Experimental Study of Fuel-Air Mixing and Dilution Jets on Outlet Temperature Distribution in a Small Gas Turbine Combustor

  • CAI Wenzhe ,
  • WU Jing ,
  • HU Yingqi ,
  • YANG Zhiqiang ,
  • XUE Xin ,
  • LIN Yuzhen
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  • 1. National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, Research Institute of Aero-Engine, Beihang University, Beijing 100191, China
    2. Beijing Institute of Power Machinery, Beijing 100074, China
    3. School of Energy and Power Engineering, Beihang University, Beijing 100191, China

Online published: 2024-09-09

Supported by

The work was financially supported by the National Science and Technology Major Project (J2019-III-0014-0057) and the National Natural Science Foundation of China (92041001).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024

Abstract

Experimental analysis was conducted to study the impact of fuel-air mixing and dilution jet on the temperature distribution in a small gas turbine combustor using various optical diagnostic techniques. The strength and velocity of the swirler at the venturi exit were adjusted to modify the fuel-air mixture, which is presumed to dominate the heat release of the main combustion zone. Additionally, the dilution hole configuration, including the number and size of the holes, was varied to investigate the dilution effect on outlet temperature distribution. Various optical diagnostic techniques, such as particle image velocimetry, planar Mie scattering, and OH* chemiluminescence, were used to measure the flow field, fuel spray distribution, and flame structure, respectively. A reduction in swirling strength led to a decrease in the average flow rate in the throat, which improved the structure and symmetry of the axial vortex system in the sleeve, enhanced the mixing of fuel and gas in the dome swirling air, and ultimately, improved the temperature uniformity of the heat release zone. Compared to larger and sparse dilution jets, smaller and dense dilution jets tended to generate hot spots shifted towards the radial middle area.

Cite this article

CAI Wenzhe , WU Jing , HU Yingqi , YANG Zhiqiang , XUE Xin , LIN Yuzhen . Experimental Study of Fuel-Air Mixing and Dilution Jets on Outlet Temperature Distribution in a Small Gas Turbine Combustor[J]. Journal of Thermal Science, 2024 , 33(5) : 1883 -1896 . DOI: 10.1007/s11630-024-1983-3

