Volume : 6, Issue : 6, June - 2017

Analysis of exhaust gas flow in a Three way Catalytic Converter of a Diesel Automobile using CFD Software

Abhilash Udhari, Shravan Kumar Nagapuri

Abstract :

<p>&nbsp;<b style="text-align: justify;"><i><span style="font-size:12.0pt;line-height:115%;font-family:&quot;Times New Roman&quot;,serif">Stringent Euro pollution norms stipulated for exhaust emissions in a diesel automobile has inspired many researchers all over the world. The exhaust gas flow was studied for four different diffuser geometries. To obtain realistic values of geometric dimensions, reverse engineering technique was used on a second hand Catalytic converter purchased from market. The number of cells per square centimeter and the sectional dimension of square channels of monolith were measured. The geometry was constructed in ICEM CFD software. The catalytic converter was fitted on a single cylinder diesel engine in the Laboratory. Finally these realistic values of exhaust gas flow, Engine speed, pressures and velocities were used along with the geometry for running the FLUENT CFD software. This exercise was repeated for the four different geometries of diffuser. Thus using computer analysis and experiments, diffuser geometries were optimized. The triangular, circular and hexagonal cross sections of monolith channels are being analyzed in the CFD laboratory at present. The present paper reports results obtained on Square channels only, with an aim to obtain minimum back pressure on the engine.</span></i></b></p> <p class="MsoNormal" style="text-align:justify"><b><i><span style="font-size:12.0pt;line-height:115%;font-family:&quot;Times New Roman&quot;,serif"><o:p></o:p></span></i></b></p>