Study of Flow and Mixing in a Generic GT Combustor Using LES

Abstract

While the basic capability of large eddy simulation (LES) has been amply demonstrated on a number of relatively simple academic configurations, there is still a lack of works applying LES to practical systems also performing detailed quantitative comparisons based on experimental data. In this paper, we tend to approach the simulation of real gas turbine combustor step by step as we first present results of the isothermal LES of a generic gas turbine combustor rig. The available detailed measurements are used to thoroughly validate the LES results. Beyond a pure validation, the LES is used to analyze the influence of the precessing vortex core present in the studied configuration on the mixing of fuel and oxidizer, and possible implications for reacting conditions are discussed.

Large eddy simulation of a partially-premixed gas turbine model combustor

“…The burner was operated at elevated pressure conditions and with preheated air. LES-computations of this configuration have been performed [13,14]. Although these model assessments were limited to comparisons of the velocity field for reacting operating conditions, these simulations provided valuable information about the flow-field structure and the assessment of modeling strategies.…”

Mixing analysis of a swirling recirculating flow using DNS and experimental data

“…As Wegner et al (2005) pointed out, investigating a similar type of flow, the instantaneous or phase averaged concentration of the scalar field exhibits large differences to the mean scalar concentration, especially in regions where the fluid recirculates. A similar behavior was found in the DNS results.…”

Detached eddy simulation of non-reacting swirling flow in a vortex burner

“…Numerous experimental [11][12][13][14][15] and numerical [16][17][18][19] studies were investigated swirling flows features at an isothermal condition. Ceglia et al [20] studied experimentally the three-dimensional flow field of a turbulent swirling jet in a model aero engine burn injector.…”