Abstract：A study of the chaotic behavior of liquefied natural gas (LNG) after stratification in the main stream region of a storage tank was conducted. Based on non-linear dynamics, a 2-dimensional Rayleigh-Benard convection model was developed to simulate the convection, Lorenz equations of LNG convection were deduced from conservation equations, and the Runge-Kutta method was used to solve the equations. The results showed that when Pr = 1.33, 106 < r < 1470, chaos was obtained, which meant that the velocity field and the temperature field were highly unsteady. In addition, the influence of temperature and scale factor on the solutions and the corresponding range of parameters were studied. The results revealed that the chaos in LNG convection resulted from the interaction of buoyancy and viscid forces. A small quantity of heat impacting the storage tank would lead to a strong and unstable convection of LNG in the main stream region.
出版日期: 2008-12-05
引用本文:
. Chaotic behavior of LNG after stratification
in main stream region of storage tank[J]. Frontiers of Energy and Power Engineering in China, 2008, 2(4): 514-518.
WANG Jingjing, MA Xiaoqian. Chaotic behavior of LNG after stratification
in main stream region of storage tank. Front. Energy, 2008, 2(4): 514-518.
Lin Wensheng, Gu Anzhong . Current research situationof the safety in the storage and transportation of combustible gases. Natural Gas Industry, 2001, 21(5): 87–91 (in Chinese)
2
Lu Xuesheng, Wang Shunhua . The security issues in theLNG storage. Cryogenic Technology, 2000, (6): 12–14 (in Chinese)
3
Birk A M, Cunningham M H . Liquid temperature stratificationand its effect on BLEVEs and their hazards. Journal of Hazardous Materials, 1996, 48(1–3): 219–237. doi:10.1016/0304-3894(95)00157-3
4
Gong Yanwu, Lin Wensheng, Gu Anzhong . The influence of Thermal stratification on BLEVE in LPGvessel. Industrial Heating, 2002, (5): 14–20 (in Chinese)
5
Gong Yanwu, Lin Wensheng, Gu Anzhong . Study on the Influence of Stratification on pressurizationof LPG vessel. Oil &Gas Storage andTransportation, 2002, 21(11): 28–31, 59 (in Chinese)
6
Gong Yanwu, Lin Wensheng, Zhang Rongrong . Experimental study on the influence of thermal stratificationon BLEVE. Journal of Engineering Thermophysics, 2004, 25(6): 925–928 (in Chinese)
7
Gu Anzhong . Technical of Liquefied Natural Gas. Beijing: China Machine Press, 2004, 228–229 (in Chinese)
8
Ma Xiaoqian . Nonlinear Mechanism and Intelligent Evaluation of Safety for LNGStorage and Transport. Natural Gas Industry, 2003, 23(6): 123–126 (in Chinese)
9
Li Pinyou, Gu Anzhong . Theoretical study on liquefiednatural gas rollover. Journal of Hydrodynamics, 2000, 15(2): 182–190 (in Chinese)
10
Guo Zengyuan . Thernal hydromechanics. Beijing: Tsinghua University Press, 1993, 181–183 (in Chinese)
11
Malasoma J M, Werny P . Multichannel type-I intermittencyin two models of Rayleigh- Benard convection. Chaos, Solitons and Fractals, 2003, 15(3): 487–500. doi:10.1016/S0960-0779(02)00125-X
12
Cross M . Theoreticalmodeling of spiral chaos in rayleigh-benard convection. Physica D, 1996, 97(1): 65–80. doi:10.1016/0167-2789(96)00144-3
13
Hu Yinqiao . Atmosphere Thermal Dynamic Introductory-Atmosphere Unbalance StateLinear and Nonlinear Thermal Dynamics. Beijing: Geology Press. 2002, 366–368 (in Chinese)
14
Liu Shishi, Liu Shida . Nonlinear Atmosphere Dynamics. Beijing: National Defense Industry Press, 1996, 187–189 (in Chinese)
15
Lorenz E N . Deterministic nonperiodic flow. AtmosSci, 1963, 20(1): 130–141. doi:10.1175/1520-0469(1963)020<0130:DNF>2.0.CO;2
16
Yang Shiming, Tao Wenquan . Heat Transfer. Beijing: Higher Education Press, 1998, 182 (in Chinese)
