Reactive Supersonic Diesel Jets under Extreme High Injection Pressure

建议：1402595 PI：方铁刚头衔：极高喷射压力下的反应式超音速柴油射流高速（超音速）液体射流在推进和发电工程中有着广泛的应用，如柴油发动机。在超音速条件下，激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。北卡罗来纳州州立大学的研究小组提议在高达1,000 MPa的极高喷射压力下研究超音速柴油喷气机。在十八个月的项目期间的目标是利用液体渗透过程中诱导的冲击波，并证明其对增强喷雾雾化和燃烧的影响。该项目还为整合研究和教育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压下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。本项目收集的知识将通过讲习班、国家和国际会议介绍和档案期刊出版物向公众传播。此外，收集到的知识将被传递给下一代高效清洁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，但尚未进行过研究。该项目的结果将推进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。这种现象在压燃式发动机中的成功应用将导致发动机设计的突破，从而显著降低燃料消耗和污染物排放。超出燃油喷射系统的另一个深远影响是，该项目预计将促进对新型高压双内高压成形技术中应用的流固相互作用的理解。该技术用于制造汽车和航空航天应用的复杂管状部件。具体的任务包括调查液体渗透，破碎，并与诱导的冲击波的相互作用，并调查冲击波对燃料喷雾雾化和燃烧的影响。这种现象在压燃式发动机中的成功应用将导致发动机设计的突破，从而大大降低燃料消耗，从而减少我们对外国石油的依赖并减少污染物排放。

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.