Axial Vortices in Gaseous-Fueled Burner Flowfields. Annual Report (Period Ending April 1989)

摘要

The United Technologies Research Center is conducting a program to investigate a novel mixing concept which if applied to heat exchangers appears to offer the promise of significantly enhanced convective heat transfer rates, and if applied to gas-fueled burners, would promote rapid, low-pressure loss mixing of fuel and air, and maintenance of uniform combustion gas temperature profiles. The program comprises two principal Tasks. The first Task involves an investigation of the use of these vortices in heat exchangers to scrub away the insulating thermal boundary layer that impedes the transfer of heat. The second Task involves an investigation of the use of these vortices in the burner proper to enhance (1) the ejector action (fuel flow pumping airflow) in the entrance section of the burner, (2) the rate and extent to which the fuel and air are mixed, and (3) the extent to which the temperature profile may be controlled in the combustion and post combustion zones.