Computational and Experimental Study of Influence of Piston’s and Sleeve’s Thermal Insulation on Formation of Nitrogen Oxides in Combustion Products of High-Speed Diesel

Authors: Kavtaradze R.Z., Onishchenko D.O., Zelentsov A.A., Kadyrov S.M. Published: 29.08.2013
Published in issue: #4(85)/2011  


Category: Power-generating and Transport Machine Building  
Keywords: diesel, combustion chamber, thermal insulation, piston, sleeve, nitrogen oxides

Results of computational and experimental study of the working process of the base diesel and its modification are stated forth. The comparative analysis of 3D temperature fields of serial parts and parts with ceramic heat insulators is carried out. It is found that when the engine with the thermally insulated chamber operates on the very impoverished fuel mixture, the fuel consumption can be reduced as compared to that of the base engine without increase in concentrations of nitrogen oxides in combustion products. The practical recommendations are given concerning the selection and regulation of a number of parameters. Their specific values are determined for the GCh12/9.6 base engine and its heat-insulated variant, which make it possible to provide the accepted values for concentrations of nitrogen oxides in combustion products.