Stratified swirling flames are typically formed in centrally-staged combustors of modern aero
engines. The pilot flame plays an indispensable role in stabilizing the stratified swirling …

In a centrally-staged combustor, the stratified swirling flame often manifests a helical mode,
which is characterized by the emergence of helical vortices, including the precessing vortex …

Tunable diode laser absorption spectroscopy (TDLAS) with wavelength modulation
spectroscopy (WMS) has been widely applied to measure the gas temperature and species …

Combustion instabilities were investigated experimentally for a hydrogen-rich combustion in
a model afterburner installed at the end of a high-enthalpy wind tunnel. Air was supplied at …

The acceleration of entropy waves in the turbine stages of aero-engines and gas turbines
produces sound, which can contribute to the feedback mechanism of thermoacoustic …

This work investigates the dynamics of periodically-excited vortices in swirling cold flow and
hot flame using high-speed particle image velocimetry, for three different Strouhal numbers …

Acoustic liner is generally adopted to damp noise in aero-engines and gas turbines. This
paper presents a systematic study about the effects of an acoustic liner on thermoacoustic …

Moderate or intense low oxygen dilution (MILD) combustion is investigated in a co/counter-
swirl using OH∗-chemiluminescence, species measurements, OH planar laser-induced …

Predicting and controlling entropy-wave-driven combustion instabilities is challenging,
because the production, advection and dispersion of entropy waves in practical systems is …

In the present work, the combustion instability of a premixed swirl combustor was
experimentally and theoretically investigated. Results show that both intrinsic …