Numerical analysis of multi-parallelized swirling flow inside a circular pipe

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• 作者：Akimasa Takayama (1)
  Koki Kitagawa (1)
  Toru Shimada (1)
  
  1. Institute of Space and Astronautical Science ; Japan Aerospace Exploration Agency ; 3-1-1 Yoshinodai ; Chuo ; Sagamihara ; Kanagawa ; Japan
  
• 关键词：Discrete vortex method ; Hybrid rocket ; Mixing ; Numerical simulation ; Swirl flow
• 刊名：Journal of Mechanical Science and Technology
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：29
• 期：3
• 页码：951-962
• 全文大小：2,890 KB
• 参考文献：1. Gupta, A. K., Lilley, D. G., Syred, N. (1984) Swirl flows. ABACUS Press, Cambridge
  2. Vineet, A., Manish, D., Charles, L. M. (1997) The effect of swirl on mixing characteristics of turbulent shear layers. 28 th Fluid Dynamics Conference, USA. pp. 1-12
  3. Bach, T. V., Couldin, F. C. (1982) Flow measurement in a model swirl combustor. AIAA J. 20: pp. 642-651 CrossRef
  4. Ahmed, S. A., Nejad, A. S. (1992) Swirl effects on confined flows in axisymmetric geometries. J., of Propulsion and Power 8: pp. 339-345 CrossRef
  5. Lilley, D. G. (1985) Swirling flows in typical combustor geometries. 23 rd Aerospace Science Meeting, Nevada.
  6. Tacina, R., Wey, C., Laing, P., Mansour, A. (2002) A low nox lean direct injection, mulitpoint integrated module combustor concept for advanced aircraft gas turbines. NASA Glenn Research Center Technical Report.
  7. Cai, J., Jeng, S. M. (2002) Multi-swirler aerodynamics: comparison of different configurations. Proc. of ASME Turbo Expo 2002. pp. 739-748 CrossRef
  8. Humble, R. W., Henry, G. N., Larson, W. J. (1995) Space propulsion analysis and design. McGraw-Hill, New York
  9. Saito, D., Yuasa, S., Hirata, K., Sakurai, T., Shiraishi, N. (2012) Combustion characteristics of paraffin-fueled swirling oxidizer-flow-type hybrid rocket engines. 48 th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Atlanta.
  10. Chen, Y. S., Lian, Y. Y., Yang, L., Wu, B. (2012) Combustion modeling and analysis of hybrid rocket motor internal ballistics. 48 th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Atlanta.
  11. Ishiguro, T., Shinohara, K., Sakio, K., Nakagawa, I. (2011) A study on combustion efficiency of paraffin-based hybrid rockets. 47 th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, San Diego.
  12. Takayama, A. (2013) Flow dynamics of confined multiple swirling jets under non-reacting conditions. 29 th International Symposium on Space Technology and Science, Nagoya.
  13. Rosenhead, L. (1931) The formation of vortices from a surface of discontinuity. Proceedings of the Royal Society of London, Series A, Containing Papers of a Mathematical and Physical Character 134: pp. 170-192 CrossRef
  14. Ojima, A., Kamemoto, K. (2000) Numerical simulation of unsteady flow around three dimensional bluff bodies by an advanced vortex method. JSME International J. Series B, Fluids and Thermal Engineering 43: pp. 127-135 CrossRef
  15. Sauter, S. A., Schwab, C. (2011) Boundary element methods. Springer, Berlin CrossRef
  16. Winkelmans, G., Leonard, A. (1988) Improved vortex methods for three-dimensional flows. Proceedings of the Workshop on Mathematical Aspects of Vortex Dynamics, Leesburg. pp. 25-35
  17. Fukuda, K., Kamemoto, K. (2004) A Lagrangian redistribution model toward the construction of a turbulence model for vortex methods. JSME 70: pp. 2311-2318 CrossRef
  18. Fukuda, K. (2005) Development of a redistribution model for vortex methods and its application to turbulent flow analysis. Ph.D. thesis, Yokohama National University
  19. Alekseenko, S. V., Kuibin, P. A., Okulov, V. L., Shtork, S. I. (1999) Helical vortices in swirl flow. J. of Fluid Mechanics 382: pp. 195-243 CrossRef
  20. Wang, P., Bai, X. S., Wessman, M., Klingmann, J. (2004) Large eddy simulation and experimental studies of a confined turbulent swirling flow. Physics of Fluids 16: pp. 3306-3324 CrossRef
  
• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering
  Structural Mechanics
  Control Engineering
  Industrial and Production Engineering
  
• 出版者：The Korean Society of Mechanical Engineers
• ISSN：1976-3824

文摘

The flow field of multi-parallelized swirling flow inside a circular pipe was investigated numerically. Two types of swirling flow configuration are considered. One type is the co-rotating type. Four co-rotating swirls are arranged at the vertex position of square in this type. The other type is the counter-rotating type which consists of two pairs of swirls having opposite swirl rotations. Each pair is arranged diagonally at the vertex position of a square. By coupling the discrete vortex method and boundary element method, unsteady flow simulation is performed. Swirl modeling with vortex elements is used in this simulation and its validity is confirmed. From the simulation results, in the co-rotating type, the four swirls interact and their shape is deformed. Each vortex motion vanishes rapidly in the downstream region. Finally, they are turned into a single swirling flow. In counter-rotating type, each vortex motion is maintained a little bit longer than co-rotating type, and their shape is not so deformed. However, the flow patterns are changed completely in the downstream region. The swirling velocity of each swirl mostly vanishes. Finally, they are turned into an axial flow. For the investigation of the mixing promoting effect due to parallelizing swirls, particle tracking simulations are performed in the co-rotating type and the counter-rotating type. As a comparison, the simulation for single swirl flow is also performed. In these simulations, the particles are introduced in the vicinity of pipe inner wall. In addition, the assumption that particles follow the flow motion absolutely is used. From the results, the motion of particles in these three cases is completely different. For the co-rotating and counter-rotating type, the particle entrainment into the main axial flow is clearly observed. This indicates the mixing is improved compared to single swirl flow. The difference of particle entrainment motion between co-rotating and counter-rotating type is slight.