变截面流化床理论模型及数值模拟
Theoretical model and numerical simulation of variable section fluidized bed
查看参考文献20篇
|
文摘
|
基于双流体模型,在一定假设的条件下推导得到了用于描述变截面床流化过程的局部平衡模型。对于局部平衡模型,空间导数项的离散采用五阶精度的WENO有限差分格式,时间导数项的离散采用TVD Runge-Kutta型的离散格式,对流量突变后的瞬态过程进行了模拟,得到固相体积分数在整个变化过程中沿床高的分布以及床高变化规律和床层表面颗粒速度变化曲线。对于流量突增过程,在床内不同位置形成了一系列的连续波,当所有的连续波到达床面整个变化过程结束。而对于流量突然减小过程,将会有固相体积分数间断在分布板处形成,当所有间断到达床面时,塌落过程结束。 |
|
其他语种文摘
|
Based on the Two-Fluid Model,under some hypotheses,the Local Equilibrium Model（LEM） was developed.Using the model,the bed height and concentration distributing in liquid-solid variety section bed were studied by numerical simulation method.The fifth-order WENO scheme was used for spatial derivative and third-order TVD Runge-Kutta method for time derivative.The laws of the bed height change,the particle velocity,the particle volume fraction distributing were gotten.The simulation results show that during the process of expansion,there always exists a progressively broadening and upward-propagating continuous transition zone,but during the collapse process a solid-phase volume fraction discontinuity propagating upward from the distributor appears. |
|
来源
|
化学工程
,2008,36(3):31-34,42 【核心库】
|
|
关键词
|
流态化
;
变截面流化床
;
固相体积分数分布
;
数值模拟
|
|
地址
|
中国科学院力学研究所, 北京, 100080
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1005-9954 |
|
学科
|
化学工业 |
|
基金
|
国家自然科学基金
|
|
文献收藏号
|
CSCD:3230660
|
参考文献 共
20
共1页
|
|
1.
Bi H T. Minimum spouting velocity of conical spouted beds.
Canadian Journal of Chemical Engineering,1997,75(2):460-465
|
被引
4
次
|
|
|
|
|
2.
Crank J.
Free and Moving Boundary Problems,1984:187-216
|
被引
2
次
|
|
|
|
|
3.
Deiva Venkatesh R. Fluidization of cryogels in a conical column.
Powder Technology,1996,89(3):179-186
|
被引
2
次
|
|
|
|
|
4.
Glasscr B J. Fully developed traveling wave solutions and bubble formation in fluidized beds.
Journal of Fluid Mechanics,1997,334(2):157-188
|
被引
1
次
|
|
|
|
|
5.
Jiang G s. Efficient implementation of weighted ENO schemes.
Journal of Computational Physies,1996,126(1):202-228
|
被引
382
次
|
|
|
|
|
6.
Jin C D. Numerical simulation of pulsed liquid fluidization and its experimental validation.
Powder Technology,2001,119:153-162
|
被引
1
次
|
|
|
|
|
7.
Kawaguehi T. Numerical simulation of two-dimensional fluidized beds using discrete element method(comparison between the two-and three models.
Powder Technology,1998,96(2):129-138
|
被引
1
次
|
|
|
|
|
8.
Liu D Y. Modeling two-phase flow in pulsed fluidized bed.
China Particuology,2003,1(3):95-104
|
被引
2
次
|
|
|
|
|
9.
Needham D J. The propagation of voidage disturbance in a uniformly fluidized bed.
Journal of Fluid Mechanics,1983,131(2):427-430
|
被引
7
次
|
|
|
|
|
10.
Olazar M. Stable operation conditions for gas solids contact regimes in conical spouted beds.
Industrial&Engineering Chemistry Research,1992,31(7):1784-1792
|
被引
14
次
|
|
|
|
|
11.
Olazar M. Pressure drop in conical spouted beds.
Chemical Engineering Journal,1993,51(1):53-58
|
被引
7
次
|
|
|
|
|
12.
Olazar M. Hydrodynamics of sawdust and mixtures of wood residues in conical spouted beds.
Indusmal&Engineering Chemistry Research,1994,33(4):993-1000
|
被引
3
次
|
|
|
|
|
13.
Peng Y. Hydrodynamic characteristics of fluidization in liquid-solids tapered beds.
Chemical Engineering Science,1997,52(14):2277-2290
|
被引
13
次
|
|
|
|
|
14.
Renzo Di Felice. Hydrodynamics of liquid fluidization.
Chemical Engineering Science,1995,50(8):1213-1218
|
被引
20
次
|
|
|
|
|
15.
Richardson J F. Sedimentation and fluidization:part I.
Trans Instn Chem Engrs,1954,32(1):35-53
|
被引
1
次
|
|
|
|
|
16.
Shu C W. Efficient implementation of essentially non-oscillatory shock capturing schemes.
Journal of Computational Physics,1988,77(2):439-471
|
被引
221
次
|
|
|
|
|
17.
Tsinontides S C. The mechanics of gas fluidized beds with an interval of stable fluidization.
Journal of Fluid Mechanics,1993,255(1):237-274
|
被引
2
次
|
|
|
|
|
18.
晋国栋.
液固脉冲流化过程的数值模拟和实验验证,2002:31-77
|
被引
1
次
|
|
|
|
|
19.
刘大有.
二相流体动力学,1993:106-156
|
被引
2
次
|
|
|
|
|
20.
Kwauk M.
Fluidization,1992:91-100
|
被引
1
次
|
|
|
|
|
了解气象卫星更多信息，请访问