Catalytic Converter Experiment Report

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Numerical and Experimental Investigation of Back Pressure in Various Models of Catalytic Converter
S.MOHANKUMAR1 and P.SENTHILKUMAR2
1 Research scholar Department of Automobile Engineering, MIT campus, Anna University,
Chennai, India.
2 Assistant Professor, Department of Automobile Engineering, MIT campus, Anna University,
Chennai, India. 1smkmts@gmail.com, 2mit_senthil@yahoo.com Abstract: Diesel engine due to its great performance, output power and being less expensive is found to be used in both industrial and domestic applications. The main drawback lies is the release of harmful gases like HC, CO, NOx and particulate matter(PM) into the atmosphere. Catalytic converter plays a crucial role to control these pollutants after combustion.
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5.3 Boundary conditions

Boundary conditions used for this study were mostly considered as static in nature. For the inlet and outlet boundary conditions the pressure and temperature were considered as static. The operating pressure will be maintained at 1.33 atm and for outlet static pressure has specified as 1.15 bar. No slip boundary condition was applied on all wall surfaces. A high turbulence intensity of 10 % flow have been assumed for the inlet.

5.4 Properties of fluid considered

Exhaust gas properties used for this work as air operating at 350ºC and 1.35 bar. Density and Viscosity values are considered as 0.7600 kg/m3 and 3.3052*10-5 Pa Sec. Specific heat and thermal conductivity of working fluid are 1057.644 J/kg-K and 0.0240 W/m-K.

Mathematical
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Specially designed converter permits free flow of exhaust gases causing less restriction or blocking. Since the trap designed produces less back pressure is also leads to better fuel saving and better engine performance. It is estimated that trap designed has better collection efficiency and regeneration may be done for every 10,000 kilometers of engine run. Durability of catalyst is enhanced, since the trap designed is very hard for reducing wear and tear. After performing the analysis with unique boundary conditions for different lengths, It was observed that, ultimately reduces the material cost required for fabrication of converter, This also leads to reduction in manufacturing cost of converter greatly. Further optimization will be done in design to further reduce the back pressure for future

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