| 简化微小液滴在超声速气流横向喷射中的运动探索 |
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| 引用本文： | 尚庆,沈清,庄逢甘.简化微小液滴在超声速气流横向喷射中的运动探索[J].空气动力学学报,2010,28(2). |
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| 作者姓名： | 尚庆 沈清 庄逢甘 |
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| 作者单位： | 1. 中国航天空气动力技术研究院,北京,100074
2. 中国航天科技集团公司,北京,100037 |
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| 基金项目： | 中国博士后科学基金项目(20080430461)资助 |
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| 摘 要： | 从研究超声速气流中简化液滴(刚性小球)的气动力着手,比较分析使用CFD方法与使用两相流理论中已有的颗粒阻力系数模型得到的简化液滴气动力结果,得出Charles B.Henderson给出的阻力系数经验关系式适用于计算简化液滴在超声速气流中的运动。进一步,对不同直径简化液滴的运动开展工程方法的计算。在来流Ma=2.7的二维平板超声速流场中选取一个截面,作为气相流场,结果显示:(1)简化液滴与主气流存在相对超声速运动,当简化液滴直径dk≤0.12mm时,纵向相对超声速运动区域约为0.15m~0.4m,当dk0.12mm时,作用区域明显增大;(2)以10m/s喷射出的简化液滴,其横向穿透深度与纵向运动距离比约为0.004m/1m~0.021m/1m;(3)以100m/s的速度喷射出的30~120μm直径简化液滴,其横向穿透深度与纵向运动距离比约为0.02m/1m~0.055m/1m,实际过程中,小尺寸简化液滴的汽化很快,其穿透深度很小。
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| 关 键 词： | 简化液滴 气动力 两相流 阻力系数 |
The study for the motion of simplified little droplet and transversely injection in supersonic flow |
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| SHANG Qing,SHEN Qing,ZHUANG Feng-gan.The study for the motion of simplified little droplet and transversely injection in supersonic flow[J].Acta Aerodynamica Sinica,2010,28(2). |
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| Authors: | SHANG Qing SHEN Qing ZHUANG Feng-gan |
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| Institution: | 1.China Academy of Aerospace Aerodynamics/a>;Beijing 100074/a>;China/a>;2.China Aerospace Science and Technology Corporation/a>;Beijing 100037/a>;China |
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| Abstract: | Beginning from the study for the aerodynamic force on simplified droplet(little rigid sphere) in supersonic flow,the results of aerodynamic force,using by CFD method and by the drag coefficient models in the two phase flow theory,are compared and analyzed.So it is concluded that the drag coefficient formula given by Charles B.Henderson is suitable to simulate the simplified droplet movement in supersonic airflow.Further more,the calculation of different diameter simplified droplet movement is carried out by... |
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| Keywords: | simplified droplet aerodynamic force two phase flow drag coefficient |
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