Effect of Air-Fuel Mixture Homogenisation and Exhaust Gas Recirculation on Formation of Nitrogen Oxides and Soot in a Diesel Combustion Chamber

Authors: Kavtaradze R.Z., Bakhramov E.V. Published: 09.04.2018
Published in issue: #2(119)/2018  

DOI: 10.18698/0236-3941-2018-2-44-61

Category: Power, Metallurgic and Chemical Engineering | Chapter: Heat Engines  
Keywords: diesel, 3D simulation, partially homogeneous combustion, exhaust gas recirculation, formation of nitrogen oxides and soot

We present the results of investigating work cycles of a high-speed diesel obtained by means of using a 3D model that considers formation kinetics for nitrogen oxides and soot, said model validated through experimental data. We analysed various work cycle concepts: the stock (basic) option featuring no exhaust gas recirculation, as well as a number of alternative ones: a modified stock one with added recirculation and altered injector nozzle design, and two options featuring partially homogeneous combustion involving fivefold fuel injection. We performed a comparative analysis of environmental performance and performance characteristics of the work cycle options under study, which makes it possible to evaluate their potential


[1] The analysis of NO-formation and methods of calculation of NO-concentration in the piston engines working on traditional and alternative fuel. P. 1, p. 2. Transport na al'ternativnom toplive [Alternative Fuel Transport], 2011, no. 5 (23), pp. 65–71; no. 6 (24), pp. 12–19 (in Russ.).

[2] Kavtaradze R.Z. Teoriya porshnevykh dvigateley. Spetsialnye glavy [Theory of reciprocating engines. Special chapters]. Moscow, Bauman MSTU Publ., 2016. 590 p.

[3] Reitz R.D., Duraisamy G. Review of high efficiency and clean reactivity controlled compression ignition (RCCI) combustion in internal combustion engines. Progress in Energy and Combustion Science, 2015, vol. 46, pp. 12–71. DOI: 10.1016/j.pecs.2014.05.003 Available at: https://www.sciencedirect.com/science/article/pii/S0360128514000288

[4] Kavtaradze R.Z., Sergeev S.S. New alternative (partially homogeneous) combustion process as a method for reduction of concentrations of nitric oxides and soot in combustion products of diesel. High Temperature, 2014, vol. 52, no. 2, pp. 282–296. DOI: 10.1134/S0018151X14010106 Available at: https://link.springer.com/article/10.1134/S0018151X14010106

[5] Noehre C., Anderson M., Johnson B., Hultqvist A. Characterization of partially premixed combustion. SAE Technical Paper 2006-01-3412. Lund University, 2006. 19 p.

[6] Muller E., Weiskirch Ch., Bach E., Emmrich Th., Schneemann A. Homogene dieselverbrennung — verfahren zur emissionsreduzierung. T. 2. Untersuchungen am Nfz-Motor. MTZ, 2006, vol. 67, no. 11, pp. 906–917. DOI: 10.1007/BF03225431 Available at: https://link.springer.com/article/10.1007/BF03225431

[7] Schneemann A., Emmrich Th., Bach E. Oberflachentemperaturmessung und lokale Warmeubergang. Informationstagung Motoren, vol. R 535. Wurzburg, 2006, pp. 281–305.

[8] FIRE. Users manual version 2016. Graz, Austria, AVL List GmbH, 2016.

[9] Baulch D.L., Cobos C.I., Cox A.M. Compilation of rate data for combustion modeling. Suppl. I. J. Phys. Chem., 1994, vol. 23, pp. 847–859.

[10] Frolov S.M., Basevich V.Y., Skripnik A.A. Modeling of soot formation in internal combustion engines. Mezhdunarodnaya konferentsiya «Dvigatel' 2007». Sb. nauch. trudov [Proc. Int. Conf. "Engine 2007"]. Moscow, Bauman MSTU Publ., 2007, pp. 28–29 (in Russ.).

[11] Kavtaradze R.Z., Onishchenko D.O., Zelentsov A.A., Sergeev S.S. The influence of rotational charge motion intensity on nitric oxide formation in gas-engine cylinder. International Journal of Heat and Mass Transfer, 2009, vol. 52, no. 19-20, pp. 4308–4316. DOI: 10.1016/j.ijheatmasstransfer.2009.03.060 Available at: https://www.sciencedirect.com/science/article/pii/S0017931009002531

[12] Kavtaradze R.Z. Improving the ecological indices of a hydrogen diesel engine with direct gaseous hydrogen injection. Journal of Machinery Manufacture and Reliability, 2016, vol. 45, no. 4, pp. 307–315. DOI: 10.3103/S1052618816040051 Available at: https://link.springer.com/article/10.3103/S1052618816040051

[13] Leontyev A.I., Kavtaradze R.Z., Onishchenko D.O., Golosov A.S., Pankratov S.A. Improvement of piston engine operation efficiency by direct conversion of the heat of exhaust gases into electric energy. High Temperature, 2016, vol. 54, no. 1, pp. 104–111. DOI: 10.1134/S0018151X16010053

[14] Kavtaradze R.Z., Zinovyev I.A. Partial homogenization effect of the combustion process on the environmental performance of diesel. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Mashinostr. [Herald of the Bauman Moscow State Tech. Univ., Mechan. Eng.], 2016, no. 4, pp. 113–127 (in Russ.). DOI: 10.18698/0236-3941-2016-4-113-127

[15] Kavtaradze R.Z., Onishchenko D.O., Zinovyev I.A., Golosov A.S. Influence of the characteristic of multiinjection on local formations of nitrogen oxides and soot in the chamber of combustion of the diesel engine. Izvestiya RAN. Energetika [Proceedings of the RAS. Power Engineering], 2016, no. 5, pp. 152–159 (in Russ.).