Direct and indirect measurements of flame surface density, orientation, and curvature for premixed turbulent combustion modeling in a cruciform burner

Effects of H2 or CO2 addition, equivalence ratio, and turbulent straining on turbulent burning velocities for lean premixed methane combustion

“…This novel experimental design allows flame-turbulence interaction to occur without influence by ignition and unwanted turbulence from walls. Consequently, various measuring techniques, such as high-speed laser tomography, ion-probe sensors, laser Doppler velocimetry (LDV), and particle imaging velocimetry (PIV), can be directly employed in the burner for establishing quantitative analyses of turbulent burning velocities, wrinkled flame front statistics, and flame global quenching [17,[21][22][23][24][25][26][27][28]. This novel configuration is a useful contribution to the study of [18,21,22].…”

Estimates of the three-dimensional flame surface density and every term in its transport equation from two-dimensional measurements

“…However, because of the difficulty of performing three-dimensional (3D) measurements, the vast majority of these studies were performed in two spatial dimensions. Studies that report two-dimensional (2D) measurements of the FSD include [7,8,10,[18][19][20][21][22][23][24][25]. Measurements of curvature in 2D have been reported by Refs.…”

A transition on minimum ignition energy for lean turbulent methane combustion in flamelet and distributed regimes

“…1), the effect of turbulent straining on MIE is investigated for the first time in intense isotropic turbulence with negligible mean velocities. This novel experimental apparatus has been used to obtain qualitative understanding and quantitative analysis of various aspects of turbulent flame propagation, stretching, and global quenching with and/or without consideration of radiation heat losses [15][16][17][18][19]. The following section reviews experimental methods used in this work, including new modifications of the burner, the ignition system, the determination of MIE using high voltage and current probes, the imaging acquisition system, and the experimental procedure.…”