2001 Fiscal Year Final Research Report Summary
Thermal-Fluid Mechanism of Double Diffusive Convection in LNG Model Tank Exposed to a Fire Environment
| Project/Area Number |
12650198
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Shinshu University |
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Principal Investigator |
HINATA Shigeru Shinshu University, Faculty of Textile Sience and Technology, Professor, 繊維学部, 教授 (80007020)
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| Co-Investigator(Kenkyū-buntansha) |
SAKURAI Masayuki Shinshu University, Faculty of Textile Sience and Technology, Associate Professor, 繊維学部, 助教授 (30021166)
HIMENO Nobuhiro Shinshu University, Faculty of Textile Sience and Technology, Associate Professor, 繊維学部, 助教授 (20114887)
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| Project Period (FY) |
2000 – 2001
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| Keywords | Natural convection / Stably stratified layer / Double diffusive convection / Heat transfer / LNG tank / Rollover phenomenon / Boiloff |
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| Research Abstract |
The modeling method used to evaluate the thermal response of a stably stratified LNG tank exposed to a fire environment is report. The experiments are carried out in a rectangular LNG model tank heated partially from the sidewall with a uniform heat flux. The liquid layers composed of the upper layer of water and the lower layer of sucrose aqueous solution are set up in the full and partially filled tank. The vertical temperature profiles in liquid are measured by the bundled thermocouples. The characteristics of temperature at the free surface of liquid rising with the lapse of time are discussed. The numerical analysis of laminar natural convection is also performed. A Galerkin finite element method is employed. Computations are carried out for Pr=7, Le=300, Ra*=2 x 10^6 corresponding to the experimental conditions. The numerical results are compared with the experimental data. Both on qualitative arid quantitative arguments, a satisfactory agreement is obtained.
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Research Products
(2 results)
