Fig. 14. Colored contours of ?local-? (departure from the incoming mixture equivalence ratio) with overlaid mass fraction level lines of H radical (black line) near the flame-anchoring location of the quartz combustor. (For interpretation of the references to colour in this AG 1879 figure legend, the reader is referred to the web version of this article.)Figure optionsDownload full-size imageDownload as PowerPoint slide
For more information, we depict the local equivalence ratio, flow velocity level lines and gas temperature profiles in the transversal direction (1 mm ? y ? 4 mm) at different axial distances (i.e., x = 3.5, 4.0, 4.5, 5.0 and 5.5 mm) in Fig. 15. It can also be observed from bud sports figure that ?local decreases just before the flame front, and increases sharply in the low velocity zone and reaches the maximum value at the bottom of cavity (y = 4 mm). This is because that the existence of cavity can enhance the two-dimensionality of flow field, which contributes to the formation of high local-equivalence-ratio zone. In addition, a sharp velocity gradient can also promote the preferential transport effect .