Turbulence inducer in a catalytic converter channel

A catalytic converter comprising a channel for conducting a gas flow forwardly in a longitudinal direction;

• the channel coated with a catalyst and having at least first and second turbulence generators spaced apart in the longitudinal direction for making the gas flow turbulent;
• each turbulence generator including a rear face inclined forwardly at an angle of from 35 to 60° from a base of the channel and facing rearwardly, a connecting face extending forwardly from a free edge of the rear face at a height e from the channel base and having a length B in the longitudinal direction, and a front face projecting toward the base from a front edge of the connecting face and facing forwardly;
• the first turbulence generator disposed closer to an inlet of the channel than the second turbulence generator;
• a longitudinal center of the first turbulence generator being spaced longitudinally from the channel inlet by a distance X1, wherein:
• 0.01 < X 1 D h · R e · S c < 0.015
• wherein:
• Dh is the hydraulic diameter of the channel
• Re is the Reynold's number and
• Sc is the Schmidt's number 1 of the gas;
• and further wherein:
• a ratio of the height e to the hydraulic diameter Dh is between 0.35 and 1.0;
• a ratio of a distance P between longitudinal centers of the first and second turbulence generators to said height e is between 20 and 50;
• and,
• a ratio of the length B of the connecting face to the height e is between 1.5 and 4.0.