Destructive thermoacoustic instabilities may potentially slow down significantly the ongoing
development of hydrogen combustors for decarbonizing aviation. Their early prediction …

We report the development of a multi-pass diode laser absorption spectroscopy system for
simultaneous measurements of soot volume fraction (SVF), temperature, and C_2H_2 …

The combustion regime transition in a sequential burner (SB) supplied with H 2 (48 kW) is
experimentally studied during steady and transient operation. The test rig is a simplified …

Abstract A high-frequency (1.5 kHz) spontaneous Raman spectroscopy measurement
technique is developed and applied to measure external fluctuations generated in the local …

Entropy waves are generated in many technically relevant flow processes such as
combustion, mixing, or convective heat transfer. When accelerated, entropy waves generate …

This investigation presents novel adaptive control algorithms specifically designed to
address and mitigate thermoacoustic instabilities. Gas turbines are limited in their …

Thermoacoustic combustion instability is a major concern in gas turbine combustors with
hydrogen-enriched fuels. Unsteady combustion not only generates acoustic waves but it …

This paper presents a novel gas concentration detection approach based on wavelength
modulation spectroscopy and linear convolution (LC-WMS). The linear convolution is first …

Unsteady combustion generates not only acoustic waves, but also fluctuations of the burnt
gas temperature—referred to as entropy waves. These waves are convected by the mean …

The flame transfer function (FTF) relates acoustic perturbations and the coherent heat
release rate response. This frequency-dependent function governs the thermoacoustic …