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Journal of Thermal Science

, Volume 29, Issue 1, pp 69–80 | Cite as

Investigations on Emission Characteristics of a Liquid-Fueled Trapped Vortex Combustor

  • Zejun WuEmail author
  • Xiaomin HeEmail author
Article
  • 15 Downloads

Abstract

The combustion and emission formation process of liquid fuel in the trapped vortex combustor (TVC) are very complicated. A trapped vortex combustor with replaceable bluff-bodies was designed to investigate these processes. The bluff-body widths varied from 0.021 m to 0.036 m. Experimental tests were carried out. Liquid RP-3 aviation kerosene was used in the tests. Emissions were measured under atmospheric pressure. The combustion process was analyzed theoretically in the viewpoints of relative evaporation time, mixing time and reaction time. Numerical simulations were also conducted to help analyze the formation and depletion processes of pollutants in TVC. The results reveal that atomization was a critical factor for formation and depletion processes of pollutants. By controlling mixing speed of burned and unburned gases and thus fuel-air uniformity, turbulence intensity could also affect emission levels. In addition, residence time also affected the emissions by affecting combustion completeness and the time for NOx formation. All these factors were combined in a complicated way to affect combustion process and pollutant emissions.

Keywords

trapped vortex combustor gas pollutant emissions atomization turbulence intensity residence time 

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Notes

Acknowledgements

This work was supported by the Fundamental Research Funds for the Central Universities (No. 106112017CDJXY320001) and the open funds of Jiangsu Province Key Laboratory of Aerospace Power System (No. CEPE2018009).

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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

  1. 1.College of Aerospace EngineeringChongqing UniversityChongqingChina
  2. 2.Chongqing Key Laboratory of Heterogeneous Material MechanicsChongqingChina
  3. 3.College of Energy and Power EngineeringNanjing University of Aeronautics and AstronauticsNanjingChina
  4. 4.Jiangsu Province Key Laboratory of Aerospace Power SystemNanjingChina

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