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Journal of Thermal Science

, Volume 29, Issue 1, pp 43–51 | Cite as

Experimental Investigations of the Flow Field Structure and Interactions between Sectors of a Double-Swirl Low-Emission Combustor

  • Xiongjie Fan
  • Gang Xu
  • Cunxi LiuEmail author
  • Jianchen Wang
  • Yuzhen Lin
  • Chi Zhang
Article
  • 27 Downloads

Abstract

In this paper, the flow field characteristics of a double-swirl low-emission combustor were analyzed by using Particle Imaging Velocimetry (PIV) technology in an optical three-sector combustor test rig. The interactions between sectors and the flow field structure were explained. The results illustrated that there was a big difference between the flow field structures of the middle sector and the side sector under the same pressure drop, which was mainly induced by the interactions between sectors. The interactions made the swirl intensity of the middle sector weaker than that of the side sector, which made the recirculation zone of the middle sector be smaller than that of the side sector. With the increase of swirler pressure drop, the jet velocity at the exit of the swirler, the jet expansion angle, the width of the recirculation zone and the recirculating speed of the central axis became larger, enhancing the interactions between air streams from middle sector and side sector. The flow velocity in the central plane between sectors was small, especially the radial velocity, mainly because of the loss of the swirl intensity by the interactions between flow field of adjacent sectors. The expansion angle determined the position of the vortex in the primary recirculation zone; the axial and radial position of the vortex move downstream and radial outward with the increase of the jet expansion angle. The results of the mechanism of flow field organization in this study can be used to support the design of new low-emission combustor.

Keywords

combustor recirculation zone Particle Imaging Velocimetry (PIV) pressure drop 

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Notes

Acknowledgments

This work was supported by the Project 91641109 and the Project 51406202 of National Natural Science Foundation of China.

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Copyright information

© Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Xiongjie Fan
    • 1
    • 2
  • Gang Xu
    • 1
    • 2
  • Cunxi Liu
    • 1
    • 2
    Email author
  • Jianchen Wang
    • 3
  • Yuzhen Lin
    • 3
  • Chi Zhang
    • 3
  1. 1.Key Laboratory of Light-duty Gas-turbine, Institute of Engineering ThermophysicsChinese Academy of SciencesBeijingChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, Collaborative Innovation Center of Advanced Aero-Engine, School of Energy and Power EngineeringBeihang UniversityBeijingChina

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