Propagation speed of wrinkled premixed flames within stoichiometric hydrogen-air mixtures under standard temperature and pressure

Structure of turbulent rich hydrogen-air premixed flames

“…[16][17][18][19] Wrinkling is another notable character of turbulent hydrogen-contained premixed flames' structure, and it is related to both cellularity and turbulence. [20][21][22][23] Heretofore, the wrinkling level of premixed flames had been experimentally studied by many previous scholars from different viewpoints like local curvature structure, 21 fractal analysis, 24 and even spectrum analysis. 25 However, the wrinkling level had scarcely been discussed with the correlation of cellularity, and the variations of wrinkling had never been discussed removing the effects of flame's intrinsic development.…”

“…Four MFPs were mounted on the vessel in a format of Pyramid with the geometric centre located at the vessel's centre. As described in the previous literature, the porous plate split the swirl (generated by fan's rotary) into jets when the swirl past through; the jets from the 4 directions would collide with each other to form turbulence in the vessel's centre, and turbulent intensity was relevant to fan speed.…”

“…Wrinkling is another notable character of turbulent hydrogen‐contained premixed flames' structure, and it is related to both cellularity and turbulence . Heretofore, the wrinkling level of premixed flames had been experimentally studied by many previous scholars from different viewpoints like local curvature structure, fractal analysis, and even spectrum analysis .…”

Turbulent explosion characteristics of stoichiometric syngas

“…More detailed information about the generation process and generation mechanism could be found in the previous literatures. 18,19 Procedurally, the desired mixtures of syngas air were prepared in the vacuum vessel by H 2 , CO, and air upon Dalton's law of partial pressure, then the 4 MFP sets started operating for 3 minutes to form a "stable" turbulence, and the mixtures were subsequently ignited by 2 electrodes at the vessel's centre in the turbulent environment. During the explosion process, the evolution of pressure was recorded by a pressure transducer (Kistler-6052C@100 kHz, which was installed on the vessel's bottom).…”

“…The explosion experiments were performed in a 28.73-L spherical turbulent premixed explosion system, as shown in Figure 1. 18,19 Procedurally, the desired mixtures of syngas air were prepared in the vacuum vessel by H 2 , CO, and air upon Dalton's law of partial pressure, then the 4 MFP sets started operating for 3 minutes to form a "stable" turbulence, and the mixtures were subsequently ignited by 2 electrodes at the vessel's centre in the turbulent environment. Each MFP set consists one electric motor, one magnetic coupling, one axial fan, and one porous plate, as demonstrated in Figure 1.…”