Reactive Supersonic Diesel Jets under Extreme High Injection Pressure

建议：1402595 PI：方，铁钢标题：极高喷射压力下的反应式超音速柴油喷嘴高速(超音速)液体喷嘴在工程上有广泛的应用，用于推进和发电，如柴油发动机。在超音速条件下，冲击波可以在液体射流或雾化喷雾周围形成，导致燃料混合和燃烧的显著增强。北卡罗来纳州立大学的研究小组计划研究一种超音速柴油喷气发动机，喷油压力最高可达1000兆帕。在为期18个月的项目期间，目标是利用液体渗透过程中产生的冲击波，并展示它们对强化喷雾雾化和燃烧的影响。该项目也为研究和教育的结合提供了一个极好的机会。参与该项目的研究生和本科生将获得与极端压力下的点火和燃料雾化相关的实验和分析技能。该项目提供的经验将丰富PI在当前机械工程课程中教授的三门课程。在该项目中收集的知识将通过讲习班、国家和国际会议介绍以及档案期刊出版物向公众传播。此外，收集到的知识将被传达给高效和清洁的下一代内燃机的设计者和开发者。这是一个新的领域，尽管在柴油发动机中有潜在的应用，但这是一个尚未被研究的领域。该项目的成果将推动并提供有关燃油输送系统中极高喷射压力应用的新知识基础。这一现象在压燃式发动机上的成功应用将导致发动机设计的突破，从而大幅降低燃油消耗和污染物排放。燃油喷射系统之外的另一个深远影响是，该项目有望促进对应用于新型高压双液压成形技术的流固相互作用的理解。这项技术用于制造汽车和航空航天应用的复杂管状零件。具体任务包括研究液体的穿透、破碎和与诱导冲击波的相互作用，以及研究冲击波对燃油雾化和燃烧的影响。将这一现象成功地应用于压燃式发动机，将使发动机设计取得突破，大幅降低燃油消耗，从而减少我们对外国石油的依赖，减少污染物排放。

Proposal: 1402595PI: Fang, TiegangTitle: Reactive Supersonic Diesel Jets under Extreme High Injection PressureHigh-speed (supersonic) liquid jets have wide applications in engineering for propulsion and power generation, such as diesel engines. Under supersonic conditions, shock waves can form around liquid jets or atomized sprays, leading to significant enhancement in fuel mixing and combustion. The North Carolina State University research team proposes to study a supersonic diesel jet under extreme high injection pressures of up to 1,000 MPa. The goals over the eighteen-month project period are to exploit the induced shock waves during liquid penetration and to demonstrate their effects on enhanced spray atomization and combustion. This project also provides an excellent opportunity for integrating research and education. The graduate and undergraduate students involved in this project will acquire experimental and analytical skills related to ignition and fuel atomization at extreme pressures. The experience provided by this project will enrich three courses that the PI teaches in the current mechanical engineering curriculum. The knowledge gathered in this project will be disseminated to the public via workshops, national and international conferences presentations, and archival journal publications. In addition, the gathered knowledge will be relayed to designers and developers of highly efficient and clean next-generation internal combustion engines.This is a novel area that has not been studied despite potential application in diesel engines. Results from this project will advance and provide a new knowledge base pertaining to the applications of extreme high injection pressures in the fuel delivery systems. Successful application of this phenomenon in compression-ignition engines will lead to breakthroughs in engine design, allowing significant reductions in fuel consumption and pollutant emissions. Another profound impact that is beyond the fuel injection system is that this project is expected to advance understanding of fluid-solid interaction as applied in novel high-pressure dual hydroforming technique. This technique is used for making complex tubular parts for automotive and aerospace applications. Specific tasks include investigating the liquid penetration, breakup, and interaction with the induced shock waves and to investigate the influence of shock waves on fuel spray atomization and combustion. Successful application of this phenomenon in compression-ignition engines will lead to breakthroughs in engine design, allowing significant reductions in fuel consumption, thereby diminishing our dependence on foreign oil and reducing pollutant emissions.