Numerical Simulating for Coupling Heat-Transfer from Automobile Exhaust Gases to Thermoelectric Material Pipe

The exhaust gas pipe with three branch pipes of diesel engine is analyzed in the paper. A coupling model of heat transfer between solid and gas is set up, and a heat transfer equation is added into the two dimensional model,. The gas flow filed of exhaust pipe has been simulated numerically with SIMPLE method. The velocities, pressure and temperature are compared. The heat transfer from exhaust pipe to the thermoelectric generator around the pipe is simulated in detail; it is shown that the velocities and pressure change a little in main pipe, and the heat flux through the boundary increases. The temperature difference in the thermoelectric material wall is formed well for generating electric power.