Soot particle trajectories of a Di diesel engine at 18° ATDC crankshaft angle

• Published in: IOP conference series. Materials Science and Engineering 2013, Vol.50 (1), p.1-6
• Main Authors: Hafidzal, M H M, Mahmood, W M F W, Manaf, M Z A, Zakaria, M S, Saadun, M N A, Nordin, M N A
• Format: Article
• Language: English
• Subjects: Algorithms; Combustion; Combustion chambers; Computer simulation; Crankshafts; Cylinders; Diameters; Diesel engines; Drag; Engine valves; Inlet valves; Interpolation; Lubricants; Matlab; Particle trajectories; Pollutants; Runge-Kutta method; Soot; Walls
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/50/1/012003

Among the major pollutants of diesel engine is soot. Soot is formed as an unwelcome product in combustion systems. Soot emission to the atmosphere leads to global air warming and health problems. Furthermore, deposition of soot particles on cylinder walls contaminates lubricant oil hence increases its viscosity. This reduces durability of lubricant oil, causing pumpability problems and increasing wear. Therefore, it is necessary to study soot formation and its movement in diesel engines. This study focuses on soot particle trajectories in diesel engines by considering the diameter of soot particles that were formed at 18[degrees] ATDC crankshaft angle. These soot particle movements are under the influence of drag force with different radial, axial and angular settings and simulated by using MATLAB routine. The mathematical algorithm which was used in the MATLAB routine is trilinear interpolation and 4th order of Runge Kutta. Simulation was carried out for a combustion system of 4 valves DI diesel engine from inlet valve closing (IVC) to exhaust valve opening (EVO). The results show that small diameter of soot particles were transferred near the cylinder wall while bigger soot particle mostly moved in inner radius of the combustion chamber.