Flow Field and Effects of SF6 Released in Ionosphere
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摘要: 在电离层中释放六氟化硫时,释放初期的六氟化硫流速及流量等条件是影响释放效应仿真的重要因素,对仿真结果的准确性具有一定的影响.传统的六氟化硫释放引起的电离层效应仿真中并未讨论.基于Fluent流场仿真软件,针对不同释放初始条件并结合六氟化硫容器的结构,对六氟化硫释放过程中温度、压强以及喷口流速、流量等参数变化情况进行仿真计算,得到了以上参量在释放过程中的变化情况,并将其作为电离层化学物质释放三维动力学模型的初始参数,获得了更加精确的六氟化硫电离层释放效应仿真结果.Abstract: The initial velocity and mass flow rate of sulfur hexafluoride (SF6) released in the ionosphere are key factors for the release effects research. They are not involved in traditional simulation models. In order to realize high precision simulation, the flow field in the storage vessel during SF6 release is studied. According to the structural size of the SF6 storage vessel, the geometric model is established, and the grid model uses structured grid and unstructured grid to discretize the computational area of the geometric model. Using the standard k-ε model and SIMPLE algorithm in the professional software Fluent, the temperature, pressure, velocity of flow and mass flow rate in the storage vessel during SF6 ionosphere release are simulated under different initial conditions, including initial temperature, pressure and filling mass. The flow field simulation results are taken as initial parameters in the three-dimensional refined model of SF6 ionosphere release, and the refined effects of SF6 ionosphere release are obtained.
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Key words:
- Flow field simulation /
- Sulfur hexafluoride /
- Ionosphere /
- Chemical release
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[1] KELLEY M C. The Earth's ionosphere:plasma physics and electrodynamics[M]. San Diego:Academic Press, 2009 [2] HUANG Wengeng, GU Shifen. Ionospheric disturbances produced by artificially chemical releases[J]. Chin. J. Space Sci., 2005, 25(4):254-258 [3] BERNHARDT P A. Chemistry and dynamics of SF6 injections into the F region[J]. J. Geophys. Res., 1984, 89:3929-3937 [4] BERNHARDT P A. High-altitude gas release:transition from collisionless flow to diffusive flow in a nonuniform atmosphere[J]. J. Geophys. Res., 1979, 84:4341-4354 [5] BERNHARDT P A. Plasm fluid instabilities in ionospheric hole[J]. J. Geophys. Res., 1982, 87:7539-7549 [6] MENDILLO M, SEMETER J, NOTO J. Finite element simulation:a computer modeling technique for studies of chemical modification of the ionosphere[J]. Adv. Space Res., 1993, 13(10):55-64 [7] HU Yaogai, ZHAO Zhengyu, ZHANG Yuannong. Disturbance effects of some representative chemical releases in ionosphere[J]. Acta Phys. Sin., 2010, 59(11):8293-8303(胡耀垓, 赵正予, 张援农. 几种典型化学物质的电离层释放效应研究[J]. 物理学报, 2010, 59(11):8293-8303) [8] (黄勇, 时家明, 袁忠才. 释放化学物质耗空电离层电子密度的研究[J]. 地球物理学报, 2011, 54(1):1-5HUANG Yong, SHI Jiaming, YUAN Zhongcai. Ionosphere electron density depletion caused by chemical release[J]. Chin. J. Geophys., 2011, 54(1):1-5 [9] ZHAO Haisheng, XU Zhengwen, WU Zhensen, et al. A three-dimensional refined modeling for the effects of SF6 release in ionosphere[J]. Acta Phys. Sin., 2016, 65(20):209401(赵海生, 许正文, 吴振森, 等. 电离层中释放六氟化硫效应的三维精细模拟研究[J]. 物理学报, 2016, 65(20):209401) [10] WANG Fujun. Computational Fluid Dynamics Analysis-CFD Software Principles and Applications[M]. Beijing:Tsinghua University Press, 2004(王福军. 计算流体动力学分析——CFD软件原理与应用[M]. 北京:清华大学出版社, 2004) [11] FUNKE M, KLEINRAHM R, WAGNER W. Measurement and correlation of the (p,ρ,T) relation of sulphur hexafluoride (SF6). I. The homogeneous gas and liquid region in the temperature range from 225K to 340K at pressures up to 12MPa[J]. J. Chem. Thermodyn., 2002, 34:717-734 [12] SCALABRIN G, BETTIO L, MARCHI P. A fundamental equation of state for sulfur hexafluoride (SF6) in extended equation of state format[J]. J. Phys. Chem. Ref. Data, 2007, 36(2):617-662 [13] GUDER C, WAGNER W. A reference equation of state for the thermodynamic properties of sulfur hexafluoride (SF6) for temperatures from the melting line to 625K and pressures up to 150MPa[J]. J. Phys. Chem. Ref. Data, 2009, 38(1):33-94 -
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