condition. The surface temperature history was estimated by dividing the magnitude of the other surface temperature by the reduction ratio R and by advancing the time by the time delay t. It was found that the surface temperature history was estimated with good accuracy by the inverse analysis method proposed in this study.

Development of inverse analysis method using a plate model for estimation of temperature distribution history of an elbow with thermal stratification