Development of a semitransparent ceramic heat-insulation for an eco-friendly combustion chamber of Low-Heat-Rejection diesel

International Automobile Scientific Forum (IASF-2017) Intelligent Transport Systems

Merzlikin, V.G.^1,2 ; Gutierrez, M.O.^3 ; Makarov, A.R.^4 ; Bekaev, A.A.^1 ; Bystrov, A.V.^2 ; Zagumennov, F.A.^5

Department of Technology and Equipment of Mechanical Engineering, Moscow Polytechnic University, Bolshaya Semenovskaya, 38, Moscow

107023, Russia^1

Industrial Economics Department, Plekhanov Russian University of Economics, Stremyanny, 36, Moscow

117997, Russia^2

Tablet School Company, General Maldonado y Belisario Quevedo, Latacunga

0501444, Ecuador^3

Department of Mechanical Engineering and Instrument Making, RUDN University, Miklukho-Maklaya, 6, Moscow

117198, Russia^4

Department of Instrument Production Techniques, Bauman Moscow State Technical University, 2-ya Baumanskaya, 5/1, Moscow

105005, Russia^5

关键词: Low heat rejection;    Mie scattering theory;    Porosity of coatings;    Rotation frequencies;    Semi-transparent ceramics;    Specific fuel consumption;    Structural composition;    Temperature profiles;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/315/1/012017/pdf
DOI  :  10.1088/1757-899X/315/1/012017

来源: IOP

【 摘 要 】

Efficiency of diesel has been studied using well-known types of the ceramic heat-insulating HICs- or thermal barrier TBCs-coatings. This problem is relevant for a high-speed diesel combustion chamber in which intensive radiant component (near IR) reaches ∼50% within total thermal flux. Therefore, in their papers the authors offered new concept of study these materials as semitransparent SHICs-, STBCs-coatings. On the Mie scattering theory the effect of selection of the specific structural composition and porosity of coatings on the variation of their optical parameters is considered. Conducted spectrophotometric modeling of the volume-absorbed radiant energy by the coating had determined their acceptable temperature field. For rig testings coated piston using selected SHIC (PSZ-ceramic ZrO2+8%Y2O3) with a calculated optimum temperature gradient was chosen. A single cylinder experimental tractor diesel was used. At rotation frequency n > 2800 rpm the heat losses were no more than 0.2 MW/m2. Executed testings showed ∼2-3% lower specific fuel consumption in contrast the diesel with uncoated piston. Effective power and drive torque were ∼2-5% greater. The authors have substantiated the growth the efficiency of this Low-Heat-Rejection (LHR) diesel due to the known effect of soot deposition gasification at high speed.Then unpolluted semitransparent ceramic thermal insulation forms the required thermoradiation fields and temperature profiles and can affect regulation of heat losses and reduction of primarily nitrogen dioxide generation.