Experimental and numerical analysis of spray-film-interaction for thin wall-films

薄壁薄膜喷膜相互作用的实验和数值分析

• 批准号: 280662579
• 负责人: Professor Dr.-Ing. Reinhold Kneer
• 金额: --
• 依托单位: Lehrstuhl für Wärme- und Stoffübertragung (WSA)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/280662579?language=en
• 关键词: Experimental; numerical; analysis; spray; film

The interaction of high-density sprays with thin wall-films is of technical relevance for IC engine applications. Scientific literature offers a large number of investigations on single-droplet/wall-film-interaction, which have led to the development of various models describing the outcome of the interaction process. Own studies on spray/wallfilm-interaction suggest that for high-density sprays single-droplet-effects are of minor importance. Instead, droplet swarming (including droplet collisions and simultaneous impact of a multitude of droplets) and jet impingement (including jet deflection and wall-shear-stresses) dominate liquid deposition and removal. In the given proposal, the influence of swarming and shear stress will be quantified by experimental and numerical methods, applying a state-of-the-art numerical spray model, a generic experimental setup, and laser-based optical measurement techniques.

高密度喷雾与薄壁薄膜的相互作用对于内燃机应用具有技术相关性。科学文献提供了大量关于单液滴/壁膜相互作用的研究，这导致了描述相互作用过程结果的各种模型的发展。自己对喷雾/壁膜相互作用的研究表明，对于高密度喷雾，单液滴效应并不重要。相反，液滴群（包括液滴碰撞和大量液滴的同时冲击）和射流冲击（包括射流偏转和壁剪切应力）主导液体沉积和去除。在给定的提案中，蜂群和剪切应力的影响将通过实验和数值方法进行量化，应用最先进的数值喷雾模型、通用实验装置和基于激光的光学测量技术。