Pseudospectral Analysis of the Interfacial Stability of Free Jets With Different Velocity Profiles
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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
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.-
Key words:
- free jet /
- Chebyshev pseudospectral method /
- interfacial stability
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