| ACRT 过程 Ekman 流的影响因素分析 |
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| 引用本文： | 刘俊诚,郭喜平,刘晓华,介万奇,周尧和.ACRT 过程 Ekman 流的影响因素分析[J].航空学报,1997,18(6):752-754. |
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| 作者姓名： | 刘俊诚 郭喜平 刘晓华 介万奇 周尧和 |
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| 作者单位： | 西北工业大学凝固技术国家重点实验室 |
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| 基金项目： | 国家自然科学基金,航空科学基金 |
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| 摘 要： | 将坩埚加速旋转技术（ACRT）过程中Ekman流的影响因素归纳为无量纲数Re,ωmaxt1和ωmaxt2,利用计算方法分析了各无量纲数的影响。结果表明，当坩埚转速按梯形波变化，坩埚内流体高度大于3倍坩埚直径时，Ekman流的强度随Re,ωmaxt1的增加呈峰值性变化，随ωmaxt2的增加而线性增加。
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| 关 键 词： | ACRT 数值模拟 量纲分析 |
ANALYSES OF FACTORS AFFECTING EKMAN FLOW DURING ACRT PROCESS |
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| Liu Juncheng,Guo Xiping,Liu Xiaohua,Jie Wanqi,Zhou Yaohe.ANALYSES OF FACTORS AFFECTING EKMAN FLOW DURING ACRT PROCESS[J].Acta Aeronautica et Astronautica Sinica,1997,18(6):752-754. |
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| Authors: | Liu Juncheng Guo Xiping Liu Xiaohua Jie Wanqi Zhou Yaohe |
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| Institution: | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi′an,710072 |
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| Abstract: | Factors affecting Ekman flow are analyzed, and attributed to three dimensionless numbers ,Re, ω max t 1 and ω max t 2. Effects of these numbers on Ekman flow are numerically studied .The results show that with increases of Re and ω max t 1, Ekman flow strengthens at first, and then weakens. The strength of Ekman flow increases linearly as ω max t 2. increases . For effective Ekman flow, 500.0≥Re≤800.0, 12.0≥ω max t 1≤40.0, ω max t 2 ≈50.0. |
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| Keywords: | ACRT numerical analogies dimensional analysis |
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