Ejector-Enhanced, Pulsed, Pressure-Gain Combustor

TBMG-5182

05/01/2009

Abstract
Content

An experimental combination of an off-the-shelf valved pulsejet combustor and an aerodynamically optimized ejector has shown promise as a prototype of improved combustors for gas turbine engines. Despite their name, the “constant pressure” combustors heretofore used in gas turbine engines exhibit typical pressure losses ranging from 4 to 8 percent of the total pressures delivered by upstream compressors. In contrast, the present ejector-enhanced pulsejet combustor exhibits a pressure rise of about 3.5 percent at overall enthalpy and temperature ratios compatible with those of modern turbomachines. The modest pressure rise translates to a comparable increase in overall engine efficiency and, consequently, a comparable decrease in specific fuel consumption. The ejector-enhanced pulsejet combustor may also offer potential for reducing the emission of harmful exhaust compounds by making it practical to employ a low-loss rich-burn/quench/lean-burn sequence.

Meta TagsDetails
Citation
"Ejector-Enhanced, Pulsed, Pressure-Gain Combustor," Mobility Engineering, May 1, 2009.
Additional Details
Publisher
Published
May 1, 2009
Product Code
TBMG-5182
Content Type
Magazine Article
Language
English