| 自由射流不同速度剖面下界面稳定性的伪谱分析 |
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| 引用本文： | 苏海容,胡国辉,周哲玮. 自由射流不同速度剖面下界面稳定性的伪谱分析[J]. 应用数学和力学, 2004, 25(12): 1211-1219 |
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| 作者姓名： | 苏海容 胡国辉 周哲玮 |
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| 作者单位： | 上海大学 上海市应用数学和力学研究所,上海 200072 |
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| 基金项目： | 国家自然科学(钢铁联合研究)基金资助项目(50371049)，上海市博士点基金资助项目，上海市重点学科基金资助项目 |
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| 摘 要： | 建立了外围为气体，内部为液体射流的双流体模型，并用Chebyshev配点法研究了不同速度剖面自由射流的界面稳定性问题．利用非线性的坐标变换，将物理空间变换到计算空间，得到关于时间频率的广义特征值问题．通过对计算结果的分析与讨论，得出射流稳定性的基本特征及其随各种参数的变化趋势．
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| 关 键 词： | 自由射流 Chebyshev配点法 界面稳定性 |
| 文章编号： | 1000-0887(2004)12-1211-09 |
| 收稿时间： | 2003-06-20 |
| 修稿时间： | 2003-06-20 |
Pseudospectral Analysis of the Interfacial Stability of Free Jets With Different Velocity Profiles |
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| SU Hai-rong,HU Guo-hui,ZHOU Zhe-wei. Pseudospectral Analysis of the Interfacial Stability of Free Jets With Different Velocity Profiles[J]. Applied Mathematics and Mechanics, 2004, 25(12): 1211-1219 |
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| Authors: | SU Hai-rong HU Guo-hui ZHOU Zhe-wei |
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| Affiliation: | Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, P. R. China |
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| Abstract: | A double fluid model for a liquid jet surrounded by a coaxial gas stream was constructed. The interfacial stability of the model was studied by Chebyshev pseudospectral method for different basic velocity profiles. The physical variables were mapped into computational space using a nonlinear coordinates transformation. The general eigenvalues of the dispersion relation obtained are solved by QZ method, and the basic characteristics and their dependence on the flow parameters are analyzed. |
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| Keywords: | free jet Chebyshev pseudospectral method interfacial stability |
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