首页> 外文会议>Proceedings of the 2009 spring technical conference of the ASME Internal Combustion Engine Division >THE INFLUENCE OF ELLIPTICAL NOZZLE HOLES ON IGNITION AND COMBUSTION OF TRANSIENT NATURAL GAS JETS
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THE INFLUENCE OF ELLIPTICAL NOZZLE HOLES ON IGNITION AND COMBUSTION OF TRANSIENT NATURAL GAS JETS

机译:椭圆形喷嘴孔对瞬态天然气喷嘴点火和燃烧的影响

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摘要

Experiments were conducted to compare the mixing and combustion properties of natural gas jets issuing from elliptical and round nozzle holes within an optically accessible combustion bomb. High speed images of combustion events were captured and analyzed along with cylinder pressure and heat release data. Hydrocarbon measurements of the combustion products were used to calculate combustion efficiencies. The elliptical nozzle holes were found to produce a more evenly distributed heat release profile, with a smoother transition from premixed to diffusion burning. The elliptical nozzle jets also produced far more luminous flames. Ignition delay and combustion efficiency were not found to vary significantly with nozzle design. The use of elliptical nozzles as a method of mixing enhancement for gaseous engine fuels remains potentially viable, although further work is necessary to fully quantify the performance and emissions impacts.
机译:进行了实验,以比较从光学可接近的燃烧弹内的椭圆形和圆形喷嘴孔发出的天然气射流的混合和燃烧特性。捕获燃烧事件的高速图像,并与气缸压力和放热数据一起进行分析。使用燃烧产物的碳氢化合物测量值来计算燃烧效率。发现椭圆形喷嘴孔可产生更均匀分布的放热曲线,从预混燃烧到扩散燃烧的过渡更为平滑。椭圆形喷嘴也产生了更多的发光火焰。没有发现点火延迟和燃烧效率随喷嘴设计而有显着变化。尽管需要进一步开展工作以充分量化性能和排放影响,但将椭圆形喷嘴用作混合气态发动机燃料的方法仍然可能可行。

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