Measurement on instantaneous flame front structure of turbulent premixed CH4/H2/air flames
作者： Meng Zhang , Jinhua Wang , Yongliang Xie , Zhilong Wei , Wu Jin
DOI: 10.1016/J.EXPTHERMFLUSCI.2013.10.002
关键词:
摘要: Abstract Instantaneous flame front structure of turbulent premixed CH 4 /H 2 /air flames (hydrogen fraction 0%, 5%, 10% and 20% by mole fraction) was investigated quantitatively using a nozzle-type Bunsen burner. Hot wire anemometer OH-PLIF were used to measure the flow detect instantaneous structure, respectively. Turbulent burning velocity, S T , surface density, Σ mean volume, V f calculated processing images. Results show that structures are wrinkled it becomes much finer with increase turbulence intensity as well hydrogen fraction. The value /S L significantly increases u ′/ slightly Flame density profile symmetric gives its maximum at about 〈 c 〉 = 0.5. Hydrogen addition enhances tendency is more obvious under higher intensity. decrease mainly due effect volume. volume region obviously within experimental range in depth large scale wrinkles height. not predominant factor this study.
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