Patent ID: 8308477

Claim:
An air-fuel combustion system comprising an air/fuel transfer duct adapted to discharge an air-and-fuel mixture into a combustion chamber, an air-supply duct containing a first airflow channel in fluid communication with the air/fuel transfer duct, a separate second airflow channel in fluid communication with the air/fuel transfer duct, and a swirler located in the second airflow channel and configured to swirl combustion air flowing through the second airflow channel, and a fuel-supply duct coupled to the first airflow channel to discharge a first fuel stream generated from fuel flowing in the fuel-supply duct into combustion air flowing in the first airflow channel to produce a straight-line air/fuel mixture discharged from the first airflow channel into the air/fuel transfer duct and coupled to the second airflow channel to discharge a second fuel stream generated from fuel flowing in the fuel-supply duct into swirling combustion air flowing in the second airflow channel to produce a swirling air/fuel mixture discharged from the second airflow channel into the air/fuel transfer duct, wherein the air/fuel transfer duct is configured to provide means for conducting the straight-line air/fuel mixture discharged from the first airflow channel and the swirling air/fuel mixture discharged from the second airflow channel to a combustion chamber for combustion therein.