Burner, especially for vehicle applications, e.g. in reformer for fuel cell system, has air feed and mixing zone for mixing air and exhaust gas arranged in exhaust gas outlet

摘要

The device has a housing with an inlet, a combustion chamber, an ignition device and an exhaust gas outlet. The combustion chamber is partly filled with material whose porosity along the gas flow direction varies so a critical Peclet number is achieved at the boundaries or in a defined zone by adjusting the pore size; no flame can exist bellows this pore size. An air feed and an air-gas mixing zone are arranged in the exhaust gas outlet. The device has a housing with an inlet, a combustion chamber, an ignition device and an exhaust gas outlet (5). Part of the combustion chamber is filled with porous material whose porosity along the flow direction of a gas varies so that a critical Peclet number is achieved at the boundaries or in a defined zone by adjusting the pore size, whereby no flame can exist bellows this pore size. An air feed (6) and a mixing zone (7) for the air and exhaust gas are arranged in the exhaust gas outlet.