کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1278591 | 1497560 | 2012 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Flame structure and global flame response to the equivalence ratios of interacting partially premixed methane and hydrogen flames Flame structure and global flame response to the equivalence ratios of interacting partially premixed methane and hydrogen flames](/preview/png/1278591.png)
The interacting partially premixed methane and hydrogen flames established in a one-dimensional counterflow field were investigated numerically with the OPPDIF code and GRI-v3.0 was used to consider both fuels. The flame structure and response of the maximum flame temperature, heat-release rate, and flame speed to the equivalence ratios (Φ) and global strain rate (ag) were investigated. The maximum temperature decreased with increasing ag. The maximum temperature for cases with a stoichiometric hydrogen-side flame was higher than for other cases with the same ag.The hydrogen-side flame played a key role in determining the maximum temperature. The maximum heat-release rates (MHRRs) for all cases show different trends. The MHRR of the methane-side flame was affected considerably by the interacting flame structure and hydrogen-side flame condition. However, the MHRRs of the hydrogen were independent of methane-side flame condition. For the cases where Φ of the methane-side flame was varied while the hydrogen-side flame was kept stoichiometric (Var-S), the MHRR and flame speed of the hydrogen-side flame were independent of the methane-side flame conditions. However, the methane-side flames had a negative flame speed except near-stoichiometric conditions. On the other hand, in the cases where Φ of the hydrogen-side flame was varied while the methane-side flame was kept stoichiometric (S-Var), the hydrogen-side flames had the MHRR and flame speed similar to those of an unstretched partially premixed hydrogen flame.
► Interacting partially premixed methane and hydrogen flames was investigated.
► Counterflow configuration was adopted to establish the interacting flames.
► Flame structures and global behavior of the interacting flames were examined.
► Contributions of each term in the energy and species equations were analyzed.
► Important elementary chemical kinetics in the flames was analyzed.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 9, May 2012, Pages 7877–7888