Influence of intake port shape on effective and ecological parameters of middle-speed diesel engine

The paper presents the numerical analysis of swirl motion generation inside the intake system of a middle-speed diesel engine. It also analyzes the processes of both mixture formation and air-fuel mixture combustion in the combustion chamber. The mathematical model is based on the three-dimensional non-stationary equations of momentum, energy, motion, mass transfer, and consistency of reacting substances in the Reynolds form with the addition of k-ζ-f turbulence model and the Coherent Flame Model (CFM), which are used for estimating the combustion chemical reaction rate. The authors solved the problem as follows: at first, an intake port shape with a higher swirl number was developed, and then effective and ecological parameters of the diesel engine with a modified shape of the intake ports in the cylinder head were calculated.

References

[1] Kavtaradze R.Z. Teoriya porshnevykh dvigateley. Spetsial’nye glavy [Theory of reciprocating engines. Specific chapters]. Moscow, MGTU im. N.E. Baumana Publ., 2008. 719 p.

[2] Woschni G., Zeilinger K., Kavtaradze R.Z. Air vortex motion in a high-speed diesel with four valves on a cylinder. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Mashinostr. [Herald of the Bauman Moscow State Tech. Univ., Mech. Eng.], 1997, no. 1, pp. 74-84 (in Russ.).

[3] Basshuysen R., Schafer F. (Hrsg.) Handbuch Verbrennungsmotor. 4. Auflage. Vieweg und Sohn Verlag. Wiesbaden, 2007. 1032 s.

[4] FIRE. Users Manual Version 2013. AVL List GmbH Graz, Austria, 2014 (License Agreement for Use of the Simulation Software AVL FIRE between Bauman Moscow State Technical Univ. and AVL List GmbH, 2014).

[5] Hanjalic K., Popovac M., Hadziabdic M. A Robust Near-Wall Elliptic-Relaxation Eddy-Viscosity Turbulence Model for CFD. Int. J. Heat Fluid Flow, 2004, no. 25, pp. 897-901.

[6] Tatschl R. et al. Advanced Turbulent Heat Transfer Modeling for IC-Engine Applications Using AVL FIRE. International Multidimensional Engine Modeling User’s Group Meeting. Detroit, 2006, pp. 1-10.

[7] 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 J. of Heat and Mass Transfer, 2009, vol. 52, no. 19-20, pp. 4308-4316.

[8] Kavtaradze R.Z., Onishchenko D.O., Zelentsov A.A., Finkel’berg L.A., Kostyuchenkov A.N. Simulation of processes in the "inlet collector-cylinder" system of aviation reciprocating engine with distributed fuel injection. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Mashinostr. [Herald of the Bauman Moscow State Tech. Univ., Mech. Eng.], 2012, no. 4, pp. 3-16 (in Russ.).

[9] Lanshin A.I., Finkelberg L.A., Kostyuchenkov A.N., Zelentsov A.A., Bakanov M.A. Investigation of Inlet Flow Swirl Influence on the Gasoline Aviation Piston Engine Characteristics. Vestnik VGTU [The Bulletin of VSTU], 2012, vol. 8, no. 2, pp. 96-99 (in Russ.).

[10] 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 (TVT), 2014, vol. 52, no. 2, pp. 294-309.

[11] Kavtaradze R.Z., Zelentsov A.A., Skripnik A.A. 3D Investigation of Features of Realization of Working Processes of Aircraft Piston Engines. Proceedings International User Conference Advanced Simulation Technologies (AST), 18-20 June 2013, Austria, Graz. 2013, pp. 1-9.