Numerical and experimental investigations on the breakup of particle laden liquid jets in the centrifugal field
Numerical and experimental investigations on the breakup of particle laden liquid jets in the centrifugal field
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离心场中颗粒加载液体射流破碎的数值和实验研究
DOI：
10.1016/j.ces.2012.08.011
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发表时间：
2012
影响因子：
4.7
通讯作者：
Piesche M.
中科院分区：
文献类型：
--
作者：
Gramlich S;Piesche M.
用摄动理论和实验方法研究了旋转杯内圆柱形喷嘴喷出的粘性液体射流在离心力的作用下被拉长的破碎过程。在微扰理论中，射流的流动被分解为稳态运动和微小扰动的瞬变运动，通过射流半径的振荡可见，从而导致破碎。通过力和质量的平衡，得到了提供无扰动射流的轮廓和轨迹的稳态运动方程。利用计算流体力学推导出的阻力系数考虑了周围气体大气的影响。用线性稳定性分析的方法研究了扰动的暂态运动。颗粒液体射流的运动方程是基于欧拉公式中的质量平衡和冲量平衡建立的。因此，每个阶段都被视为一个连续体。将周围气体的运动视为势流，考虑周围气体的压力振荡。同时进行了时间稳定性分析和空间稳定性分析。对射流的稳定性也进行了实验研究。使用阴影成像分析了曲率、破裂长度和所产生的液滴。并将实验结果与数值模型进行了比较。
The breakup of a particle laden viscous liquid jet, emitted from a cylindrical nozzle in a rotating cup and thus elongated by centrifugal force is studied by means of perturbation theory and experiments. In perturbation theory the flow of the jet is decomposed into a steady state motion and the transient motion of the small perturbations visible by the oscillation of the jet radius, which leads to breakup. The steady state equations of motion providing the contour as well as the trajectory of the unperturbed jet are derived by balances of forces and mass. The influence of the surrounding gas atmosphere is considered by a drag coefficient which is derived by means of computational fluid dynamics. The transient motion of the perturbations is studied by means of linear stability analysis. The equations of motion for the particle laden liquid jet are based on balances of mass and impulse in the Eulerian formulation. Hence each phase is treated as a continuum. The pressure oscillation in the surrounding gas is considered by treating the gas motion as potential flow. Both, temporal and spatial stability analysis is implied. Jet stability is also investigated experimentally. The curvature, breakup length and the resulting drops are analyzed using shadow imaging. The experimental findings are compared to the numerical model.
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螺旋液体射流产生的破碎动力学和液滴尺寸分布
DOI：
--
发表时间：
2004
期刊：
影响因子：
--
作者：
David Wong;M. Simmons;S. Decent;E. Părău;A. King
通讯作者：
A. King
液体射流的破裂：第三扰动 Cosserat 解
DOI：
--
发表时间：
1979
期刊：
影响因子：
--
作者：
D. Bogy
通讯作者：
D. Bogy
气体工业中的模型和实验研究
影响因子：
1.9
作者：
S. Gramlich;Axel Mescher;M. Piesche;P. Walzel
通讯作者：
P. Walzel
重力作用下液体射流的稳定性行为
影响因子：
2.1
作者：
S. Nonnenmacher;M. Piesche
通讯作者：
M. Piesche
流体动力不稳定的时间和流动
影响因子：
1.9
作者：
M. Piesche;Michael Breitling;S. Schütz
通讯作者：
S. Schütz