High-Frequency Transverse Acoustic Coupling in a Multiple-Injector Cryogenic Combustor

Large eddy simulations of multiple transcritical coaxial flames submitted to a high-frequency transverse acoustic modulation

“…A Multiple-Injector Combustor (MIC), featuring five injectors representative of a LRE injection plane system, was conceived [22,23], and operated on the Mascotte facility of ONERA.…”

Dynamics of a transcritical coaxial flame under a high-frequency transverse acoustic forcing: Influence of the modulation frequency on the flame response

“…As the most destructive instabilities in LREs involve transverse resonant modes of the thrust chamber, many experimental studies were performed on non-reacting [27][28][29][30][31][32][33][34][35] and reacting flows [36][37][38][39][40] submitted to transverse acoustic modulations. They showed a reduction of the jet length, indicating altered destabilization and mixing processes, a growth of the expansion angle and a flame oscillation following the acoustic field.…”

LES Study of Transverse Acoustic Instabilities in a Swirled Kerosene/Air Combustion Chamber

“…But there are other examples [16] where these modes (which have higher frequencies than longitudinal oscillations) have been identified in the main chamber of gas turbines and where the physics of this instability remains mysterious. Transverse acoustic waves interacting with flames have been studied experimentally and numerically since 2009 [17][18][19][20] in forced configurations. The objective of the present work is to study self-excited transverse modes in a square laboratory combustion chamber using LES and an acoustic solver.…”