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Thermal analysis and cooling structure design of the primary collimator in CSNS/RCS

Chinese Physics C 2013年第5期37卷 76-80页

作者：邹易清王娜康玲屈化民何哲玺余洁冰 Institute of High Energy Physics Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences

The rapid cycling synchrotron （RCS） of the China Spallation Neutron Source （CSNS） is a high intensity proton ring with beam power of 100 kW. In order to control the residual activation to meet the requirements of hands-on maintenance, a two-stage collimation system has been designed for the RCS. The collimation system consists of one primary collimator made of thin metal to scatter the beam and four secondary collimators as absorbers. Thermal analysis is an important aspect in evaluating the reliability of the collimation system. The calculation of the temperature distribution and thermal stress of the primary collimator with different materials is carried out by using ANSYS code. In order to control the temperature rise and thermal stress of the primary collimator to a reasonable level, an air cooling structure is intended to be used. The mechanical design of the cooling structure is presented, and the cooling efficiency with different chin numbers and wind velocity is also analyzed. Finally, the fatigue lifetime of the collimator under thermal shocks is estimated.

关键词： primary collimator cooling structure thermal analysis fatigue lifetime

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Effect of cooling structure on thermal behavior of copper plates of slab continuous casting mold

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Journal of Central South University 2013年第2期20卷 318-325页

作者：孟祥宁朱苗勇 School of Materials and Metallurgy Northeastern University

A three-dimensional finite-element model of slab continuous casting mold was conducted to clarify the effect of cooling structure on thermal behavior of copper plates. The results show that temperature distribution of hot surface is mainly governed by cooling structure and heat-transfer conditions. For hot surface centricity, maximum surface temperature promotions are 30 ℃and 15 ℃ with thickness increments of copper plates of 5 mm and nickel layers of 1 ram, respectively. The surface temperature without nickel layers is depressed by 10 ℃ when the depth increment of water slots is 2 mm and that with nickel layers adjacent to and away from mold outlet is depressed by 7℃ and 5 ℃, respectively. The specific trend of temperature distribution of transverse sections of copper plates is nearly free of cooling structure, but temperature is changed and its law is similar to the corresponding surface temperature.

关键词： slab continuous casting mold copper plate cooling structure thermal behavior finite element analysis

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