References

[1] Fuligno L., Micheli D., Poloni C., An integrated approach for optimal design of micro gas turbine combustors. Journal of Thermal Science, 2009, 18(2): 173–184.
[2] Lefebvre A.H., Ballal D.R., Gas turbine combustion: Alternative fuels and emissions. Taylor & Francis Group, 2010.
[3] Chong C.T., Lam S.S., Hochgreb S., Effect of mixture flow stratification on premixed flame structure and emissions under counter-rotating swirl burner configuration. Applied Thermal Engineering, 2016, 105: 905–912.
[4] Dhanuka S.K., Temme J.E., Driscoll J., Unsteady aspects of lean premixed prevaporized gas turbine combustors: flame-flame interactions. Journal of Propulsion and Power, 2011, 27(3): 631–641.
[5] Temme J.E., Allison P.M., Driscoll J.F., Combustion instability of a lean premixed prevaporized gas turbine combustor studied using phase-averaged PIV. Combustion and Flame, 2014, 161(4): 958–970.
[6] Wang B., Zhang C., Lin Y., et al., Influence of main swirler vane angle on the ignition performance of TELESS-II combustor. Journal of Engineering for Gas Turbines and Power, 2016, 139(1): 011501.
[7] Mi X., Zhang C., Wang B., et al., Influence of main stage air splits on the ignition performance of TELESS-II combustor. ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, Charlotte, US, GT2017-63216.
[8] Bishop K., Allan W., Effects of fuel nozzle condition on gas turbine combustion chamber exit temperature distributions. ASME Turbo Expo 2010: Power for Land, Sea, and Air, Glasgow, UK, GT2010-23441.
[9] Karagozian A.R., Transverse jets and their control. Progress in Energy and Combustion Science, 2010, 36(5): 531–553.
[10] Walker R.E., Kors D.L., Multiple jet study. NASA-CR-121217, 1973.
[11] Srinivasan R., Berenfeld A., Mongia H.C., Dilution jet mixing program, phase 1. NASA-CR-168031, 1982.
[12] Srinivasan R., Berenfeld A., Mongia H.C., Dilution jet mixing program, phase 2. NASA CR-174624, 1982.
[13] Vranos A., Liscinsky D., True B., et al., Experimental study of cross-stream mixing in a cylindrical duct. 27th Joint Propulsion Conference, Sacramento, US, AIAA1991-2459.
[14] Oechsle V., Mongia H., Holdeman J., An analytical study of dilution jet mixing in a cylindrical duct. 29th Joint Propulsion Conference and Exhibit, Monterey, US, AIAA1993-2043.
[15] Liscinsky D., True B., Vranos A., et al., Experimental study of cross-stream mixing in a rectangular duct. 28th Joint Propulsion Conference and Exhibit, Nashville, US, AIAA1992-3090.
[16] Liscinsky D., True B., Holdeman J., Experimental investigation of crossflow jet mixing in a rectangular duct. 29th Joint Propulsion Conference and Exhibit, Monterey, US, AIAA1993-2037.
[17] Kroll J., Sowa W., Samuelsen G., et al., Optimization of circular orifice jets mixing into a heated crossflow in a cylindrical duct. 31st Aerospace Sciences Meeting, Reno, US, AIAA1993-249.
[18] Holdeman J., Srinivasan R., Coleman E., et al., Experiments in dilution jet mixing—Effects of multiple rows and non-circular orifices. 21st Joint Propulsion Conference, Monterey, US, AIAA1985-1104.
[19] Holdeman J., Srinivasan R., Berenfeld A., Experiments in dilution jet mixing. 19th Joint Propulsion Conference, Seattle, US, AIAA1983-1201.
[20] Holdeman J., Srinivasan R., Perspectives on dilution jet mixing. 22nd Joint Propulsion Conference, Huntsville, US, AIAA86-1611.
[21] Holdeman J., Perspectives on the mixing of a row of jets with a confined crossflow. 19th Joint Propulsion Conference, Seattle, US, AIAA1983-1200.
[22] Hatch M., Sowa W., Samuelson G., et al., Jet mixing into a heated cross flow in a cylindrical duct—Influence of geometry and flow variations. 30th Aerospace Sciences Meeting and Exhibit, Reno, US, AIAA1992-773.
[23] Holdeman J.D., Smith T.D., Clisset J.R., et al., A spreadsheet for the mixing of a row of jet with a confined crossflow. NASA/TM—2005-213137, 2005.
[24] Holdeman J.D., Clisset J.R., Moder J.P., Spreadsheet calculations of jets in crossflow: opposed rows of inline and staggered round holes. Heat and Mass Transfer, 2012, 48(2): 413–424.
[25] Bazdidi-Tehrani F., Teymoori A., Ghiyasi M., Sensitivity analysis of pollutants and pattern factor in a gas turbine model combustor due to changes in stabilizing jets characteristics. Journal of Thermal Science, 2022, 31(5): 1622–1641.
[26] Wang W., Yang S., Gao C., et al., Influence of turbulence schmidt number on exit temperature distribution of an annular gas turbine combustor using flamelet generated manifold. Journal of Thermal Science, 2020, 29(1): 58–68.
[27] Lu H., Liu F., Wang Y., et al., The effect of different reaction mechanisms on combustion simulation of a reverse-flow combustor. Journal of Thermal Science, 2020, 29(3): 793–812.
[28] Vignat G., Durox D., Candel S., The suitability of different swirl number definitions for describing swirl flows: Accurate, common and (over-) simplified formulations. Progress in Energy and Combustion Science, 2022, 89: 100969.
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