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Thermal fatigue on pistons induced by shaped high power laser. Part II: Design of spatial intensity distribution via numerical simulation
Song HW(宋宏伟); Yu G(虞钢); Kaplan Alexander FH; Tan JS; Yu XL; Song, HW (reprint author), Chinese Acad Sci, Inst Mech, Lab Laser Intelligent Mfg, Beijing 100080, Peoples R China.
Source PublicationInternational Journal of Heat and Mass Transfer
2008
Volume51Issue:3-4Pages:768-778
ISSN0017-9310
AbstractIn the laser induced thermal fatigue simulation test on pistons, the high power laser was transformed from the incident Gaussian beam into a concentric multi-circular pattern with specific intensity ratio. The spatial intensity distribution of the shaped beam, which determines the temperature field in the piston, must be designed before a diffractive optical element (DOE) can be manufactured. In this paper, a reverse method based on finite element model (FEM) was proposed to design the intensity distribution in order to simulate the thermal loadings on pistons. Temperature fields were obtained by solving a transient three-dimensional heat conduction equation with convective boundary conditions at the surfaces of the piston workpiece. The numerical model then was validated by approaching the computational results to the experimental data. During the process, some important parameters including laser absorptivity, convective heat transfer coefficient, thermal conductivity and Biot number were also validated. Then, optimization procedure was processed to find favorable spatial intensity distribution for the shaped beam, with the aid of the validated FEM. The analysis shows that the reverse method incorporated with numerical simulation can reduce design cycle and design expense efficiently. This method can serve as a kind of virtual experimental vehicle as well, which makes the thermal fatigue simulation test more controllable and predictable. (C) 2007 Elsevier Ltd. All rights reserved.
KeywordHigh Power Laser Beam Shaping Temperature Field Thermal Fatigue Finite Element
DOI10.1016/j.ijheatmasstransfer.2007.04.034
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000253661600034
WOS KeywordBEAM
WOS Research AreaThermodynamics ; Engineering ; Mechanics
WOS SubjectThermodynamics ; Engineering, Mechanical ; Mechanics
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/26122
Collection力学所知识产出(1956-2008)
Corresponding AuthorSong, HW (reprint author), Chinese Acad Sci, Inst Mech, Lab Laser Intelligent Mfg, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
Song HW,Yu G,Kaplan Alexander FH,et al. Thermal fatigue on pistons induced by shaped high power laser. Part II: Design of spatial intensity distribution via numerical simulation[J]. International Journal of Heat and Mass Transfer,2008,51(3-4):768-778.
APA Song HW,Yu G,Kaplan Alexander FH,Tan JS,Yu XL,&Song, HW .(2008).Thermal fatigue on pistons induced by shaped high power laser. Part II: Design of spatial intensity distribution via numerical simulation.International Journal of Heat and Mass Transfer,51(3-4),768-778.
MLA Song HW,et al."Thermal fatigue on pistons induced by shaped high power laser. Part II: Design of spatial intensity distribution via numerical simulation".International Journal of Heat and Mass Transfer 51.3-4(2008):768-778.
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