Fig. 5
From: Characterizing hydrogen-fuelled pulsating combustion on thermodynamic properties of a combustor
Acoustic pressure and acoustical energy variation with time. a Time evolution of the pressure fluctuations, b time evolution of the acoustical energy, as the hydrogen mass flow rate \(\dot m_{{\mathrm{H}}_2}\) is set to three different values, and the surface temperature of the heating bands is suddenly increased from 300 to 1300 K at t = 2.0 s. Mathematically, TH = 300 at t ≤ 2.0 and TH = 1300 K at 2.0 < t ≤ 4.0 s
