固体火箭技术2026，Vol.49Issue(2)：290-303,14.DOI:10.7673/j.issn.1006-2793.2026.02.014
固体推进剂加工工艺的光滑粒子动力学数值仿真
Numerical simulation of solid propellant processing technology based on smoothed particle hydrodynamics
摘要
Abstract
During solid propellant production,multi-component particles and binders need to be stirred in a mixing kettle to form a slurry and then pressure-poured into the motor chamber.The complex interfacial dynamics of multiphase components during mixing,along with the high yield stress and the discontinuous extrusion of slurry during casting are difficult to be effectively simulated by means of traditional grid-based methods.Based on the smoothed particle hydro-dynamics(SPH)method,combined with the Herschel-Bulkley-Papanastasiou constitutive model and the multi-component description framework,a numerical model suitable for the mixing and casting processes of solid propellant slurry was established,and the mixing experiment was carried out.The results show that this method has high accuracy while simulating Newtonian and non-Newtonian fluids.The simulation deviations of Np-Re power characteristic curves of Newtonian and non-Newtonian fluids are 7.6%and 1.7%,respectively.SPH simulations of planetary mixing reveal chaotic effect from stirring and kneading of solid and hollow double blades,as well as the synergistic effect of high-vorticity hot spots.After mixing,the slurry reaches a uniform state with a density difference within≤80 kg/m3,and the uniformity square deviation tends to be stabilize after four evolutionary stages.The shear-thinning of the mixture promotes the formation of spiral band of high-vorticity hot spots near hollow blades.For vacuum casting,the SPH simulation completely captures the extrusion-fracture-retraction,leveling accumulation and wetting penetration behavior of the slurry,and verifies dislocation arrangement effectiveness of the core mold and the pouring hole,indicating that the liquid level is highly consistent in the area away from the injection hole,and the slurry has good leveling.关键词
固体推进剂/SPH方法/非牛顿流体/行星式混合/真空浇注Key words
solid propellant/smoothed particle hydrodynamics/Non-Newtonian fluid/planetary mixting/vacuum casting分类
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王智泓,王春光,王悦聪,刘一新,李易寒..固体推进剂加工工艺的光滑粒子动力学数值仿真[J].固体火箭技术,2026,49(2):290-303,14.基金项目
全国重点实验室开放基金(NKLACP220241B13). （NKLACP220241B13）
