摘要
在对水工质激光推进内流场特征分析的基础上,对描述内流场演化过程的数学模型进行探讨,研究了水滴蒸发模型、水滴变形和破碎模型在水工质激光推进内流场演化过程中的作用。研究结果表明,流场演化过程中,蒸发引起的水滴体积变化率不会超过0.0216%,因而蒸发模型对于计算结果影响不大,在计算过程中可以忽略;水滴在激波流场的作用下破碎成较小的水滴,形成二次雾化,破碎后的水滴体积最小只有原体积的1.5%,对于激光能量的沉积有较大影响,所以在计算中必须考虑水滴变形和破碎模型。
To describe inner flow-field of laser propulsion with water propellant, mathematical models based on analysis of its characteristics was established. Effects of evaporation model and deformation and breaking model on evolution of inner flow-field were investigated. Results show that capacity change rate of droplet is no more than 0. 0216% caused by evaporation and volume of broken water drop produced by shock wave is about 1.5% of the original one. So evaporation can be ignored in the process of flow-field evolution, and deformation and breaking must be considered for its second atomization and its effect on deposition of laser energy.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2007年第5期501-504,共4页
Journal of Propulsion Technology
基金
国家"九七三"项目(61328)
关键词
激光推进
水工质
流场演化
蒸发模型
变形和破碎模型
Laser propulsion
Water propellant
Flow-field evolution
Evaporation model
Deformation and breaking model
