UNS: Autoignition of Liquid Hydrocarbon Droplets in Lean, High Pressure Natural Gas Mixtures Using a Rapid Compression Machine

1510550-3月这个项目将研究如何在代表发动机内部条件的情况下点燃柴油液滴。由于非常稀薄的燃烧条件，燃料成本和污染物的形成可以比传统的柴油或火花点火发动机降低。这项研究将涉及研究生，从而为他们的研究或工程生涯做准备。提出了在代表发动机的条件下，即高压和高温下，利用快速压缩机(RCM)对柴油液滴在预混甲烷-空气混合物中的着火/燃烧进行的实验测量和化学动力学研究。这一结果将对RCCI(反应性控制压缩点火)燃烧具有指导意义，因为燃料成本和污染物形成可以比传统柴油或火花点火发动机的燃料成本和污染物生成减少。RCCI的概念涉及在每个发动机循环中燃烧两种燃料，其中一种燃料比另一种更难点燃。当环境是燃料和空气的稀薄混合物时，将首次研究真正的双燃料燃烧。拟议的研究简化了RCCI燃烧的几个步骤，将重点放在更容易着火的组分正庚烷的汽化和点火以及随后点燃主要燃料(天然气，天然气相对便宜，因此有可能降低燃料成本)的能力上。这项调查将产生亟需的RCCI燃烧数据，以帮助推动该行业的发展。

1510550 - MarcheseThis project will investigate how the Diesel fuel droplet can be ignited under conditions representative of those inside the engine. Because of the very lean combustion conditions, fuel costs and pollutant formation can be reduced from those of traditional diesel or spark ignited engines. The research will involve graduate students, thus preparing them for a research or engineering career.Experimental measurements and chemical kinetic studies are proposed on diesel droplet ignition/combustion in premixed methane-air mixture using a rapid compression machine (RCM) at conditions representative of those of engines, i.e., high pressures and high temperatures. The result will have implication for RCCI (reactivity controlled compression ignition) combustion in that fuel costs and pollutant formation can be reduced from those of traditional diesel or spark ignited engines. The RCCI concept involves combustion of two fuels in each engine cycle, in which one fuel is more difficult to ignite than the other. The true dual fuel combustion where the ambient is a lean mixture of fuel-air will be studied for the first time. The proposed study simplifies several of the steps in RCCI combustion to focus attention on the vaporization and ignition of the more easily ignited component, n-heptane in this proposed study, and its subsequent ability to ignite the main fuel (natural gas, which is relatively cheap, and thus the potential to reduce fuel costs). The investigation will yield much needed RCCI combustion data to help advance the industry.