科研之友
微信
新浪微博
Facebook
分享链接
摘要
Hydrogen enhanced combustion of JP-8 provides an additional control parameter for external combustion based power sources. When supplied as part of a "reformer gas" mixture, hydrogen provides similar benefits as pure hydrogen, given sufficient oxygen mixing. Previous work showed benefits of hydrogen enhanced combustion for external combustion based power sources. As a step closer to practical applications, the present work examines the use of hydrogen rich reformate. This mixture of hydrogen, carbon monoxide, carbon dioxide, and nitrogen is produced by fuel reforming of JP-8 and other logistics fuels. Tests evaluated the temperature profiles of dual fueled flames using JP-8 and either hydrogen or a bottled mixture representing fuel reformate. Both supplemental fuels move combustion earlier, allowing more stable combustion and potential for reduced size. JP-8 flow rate was reduced to maintain fuel energy input at a constant 5.5 kWth. In comparing two cases, the important factor was the total energy contribution. The ratio of hydrogen and carbon monoxide had little effect on the flame structure. This research also compared methods of hydrogen addition. It was added with either the atomizing air or the secondary air which reiterated the importance of oxygen availability. For example, hydrogen through the nozzle produces additional changes to the flame structure due to the combustible mixture of hydrogen and air in the nozzle. The equivalent flow rate of reformate in the nozzle does not produce the same effect because the air in the nozzle is replaced by the other gases in the reformate (CO, CO2, and N-2). Hydrogen enrichment tests establish the benefit of dual firing hydrogen and JP-8. These reformate tests show the variables that must be considered in implementing this technique in a practical system.
- 出版日期2017-12-15
