摘要
利用双流体模型对固体火箭发动机喷管内气固两相流进行计算,研究了两相流中颗粒相与气相的相互作用,分析了颗粒粒径及颗粒质量分数对两相流中气相在喷管中膨胀的影响。结果表明,颗粒粒径造成两相流损失的大小是颗粒比表面积、气相湍流动能及颗粒在喷管内的滞留时间等因素共同作用的结果,两相流损失随着颗粒粒径的增大先增大、后减小,同时随着颗粒质量分数增大而增大;JPL喷管中粒径为2μm的颗粒造成的两相流损失最大,此粒径下,当颗粒质量分数从10%增大到40%时,两相流损失从10%增大到26%。
A two-fluid model was applied to simulate two-phase flow in two SRM nozzles. The interactional mechanism of gas phase and particle phase was studied. The effect on gas phase expansion in nozzle was studied under different particle sizes and dif-ferent particle mass percentages. The results indicate that the loss of two phase flow caused by particle sizes is the combined product of the specific surface area of particles, turbulent kinetic energy of gas phase and particle residence time in the nozzle. The loss of two phase flow increases first and then decreases with the increase of particle sizes, while increases all along with the increase of particle mass percentages;In JPL nozzle, 2μm-diameter particles caused the most loss of two phases, increasing from 10% to 26%when the particle mass percentage ranges from 10% to 40%.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2014年第6期804-808,共5页
Journal of Solid Rocket Technology
基金
国家自然科学基金(11372079)
关键词
喷管
两相流
双流体模型
颗粒
气相
nozzle
two-phase flow
two-fluid model
particles
gas phase
