Combustor–turbine interactions are investigated by modeling the unsteady flowfields inside a realistic combustor and high-pressure turbine configuration from the Energy Efficient Engine program. We perform three-dimensional unsteady simulations to capture a liquid-spray fuel/air combustion and relative motions between the combustor and turbine using the Open National Combustion Code. To understand combustor–turbine interactions, we perform both sequential single-component simulations (step 1: stator of turbine; step 2: the turbine imposing the time-averaged flow solution from step 1 as the inflow) and a fully coupled combustor–turbine simulation (step 3) at two operating conditions: the simulated sea-level takeoff (SLTO) condition () and a more realistic SLTO (). Although the mean flowfields inside the combustor predicted by steps 1 and 3 are similar, there is a noticeable difference in the hot-streak distributions at the first-stage stator. In addition, the shock wave appears at the first-stage stator only for steps 2 and 3 for the low-pressure condition and for step 3 for the high-pressure condition. The calculated turbine efficiencies from step 2 and step 3 differ by about 7%. From both conditions, it is consistently observed that fully coupling the combustor and turbine enhances temporal oscillations of the turbine efficiency through the temperature fluctuations generated in the combustor.
Computational Study on Fully Coupled Combustor–Turbine Interactions
Journal of Propulsion and Power ; 39 , 4 ; 540-553
2022-12-30
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Computational Study of Combustor–Turbine Interactions
AIAA | 2018
|Computational Study of Combustor-Turbine Interactions
AIAA | 2017
|