| 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。 |
| 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 |
| DOI： |
| 分类号:V439 |
| 基金项目:国家“九七三”项目(61328) |
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| Analysis of numerical models to describe inner flow-field evolution of laser propulsion with water propellant |
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CUI Cun-yan,HONG Yan-ji,LI Qian,LI Qiang,HE Guo-qiang
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1.Coll.of Astronautics,Northwestern Polytechnical Univ.,Xi′an 710072,China;2.Inst.of Equipment Command and Technology,Beijing 101416,China
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| Abstract: |
| 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. |
| Key words: Laser propulsion Water propellant Flowfield evolution Evaporation model Deformation and breaking model |
