Infrared and Laser Engineering, Volume. 53, Issue 9, 20240226(2024)
Analysis of heat transfer characteristics of 2nd temperature zone of cryogenic optical system with thermal resistance control method
Figures & Tables(14)
Fig. 1. Model of dual-temperature zone of cryogenic optical system
Fig. 2. (a) Sectional drawing of assemble model of mechanical structure used for thermal resistance control; (b) Model of heat insulated pad; (c) Model of screw model; (d) Model of screw sleeve
Fig. 3. Schematic diagram of heat transfer of dual-temperature zone of cryogenic optical system
Fig. 6. Comparison of computed results of 1D mathematical model with the experimental results (simple1, simple3 and simple4)
Fig. 7. Comparison of computed results of 1D mathematical model with the experimental results (simple2 and simple3)
Fig. 8. The plots of temperature of 2nd temperature zone for various lengths of screw, heights of screw sleeve, heights of heat insulated pad and thickness of heat insulated pad (screw and screw sleeve are made of 4J36)
Fig. 9. The plots of heat leakage of 2nd temperature zone for various lengths of screw, heights of screw sleeve, heights of heat insulated pad and thickness of heat insulated pad (screw and screw sleeve are made of 4J36)
Fig. 10. The plots of temperature of 2nd temperature zone for various lengths of screw, heights of screw sleeve, heights of heat insulated pad and thickness of heat insulated pad (screw and screw sleeve are made of TC4)
Fig. 11. The plots of heat leakage of 2nd temperature zone for various lengths of screw, heights of screw sleeve, heights of heat insulated pad and thickness of heat insulated pad (screw and screw sleeve are made of TC4)
Fig. 12. The plots of heat load on 2nd temperature zone varied with target temperature of 2nd temperature zone
Table 1. Geometric parameters of mechanical structure used for thermal resistance control
View tableView in ArticleTable 1. Geometric parameters of mechanical structure used for thermal resistance control
Geometric parameter Value Screw diameter, Dscr/mm 4 Length of screw, Lscr/mm 16, 18, 20, 24, 27 Height of heat insulated pad, HPI/mm 1, 3, 5 Height of screw sleeve, Hsle/mm 1, 5, 8 Thickness of heat insulated pad, tPI/mm 1.35, 3, 5, 7, 9
Table 2. Parameters of samples
View tableView in ArticleTable 2. Parameters of samples
Serial number Temperature of vacuum chamber/K Assembly methods between flexible thermal link and 2nd temperature zone Geometric parameters of thermal resistance Sample1 293.15 4J36 screw, thermal conductive filler (indium) - Sample2 253.15 4J36 screw, 4J36 screw sleeve, PI heat insulated pad Lscr = 20 mm, HPI = 5 mm, Hsle = 1 mm, tPI= 1.35 mm Sample3 293.15 4J36 screw, 4J36 screw sleeve, PI heat insulated pad Lscr = 20 mm, HPI = 5 mm, Hsle = 1 mm, tPI= 1.35 mm Sample4 293.15 TC4 screw, TC4 screw sleeve, PI heat insulated pad Lscr = 27 mm, HPI = 5 mm, Hsle = 8 mm, tPI=1.35 mm
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Chao QI, Enguang LIU, Baoyu YANG, Guoqing LIU. Analysis of heat transfer characteristics of 2nd temperature zone of cryogenic optical system with thermal resistance control method[J]. Infrared and Laser Engineering, 2024, 53(9): 20240226
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Received: May. 28, 2024
Accepted: --
Published Online: Oct. 22, 2024
The Author Email: LIU Enguang (liuenguang@mail.sitp.ac.cn), YANG Baoyu (byyang@mail.sitp.ac.cn)
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