Numerical studies on flame structure of two interactive droplets in spray

Wei Hsin Chen, Jenn Long Liu

研究成果: Paper同行評審

摘要

The vaporization characteristics and flame structures of two equal-sized interactive droplets in reactive flows are investigated by means of a body-fitted computation. By fixing the Reynolds number and droplet spacing, and varying the ambient temperature as well as equivalence ratio, the numerical results illustrate that, with increasing the ambient temperature, the flame exhibits the wake flame, transition flame, and envelope flame sequentially. For the wake or transition flame, a triple-flame structure develops. However, a double-flame is established when the envelope flame forms. On the other hand, the influence of increasing the ambient equivalence ratio on the vaporization rate and flame just as the ambient temperature increases. It was found that the droplet combustion will be initiated earlier in the presence of reactive environment, while the flame moves upstream. As the ambient equivalence ratio is as high as 0.2, the effect of ambient fuel vapor becomes significant and the fuel-lean premixed flame can extends to the far-field. In general, the vaporization rate of the trailing droplet is lower than that of the leading one. However, an inverse behavior on vaporization appears as the transition flame takes place.

原文English
DOIs
出版狀態Published - 1999
事件37th Aerospace Sciences Meeting and Exhibit, 1999 - Reno, United States
持續時間: 1999 1月 111999 1月 14

Other

Other37th Aerospace Sciences Meeting and Exhibit, 1999
國家/地區United States
城市Reno
期間99-01-1199-01-14

All Science Journal Classification (ASJC) codes

  • 空間與行星科學
  • 航空工程

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