Combustion and emissions of RP-3 jet fuel and diesel fuel in a single-cylinder diesel engine

Abstract

The combustion characteristics and emission behaviors of RP-3 jet fuel were studied and compared to commercial diesel fuel in a single-cylinder compression ignition (CI) engine. Engine operational parameters, including engine load (0.6, 0.7, and 0.8 MPa indicating the mean effective pressure (IMEP)), the exhaust gas recirculation (EGR) rate (0%, 10%, 20%, and 30%), and the fuel injection timing (−20, −15, −10, and −5 ° crank angle (CA) after top dead center (ATDC)) were adjusted to evaluate the engine performances of RP-3 jet fuel under changed operation conditions. In comparison to diesel fuel, RP-3 jet fuel shows a retarded heat release and lagged combustion phase, which is more obvious under heavy EGR rate conditions. In addition, the higher premixed combustion fraction of RP-3 jet fuel leads to a higher first-stage heat release peak than diesel fuel under all testing conditions. As a result, RP-3 jet fuel features a longer ignition delay (ID) time, a shorter combustion duration (CD), and an earlier CA50 than diesel fuel. The experimental results manifest that RP-3 jet fuel has a slightly lower indicated thermal efficiency (ITE) compared to diesel fuel, but the ITE difference becomes less noticeable under large EGR rate conditions. Compared with diesel fuel, the nitrogen oxides (NO_x) emissions of RP-3 jet fuel are higher while its soot emissions are lower. The NO_x emissions of RP-3 can be effectively reduced with the increased EGR rate and delayed injection timing.

Key words： RP-3 jet fuel; diesel; engine; combustion; emissions

Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant Nos. 52022058, 51776124, and 51861135303) and the Ministry of Education of China (Grant No. 6141A020335).

Competing interests

The authors declare that they have no competing interests.

References

1 Hoseini S S, Sobati M A. Performance and emission characteristics of a diesel engine operating on different water in diesel emulsion fuels: optimization using response surface methodology (RSM). Frontiers in Energy, 2019, 13(4): 636–657

2 Wei H, Yu J, Zhou L. Improvement of engine performance with high compression ratio based on knock suppression using Miller cycle with boost pressure and split injection. Frontiers in Energy, 2019, 13(4): 691–706

3 Liang X, Zhang J, Li Z, Effects of fuel combination and IVO timing on combustion and emissions of a dual-fuel HCCI combustion engine. Frontiers in Energy, 2020, 14(4): 778–789

4 Zheng Z, Yue L, Liu H, Effect of two-stage injection on combustion and emissions under high EGR rate on a diesel engine by fueling blends of diesel/gasoline, diesel/n-butanol, diesel/gasoline/n-butanol and pure diesel. Energy Conversion and Management, 2015, 90: 1–11

5 Liu H, Zhang P, Liu X, Laser diagnostics and chemical kinetic analysis of PAHs and soot in co-flow partially premixed flames using diesel surrogate and oxygenated additives of n-butanol and DMF. Combustion and Flame, 2018, 188: 129–141

6 Chen H, Xie B, Ma J, NO_x emission of biodiesel compared to diesel: higher or lower. Applied Thermal Engineering, 2018, 137: 584–593

7 Chen H, Su X, Li J, Zhong X. Effects of gasoline and polyoxymethylene dimethyl ethers blending in diesel on the combustion and emission of a common rail diesel engine. Energy, 2019, 171: 981–999

8 Dagaut P, Cathonnet M. The ignition, oxidation, and combustion of kerosene: a review of experimental and kinetic modeling. Progress in Energy and Combustion Science, 2006, 32(1): 48–92

9 Lu Y, Pan J, Fan B, Research on the application of aviation kerosene in a direct injection rotary engine–Part 1: fundamental spray characteristics and optimized injection strategies. Energy Conversion and Management, 2019, 195: 519–532

10 Lu Y, Pan J, Fan B, Research on the application of aviation kerosene in a direct injection rotary engine–Part 2: spray combustion characteristics and combustion process under optimized injection strategies. Energy Conversion and Management, 2020, 203: 112217

11 Bowden J N, Westbrook S R, LePera M E. Jet kerosene fuels for military diesel application. Journal of Fuels and Lubricants, 1989, 4: 810–832

12 Lee J, Bae C. Application of JP-8 in a heavy duty diesel engine. Fuel, 2011, 90(5): 1762–1770

13 Shi Z, Lee C F, Wu H, Optical diagnostics of low-temperature ignition and combustion characteristics of diesel/kerosene blends under cold-start conditions. Applied Energy, 2019, 251: 113307

14 Lin Tay K, Yu W, Zhao F, From fundamental study to practical application of kerosene in compression ignition engines: an experimental and modeling review. Proceedings of the Institution of Mechanical Engineers. Part D, Journal of Automobile Engineering, 2020, 234(2–3): 303–333

15 Patil K R, Thipse S S. Experimental investigation of CI engine combustion, performance and emissions in DEE-kerosene-diesel blends of high DEE concentration. Energy Conversion and Management, 2015, 89: 396–408

16 Bayındır H, Zerrakki Işık M, Aydın H. Evaluation of combustion, performance and emission indicators of canola oil-kerosene blends in a power generator diesel engine. Applied Thermal Engineering, 2017, 114: 234–244

17 Chen G, Gamble J N, McAndrew D W, Analytical and experimental investigation of medium-speed diesel engine using a kerosene fuel. In: Proceedings of ASME 2006 Internal Combustion Engine Division Spring Technical Conference, Aachen, Germany, 2008

