Thermoacoustic Instability Experimental Dataset for Fuel-Flexible Combustion Systems

Thermoacoustic instabilities pose a significant challenge in the design and operation of combustion systems. Addressing this challenge is becoming even more critical with the development of fuel-flexible combustors capable of operating with hydrogen and other sustainable fuel sources. To support research aimed at addressing these issues, we present a comprehensive experimental dataset characterizing thermoacoustic instability behavior across a wide range of operating conditions. The dataset includes systematic variations in equivalence ratio (ranging from 0.5 to 1.0), hydrogen content (0\% to 80\%), and combustor length (230 mm and 305 mm). These parameters are the key parameters controlling the onset and dynamics of combustion instabilities. For each operating condition, time-resolved pressure and heat release rate measurements are provided, enabling in-depth analysis of acoustic response, flame dynamics, and instability regimes. This open-access dataset is intended to support the thermoacoustic research community in developing and validating predictive models, control strategies, and machine learning approaches for instability mitigation.