Identification of three-dimensional transient temperature fields in thick-walled elements using the inverse method

Abstract

Purpose The purpose of this paper is to propose a method of determining the transient temperature of the inner surface of thick-walled elements. The method can be used to determine thermal stresses in pressure elements. Design/methodology/approach An inverse marching method is proposed to determine the transient temperature of the thick-walled element inner surface with high accuracy. Findings Initially, the inverse method was validated computationally. The comparison between the temperatures obtained from the solution for the direct heat conduction problem and the results obtained by means of the proposed inverse method is very satisfactory. Subsequently, the presented method was validated using experimental data. The results obtained from the inverse calculations also gave good results. Originality/value The advantage of the method is the possibility of determining the heat transfer coefficient at a point on the exposed surface based on the local temperature distribution measured on the insulated outer surface. The heat transfer coefficient determined experimentally can be used to calculate thermal stresses in elements with a complex shape. The proposed method can be used in online computer systems to monitor temperature and thermal stresses in thick-walled pressure components because the computing time is very short.

Numerical model of the steam pipeline with thermal insulation

“…The stresses resultant from the internal pressure was determined used measured pressure changes. Jaremkiewicz (2018) proposed a method of determining the transient temperature of the inner surface of thick-walled elements. The thermal stresses in the pressure components can be determined by this method.…”

Three-dimensional transient inverse heat conduction problems in the enhanced pool boiling heat transfer

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