THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

Zhiqiang Han

,

Xuantao Li

,

Wei Tian

,

Jia Fang

,

Xueshun Wu

,

Zinong Zuo

,

Yi Wu

,

Yan Yan

online first only

Experimental study on ignition characteristic and performance of a two-stroke engine fueled with aviation kerosene

ABSTRACT
Two-stroke spark ignition engines are widely used in Unmanned Aerial Vehicles. Aviation kerosene offers advantages over aviation gasoline due to its higher flash point and lower volatility, making it likely to be adopted more widely in the future. However, the poor evaporation and atomization characteristics of aviation kerosene result in suboptimal ignition performance, especially in the engine start-up phase. To explore the fitting mixture concentration and temperature conditions for achieving better ignition performance of aviation kerosene, A series of experimental studies are conducted on a two-stroke engine. The intrinsic factors affecting engine performance are analyzed. The experimental results indicate that optimal ignition characteristics, maximum power output, and a reduced misfire rate can be achieved at mixture concentration of 0.6 and mixture temperature of 80°C. Furthermore, the misfire rate is most sensitive to the combustion duration, while the cyclic variations show significant sensitivity to ignition delay. The results provide guidance for optimizing ignition performance during the start-up phase of two-stroke engines fueled with aviation kerosene.
KEYWORDS
Two-stroke spark ignition engine, Unmanned Aerial Vehicles, Aviation kerosene, experimental study, Ignition characteristics
PAPER SUBMITTED: 2024-10-27
PAPER REVISED: 2024-12-27
PAPER ACCEPTED: 2025-01-02
PUBLISHED ONLINE: 2025-02-16
DOI REFERENCE: https://doi.org/10.2298/TSCI241027018H
REFERENCES
  1. Newcome, L.R., Unmanned aviation: A brief history of unmanned aerial vehicles, AIAA, Reston, USA, 2004
  2. Hayat S., et al., Survey on unmanned aerial vehicle networks for civil applications: A communications viewpoint, IEEE Communications Surveys & Tutorials, 18(2016), 4, pp. 2624-2661
  3. Zhou, G., et al., Foreword to the Special Issue on Unmanned Airborne Vehicle (UAV) Sensing Systems for Earth Observations. IEEE Transactions on Geoscience and Remote Sensing. 47(2009), 3, pp. 687-689
  4. Nex F., Remondino F., UAV for 3D mapping applications: A review, Appl Geomat, 6(2014), pp. 1-15
  5. Pickett, B. M. et al., Fire safety tests comparing synthetic jet and diesel fuels with JP-8, The Lancet, 46(2010), 3, pp. 89-95
  6. Falkowski, D., et al., The performance of a spark-ignited stratified-charge two stroke engine operating on a kerosine based aviation fuel, SAE Transactions, 106(1997), pp. 2169-2177
  7. Le N., et al., Effects of injection timing and compression ratio on the combustion performance and emissions of a two-stroke DISI engine fueled with aviation kerosene, Applied Thermal Engineering, 161(2019), pp. 114-124
  8. Liu R., et al., Combustion characteristics of a two-stroke spark ignition UAV engine fueled with gasoline and kerosene (RP-3), Aircraft Engineering and Aerospace Technology, 91(2019), 1, pp. 163-170
  9. Zhao Z., Cui H., Numerical investigation on combustion processes of an aircraft piston engine fueled with aviation kerosene and gasoline, Energy, 239(2022), 122264
  10. Suhy P., et al., The feasibility of a kerosene fueled spark ignited two-stroke engine, International Off-Highway & Powerplant Congress and Exposition, Milwaukee, USA, 1991
  11. Zhou Y., et al., Technologies and studies of gas exchange in two-stroke aircraft piston engine: A review, Chinese Journal of Aeronautics, 37(2024), 1, pp. 24-50
  12. Wang L., et al., Experimental study of aviation kerosene engine with PJI system, Energy, 248(2022), 123590
  13. Hooper P., Experimental experience of cold starting a spark ignition UAV engine using low volatility fuel, Aircraft Engineering and Aerospace Technology, 89(2017), 1, pp. 106-111
  14. Elliott L., et al., Genetic algorithms for optimisation of chemical kinetics reaction mechanisms, Progress in Energy and Combustion Science, 30(2004), 30, pp. 297-328
  15. Yu B., et al., Development of a Chemical-Kinetic Mechanism of a Four-Component Surrogate Fuel for RP-3 Kerosene, ACS Omega, 6(2021), 36, pp. 23485-23494
  16. Mao Y., et al., Experimental and kinetic modeling study of ignition characteristics of RP-3 kerosene over low-to-high temperature ranges in a heated rapid compression machine and a heated shock tube, Combustion and Flame, 203(2019), pp. 157-169
  17. Yang Z., et al., Ignition characteristics of an alternative kerosene from direct coal liquefaction and its blends with conventional RP-3 jet fuel, Fuel, 291(2021), 120258
  18. Meng K., et al., Experimental investigation on ignition, combustion and micro-explosion of RP-3, biodiesel and ethanol blended droplets, Fuel, 178(2020), 115649
  19. Liu J., et al., A new surrogate fuel for emulating the physical and chemical properties of RP-3 kerosene, Fuel, 259(2020), 116210
  20. Wang C., et al., Explosion behaviors of aviation kerosene in a 20-L spherical vessel, Aerospace Science and Technology, 152(2024), 109308
  21. Chen Z., et al., Effect of equivalence ratio on spark ignition combustion of an air-assisted direct injection heavy-fuel two-stroke engine, Fuel, 313(2022), 122646
  22. Wei D., et al., Ignition and combustion characteristics of wall-impinged kerosene (RP-3) fuel spray with varying injection parameters, Thermal Science, 24(2020), pp. 171-181
  23. Chang C., et al., Experimental Research on Cold Start of PFI Two-Stroke Spark-Ignition Kerosene Engine, Journal of Energy Engineering, 146(2020), 04020030
  24. Li S., et al., Study on the ignition factor of piston kerosene engine, Advanced Materials Research, 779(2013), pp. 705-710
  25. Zhang S., et al., Orthogonal experimental study on the cold-start control strategies of a SI aviation piston engine fueled with kerosene, Fuel, 328(2022), 124880
  26. Liang J., et al., The vitiation effects of water vapor and carbon dioxide on the autoignition characteristics of kerosene, Acta Mechanica Sinica, 30(2014), 4, pp. 485-494
  27. Javed I., et al., Autoignition and combustion characteristics of kerosene droplets with dilute concentrations of aluminum nanoparticles at elevated temperatures, Combustion and Flame, 162(2015), 3, pp. 774-787
  28. Javed I., et al., Evaporation characteristics of kerosene droplets with dilute concentrations of ligand-protected aluminum nanoparticles at elevated temperatures, Combustion and Flame, 160(2013), pp. 2955-2963
  29. Heywood J.B., Internal combustion engine fundamentals, New York, USA, 1988
  30. Chang C., et al., Experimental Research on Cold Start of PFI Two-Stroke Spark-Ignition Kerosene Engine, Journal of Energy Engineering, 146(2020), 04020030
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Experimental study on ignition characteristic and performance of a two-stroke engine fueled with aviation kerosene