固体火箭技术2011，Vol.34Issue(6)：739-744,6.
凝胶推进剂弯管流动特性的数值实验研究
Numerical experiment research on flow property of gelled propellants in pipe-bending pipe
摘要
Abstract
To evaluate the influence of the various bend diameter ratio Rc/R and velocity on the flow property of gelled propel-lants in pipe-bending pipe,the 3D governing equations of the steady,incompressible,isothermal,laminar flow of a power-law,shear-thinning gel propellants in pipe-bending pipe were formulated, discretized and solved. A SIMPLEC numerical algorithm was applied for the solution of the flow field. Numerical investigation on a series of sharp 90°pipe-bending pipelines with nine kinds of bend diameter ratio and the inner diameters of 8 mm were conducted under the condition of seven Reynolds numbers. The pressure and velocity distributions were obtained. The empirical equation of local resistance coefficient for numerical experiments was conducted, providing the interrelations between the best bend diameter ratio and flow velocity in engineering design. The results indicate that the pressure and velocity distributions were non-linear ,which became tremendous with increase of Reynolds numbers. The results suggest that the dot of maximum velocity occur at the wall outside of a bending pipe, which is nearer to the wall outside of a bending pipe along the flowing direction and increasing velocity. The phenomena of particle sedimentation should be taken into account to investigate the flowing behavior of gelled propellants in pipe-bending pipes under the condition of lower Reynolds numbers.关键词
凝胶推进剂/弯管/流动特性/数值实验Key words
gelled propellant/curved pipe/flow property/numerical experiment分类
航空航天引用本文复制引用
夏学礼,强洪夫,周志清..凝胶推进剂弯管流动特性的数值实验研究[J].固体火箭技术,2011,34(6):739-744,6.基金项目
国家重大基础研究发展计划(613102). （613102）