18 Tay K L, Yang W, Zhao F, A numerical study on the effects of boot injection rate-shapes on the combustion and emissions of a kerosene-diesel fueled direct injection compression ignition engine. Fuel, 2017, 203: 430–444

19 Tay K L, Yang W, Zhao F, Numerical investigation on the combined effects of varying piston bowl geometries and ramp injection rate-shapes on the combustion characteristics of a kerosene-diesel fueled direct injection compression ignition engine. Energy Conversion and Management, 2017, 136: 1–10

20 Yu W, Zong Y, Lin Q, Experimental study on engine combustion and particle size distributions fueled with Jet A-1. Fuel, 2020, 263: 116747

21 Duan Y, Han D, Li P, Experimental study on injection and macroscopic spray characteristics of ethyl oleate, jet fuel, and their blend on a diesel engine common rail system. Atomization and Sprays, 2015, 25(9): 777–793

22 Park Y, Bae C, Mounaïm-Rousselle C, Application of jet propellant-8 to premixed charge ignition combustion in a single-cylinder diesel engine. International Journal of Engine Research, 2015, 16(1): 92–103

23 Yu W, Yang W, Tay K, Macroscopic spray characteristics of kerosene and diesel based on two different piezoelectric and solenoid injectors. Experimental Thermal and Fluid Science, 2016, 76: 12–23

24 Jing W, Roberts W L, Fang T. Spray combustion of Jet-A and diesel fuels in a constant volume combustion chamber. Energy Conversion and Management, 2015, 89: 525–540

25 Volgin S N, Belov I V, Likhterova N M, Feasibility study for using jet fuel in diesel engines. Chemistry and Technology of Fuels and Oils, 2019, 55(3): 243–258

26 Lee J, Oh H, Bae C. Combustion process of JP-8 and fossil diesel fuel in a heavy duty diesel engine using two-color thermometry. Fuel, 2012, 102: 264–273

27 Lee H. Biodiesel, HSD, and JP-8 combustion process and emission characteristics in a dual-stage fuel injection condition. International Journal of Energy and Power Engineering, 2014, 3(4): 209–216

28 Lee J, Lee J, Chu S, Emission reduction potential in a light-duty diesel engine fueled by JP-8. Energy, 2015, 89: 92–99

29 Lee H, Jeong Y. Diesel (ULSD, LSD, and HSD), biodiesel, kerosene, and military jet propellants (JP-5 and JP-8) applications and their combustion visualization in a single cylinder diesel engine. Naval Engineers Journal, 2016, 128(4): 97–106

30 Uyumaz A, Solmaz H, Yılmaz E, Experimental examination of the effects of military aviation fuel JP-8 and biodiesel fuel blends on the engine performance, exhaust emissions and combustion in a direct injection engine. Fuel Processing Technology, 2014, 128: 158–165

31 Labeckas G, Slavinskas S, Vilutiene V. Combustion, performance and emission characteristics of diesel engine operating on Jet fuel treated with cetane improver. In: Engineering for Rural Development International Scientific Conference, Jelgava, Latvia, 2013

32 Chiatti G, Chiavola O, Palmieri F. Impact on combustion and emissions of jet fuel as additive in diesel engine fueled with blends of petrol diesel, renewable diesel and waste cooking oil biodiesel. Energies, 2019, 12(13): 2488

33 Chen L, Ding S, Liu H, Comparative study of combustion and emissions of kerosene (RP-3), kerosene-pentanol blends and diesel in a compression ignition engine. Applied Energy, 2017, 203: 91–100

34 Chen L, Raza M, Xiao J. Combustion analysis of an aviation compression ignition engine burning pentanol-kerosene blends under different injection timings. Energy & Fuels, 2017, 31(9): 9429–9437

35 Kang D, Kim D, Kalaskar V, Experimental characterization of jet fuels under engine relevant conditions–Part 1: effect of chemical composition on autoignition of conventional and alternative jet fuels. Fuel, 2019, 239: 1388–1404

36 Wu Z, Mao Y, Raza M, Surrogate fuels for RP-3 kerosene formulated by emulating molecular structures, functional groups, physical and chemical properties. Combustion and Flame, 2019, 208: 388–401

37 ASTM International. ASTM D7668–14 standard test method for determination of derived cetane number (DCN) of diesel fuel oils–ignition delay and combustion delay using a constant volume combustion chamber method. 2014, available at the website of astm.org

38 Zhao Y, He X, Li M, Ignition, efficiency and emissions of RP-3 kerosene in a three-staged multi-injection combustor. Fuel Processing Technology, 2021, 213: 106635

39 John B H. Internal Combustion Engine Fundamentals. 2nd ed. New York: McGraw-Hill Education, 2018

40 Han D, Zhai J, Huang Z. Autoignition of n-hexane, cyclohexane, and methylcyclohexane in a constant volume combustion chamber. Energy & Fuels, 2019, 33(4): 3576–3583

41 Duan Y, Liu W, Huang Z, An experimental study on spray auto-ignition of RP-3 jet fuel and its surrogates. Frontiers in Energy, 2021, 15(2): 396–404

42 Wang J, An M, Yin B, Combustion and emission characteristics of a diesel engine fueled with diesel–rocket propellant-3 wide distillation blended fuels. Journal of Energy Engineering, 2020, 146(4): 04020025

43 Ren Z, Liu W, Huang Z, Spray auto-ignition behaviors of diesel and jet fuel at reduced oxygen environments. Combustion Science and Technology, 2020

44 Liu H, Ma S, Zhang Z, Study of the control strategies on soot reduction under early-injection conditions on a diesel engine. Fuel, 2015, 139: 472–481