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蜂窝材料及孔格结构技术的发展 被引量:32
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作者 王玉瑛 吴荣煌 《航空材料学报》 EI CAS CSCD 2000年第3期172-177,共6页
介绍了一种新型的芳纶 /酚醛型高模量、高强度的Korex蜂窝芯材。并对不同孔格 密度的Korex蜂窝芯材进行了力学性能和典型使用性能的对比 ,给出了几种新型的蜂窝结构。新型蜂窝材料和新型蜂窝孔格结构的研究 ,将有效地提高蜂窝结构的力... 介绍了一种新型的芳纶 /酚醛型高模量、高强度的Korex蜂窝芯材。并对不同孔格 密度的Korex蜂窝芯材进行了力学性能和典型使用性能的对比 ,给出了几种新型的蜂窝结构。新型蜂窝材料和新型蜂窝孔格结构的研究 ,将有效地提高蜂窝结构的力学性能 ,显著地降低结构重量 ,提高使用可靠性 。 展开更多
关键词 蜂窝材料 孔格结构 KOREX 芳纶/酚醛型
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Lattice Boltzmann simulation of fluid flow through coal reservoir's fractal pore structure 被引量:15
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作者 JIN Yi SONG HuiBo +2 位作者 HU Bin ZHU YiBo ZHENG JunLing 《Science China Earth Sciences》 SCIE EI CAS 2013年第9期1519-1530,共12页
The influences of fractal pore structure in coal reservoir on coalbed methane(CBM) migration were analyzed in detail by coupling theoretical models and numerical methods.Different types of fractals were generated base... The influences of fractal pore structure in coal reservoir on coalbed methane(CBM) migration were analyzed in detail by coupling theoretical models and numerical methods.Different types of fractals were generated based on the construction thought of the standard Menger Sponge to model the 3D nonlinear coal pore structures.Then a correlation model between the permeability of fractal porous medium and its pore-size-distribution characteristics was derived using the parallel and serial modes and verified by Lattice Boltzmann Method(LBM).Based on the coupled method,porosity(ф),fractal dimension of pore structure(Db),pore size range(rmin,rmax) and other parameters were systematically analyzed for their influences on the permeability(ф) of fractal porous medium.The results indicate that:① the channels connected by pores with the maximum size(rmax) dominate the permeability,approximating in the quadratic law;② the greater the ratio of r max and r min is,the higher is;③ the relationship between D b and follows a negative power law model,and breaks into two segments at the position where Db ≌2.5.Based on the results above,a predicting model of fractal porous medium permeability was proposed,formulated as k=cfrnmax,where C and n(approximately equal to 2) are constants and f is an expression only containing parameters of fractal pore structure.In addition,the equivalence of the new proposed model for porous medium and the Kozeny-Carman model k=Crn was verified at Db =2.0. 展开更多
关键词 Lattice Boltzmann simulation of fluid flow through coal reservoir's fractal pore structure
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