含能材料2024，Vol.32Issue(11)：1162-1173,12.DOI:10.11943/CJEM2024043
固体推进剂药浆立式混合过程SPH方法研究
SPH Method for Vertical Mixing Process of the Solid Propellant Slurry
摘要
Abstract
The planetary motion of impeller in the vertical mixer can effectively promote the dispersed circulation and homoge-neous distribution of different material components,which has been employed in the preparation procedure of solid propellant slurry.However,the mixer involves complex interfaces and motions that it is difficult to study the mixing mechanism and rheo-logical property of slurries by traditional methods.Based on the smoothed particle hydrodynamics(SPH),the continuum was discretized into the conserved particles with physical quantities for simulating the interaction between the propellant slurry and blades under laminar flow.A meshless method for the mixing process of propellant slurries in non-Newtonian fluid state was de-veloped by combining the Herschel-Bulkley(HB)constitutive model.The numerical simulations were compared with the experi-ments to verify the accuracy of the proposed model.The correlations of the blade motion parameters and power consumption were explored.The effects of geometric configurations and rotation modes on the mixing uniformity of slurries and the torque loads of impellers were analyzed.Research findings indicate that the simulation and literature experiment results have a good agreement that the average relative error between them is around 4.98%in the non-Newtonian fluid with shear rate index n=0.47.The mixing uniformity index of planetary impellers increased by 8.9%and 7.3%respectively than those of central and eccentric impellers after stirring for 2.65 s.The maximum amplification in torque can reach 38.4%within the revolution radius range of 0.11Dw-0.23Dw at Reynolds number Re=1.关键词
固体推进剂药浆/非牛顿流体/行星叶轮/光滑粒子法(SPH)Key words
solid propellant slurry/non-Newtonian fluid/planetary impeller/smoothed particle hydrodynamics(SPH)分类
军事科技引用本文复制引用
洪寅,刘看,武毅,吴艳青,杨秀峰..固体推进剂药浆立式混合过程SPH方法研究[J].含能材料,2024,32(11):1162-1173,12.基金项目
国家自然科学基金(12172049,U2341288) National Natural Science Foundation of China(Nos.12172049,U2341288) （12172049,U2341288）
