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Indexed by:期刊论文

Date of Publication:2015-04-25

Journal:APPLIED THERMAL ENGINEERING

Included Journals:SCIE、EI、Scopus

Volume:81

Page Number:154-160

ISSN No.:1359-4311

Key Words:Water-cooling mirror; Optimized design; Finite element analysis; Thermal deformation

Abstract:Thermal deformation of water-cooling mirror with straight flow channels is investigated using a coupled thermo-mechanical finite element model. A new optimized design method and a novel structure for the mirror are proposed to alleviate the influence of thermal deposition on the optical performance. A comparative analysis of the temperature rise and thermal deformation of the mirror surface before and after optimization is carried out. The numerical analysis results reveal that though the peak temperature is reduced by only about 1 K, the thermal distortion on the irradiated region decreases from over 80 nm to less than 40 um after optimization. It is demonstrated that the thermal distortion of the mirror surface can be reduced through accelerating and suppressing the heat transfer ability at the central region and periphery region of mirror surface respectively. (C) 2015 Elsevier Ltd. All rights reserved.