Volume 40 Issue 10
Oct.  2025
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XU Xinting, ZENG Wen, LIU Kai, et al. Experimental testing and numerical calculation of flow field characteristics in a double stage axial swirl combustor[J]. Journal of Aerospace Power, 2025, 40(10):20230776 doi: 10.13224/j.cnki.jasp.20230776
Citation: XU Xinting, ZENG Wen, LIU Kai, et al. Experimental testing and numerical calculation of flow field characteristics in a double stage axial swirl combustor[J]. Journal of Aerospace Power, 2025, 40(10):20230776 doi: 10.13224/j.cnki.jasp.20230776

Experimental testing and numerical calculation of flow field characteristics in a double stage axial swirl combustor

doi: 10.13224/j.cnki.jasp.20230776
  • Received Date: 2023-12-10
    Available Online: 2025-07-29
  • The flow field structure and characteristics in a double stage axial swirl combustion chamber of an aero-engine were experimentally tested and numerically calculated, and the flow field structure, streamline and velocity distribution characteristics on the different longitudinal and cross sections in the combustion chamber under different conditions were obtained. The results showed that there were two symmetric distribution angle recirculation zones and one central recirculation zone on the longitudinal section in the combustion chamber. With the increase of distance along the positive X-axis or the decrease of intake flow rate, the air velocity in the recirculation zone decreased. With the increase of distance along the positive Y-axis, the airflow rotation direction tended to be the same and the air flow velocity decreased on the cross section in the combustion chamber. Meanwhile, with the increase of intake flow rate, the flow field shape and flow velocity distribution characteristics of the air on the same cross section were basically the same, but the air flow velocity increased gradually. Under different conditions, on the X=0 mm longitudinal section, the axial velocity distribution at each axial distance was basically consistent. At Z=0 mm, the axial velocity reached the maximum negative velocity, and gradually decreased with the increase of radial distance. With the axial distance increasing, the recirculation zone area was gradually reduced, the axial velocity increased first, then decreased, and reached its maximum at Y=50 mm. Meanwhile, with the increase of intake flow rate, the axial velocity gradually increased at different axial distances. The calculated distribution characteristics of axial and radial velocities on the X=0 mm longitudinal section and at an axial distance of Y=30 mm were in good agreement with the corresponding experimental data under different conditions, and the relative error was less than 10%.

     

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