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

• 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

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.自由湍流三维涡方法的发展本文发展了单相射流三维涡方法。模拟了复合射流从圆形喷嘴喷入同向同向流动的射流。喷管内的流动采用面元法求解。采用拉格朗日方法模拟了喷管边缘释放的涡元。涡元采用斑点模型。研究发现，各涡元涡量分布函数和计算区域的轴向长度对数值结果有影响。2.含气泡射流三维涡方法的发展应用三维涡方法对含小气泡射流进行了数值模拟。3.垂直上升泡状流中障碍物静压的测量本文测量了垂直上升泡状流中障碍物上的静压。4.含泡自由湍流涡方法的发展了适用于泡状流的涡方法。该方法可以考虑两相之间的相互作用。该方法将液体涡量场离散为涡元。用拉格朗日方法计算了涡元的行为和气泡的运动。用涡格法计算了气泡对涡量的影响。通过对含有气泡的平面混合层的数值模拟，验证了该方法的有效性。

项目成果

Masutani, N., Uchiyama, T., Minemura, K., Tokai, H.: "Stochastic Features of Fluctuating Pressure Waveforms through a Wedge in Air Water Two-Phase Flow"Proc. 5^<th> JSME-KSME Fluids Engineering Conference. (on CD-ROM). (2002)

Masutani, N.、Uchiyama, T.、Minemura, K.、Tokai, H.：“通过空气水两相流中的楔形物的脉动压力波形的随机特征”Proc。

Uchiyama, T., Honda, T.: "Vortex Simulation of Bubble Dispersion in an Excited Round"Proc.German-Japanese Workshop on Multi-Phase Flow. (CD-ROM). (2002)

Uchiyama, T.、Honda, T.：“受激圆中气泡分散的涡流模拟”Proc.德国-日本多相流研讨会。

内山知実, 本田剛士: "励起された円形気泡噴流における気泡分散の三次元渦法解析"日本混相流学会年会講演会講演論文集. 193-194 (2003)

Tomomi Uchiyama、Takeshi Honda：“激发圆形气泡射流中气泡分散的三维涡流法分析”日本多相流学会年会记录 193-194 (2003)。

Uchiyama, T.: "Numerical Prediction of the Round Jet in a Co-Flowing Stream by Three -Dimensional Vortex Method"International Journal of Turbo & Jet Engines. 20. 235-244 (2003)

Uchiyama, T.：“通过三维涡旋法对同流流中的圆形射流进行数值预测”国际涡轮杂志

Uchiyama, T.: "Numerical Simulation of a Compound Round Jet by Three-Dimensional Vortex Method"Proc. 4th ASME/JSME Joint Fluids Engineering Conference. (CD-ROM). (2003)

Uchiyama, T.：“三维涡流法复合圆形射流的数值模拟”Proc。