Development of three-dimensional vortex method for gas-liquid two-phase flow around an obstacle and verification by experiment

绕障碍物气液两相流三维涡流法的建立及实验验证

基本信息

批准号：
14550145
负责人：
UCHIYAMA Tomomi
金额：
$ 1.79万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550145/
关键词：
gas-liquid two-phase flow vortex method bubbly flow flow around obstacle vortical structure void fraction vortex in cell method jet 流れの可視化 Vortex in cell

项目摘要

1.Development of three-dimensional vortex method for free turbulent flowA three-dimensional vortex method for single-phase jet is developed. A compound jet issuing from a round nozzle into the stream co-flowing in the same direction is simulated. The flow in the nozzle is solved by a panel method. The vortex elements are released from the nozzle edge, and the behavior is simulated by the Lagrangian approach. A blob model is employed for the vortex element. The distribution function for the vorticity in each vortex element and the axial length of the computational domain are found to affect the numerical results.2.Development of three-dimensional vortex method for jet entrained with bubbleThe three-dimensional vortex method is applied to simulate the jet loaded with small bubbles. The simulation examined the effect of the disturbance at the nozzle exit.3.Measurement of static pressure on an obstacle installed in vertically upward bubbly flowThe static pressures on an obstacle installed in vertically upward bubbly flow are measured.4.Development of vortex method for bubble-laden free turbulent flowA vortex method for bubbly flow is developed. The method can consider the interaction between the two phases. In the method, the liquid vorticity field is discretized into the vortex elements. The behavior of the vortex element and the motion of the bubble are calculated by the Lagrangian method. The change of the vorticity due to the bubble is estimated by the vortex in cell method. The validity of the method is confirmed by applying the simulation of a plane mixing layer loaded with air bubbles.

1.开发了单相射流的三维流动涡流方法的三维涡流法的开发。模拟了从圆形喷嘴发出的复合喷气机，以同一方向共同流动。喷嘴中的流量通过面板方法求解。涡流元素是从喷嘴边缘释放的，该行为是通过拉格朗日方法模拟的。用于涡旋元素的斑点模型。发现每个涡旋元件中涡度的分布函数和计算结构域的轴向长度都会影响数值结果。2。使用Fupblethe三维涡流方法插入的三维涡流方法的开发用于模拟带有小气泡的喷气机。模拟检查了喷嘴出口处的干扰的影响。3。静态压力对垂直向上的气泡中安装的障碍物的测量，测量了垂直向上向上气泡流的障碍物上的静态压力。4。涡旋方法用于涡流方法的涡流方法，用于空白的自由流动流动流量流动式流动式流量。该方法可以考虑两个阶段之间的相互作用。在该方法中，将液体涡度场离散到涡旋元素中。 Vortex元素的行为和气泡的运动是通过Lagrangian方法计算的。由于气泡而引起的涡度的变化是通过细胞法中涡流估算的。通过应用装有气泡的平面混合层的模拟来确认该方法的有效性。