Experimental Investigation of an Atmospheric Rectangular Rich Quench Lean Combustor Sector for Aeroengines

Abstract

In this research work the potential of rich quench lean combustion for low emission aeroengines is investigated in a rectangular atmospheric sector, representing a segment of an annular combustor. For a constant design point (cruise) the mixing process and the NO, formation are studied in detail by concentration, temperature and velocity measurements using intrusive and non-intrusive measuring techniques.Measurements at the exit of the homogeneous primary zone show relatively high levels of non-thermal NO. The NO, formation in the quench zone is very low due to the quick mixing of the secondary air achieved by an adequate penetration of the secondary air jets and a high turbulence level. The NO and CO emissions at the combustor exit are low and the pattern factor of the temperature distribution is sufficient.

Experimental and Numerical Studies of NOx Formation in Two-Stage Methane-Air Flames

“…Staged combustion is a well-established, practical method for reducing emissions of oxides of nitrogen (NO.) from gas turbine combustors [1][2][3][4]. Addition of inerts, such as H2O and CO2, for example through burnt-gas recirculation, also can be beneficial for this purpose.…”

Emission Characteristics Through Rich–Lean Combustor Development Process for Small Aircraft Engine

“…One is enhanced mixing in the primary combustion region, and the other is tuning of the air mass flow ratio among the fuel nozzle, the primary and secondary combustion regions, and the wall cooling. Much research has been performed on these factors, both in the literature [8][9][10][11][12][13][14] and in the development process for our combustor.…”

“…Each aspect of EINOx corresponding to the similarities described above is shown in Figs. 7,9,12, and 17, surrounded by ovals consisting of red dots for the opposing type and by green dashes for the staggered type. As mentioned before, full annular combustors had staggered-type combustion air-hole allocation, so that only the green dashed oval is shown in Fig.…”

Experimental Study on Combustion Characteristics of a Swirl-stabilized Conical Burner

“…가스터빈 연소기에서 유해 배출물을 저감하기 위 한 기술은 크게 희박연소(lean burn) 방식, 과농 희박연 소(quick quench lean burn) 방식, 촉매 연소(catalytic combustion) 적용방식 등이 있다 [5][6][7][8].…”