Investigation of mass transfer in a system of impinging jets with focus on homogeneity

研究冲击射流系统中的质量传递，重点关注均匀性

• 批准号: 230617660
• 负责人: Professor Dr.-Ing. Wilhelm Schabel
• 金额: --
• 依托单位: Bereich Thin Film Technology
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/230617660?language=en
• 关键词: Investigation; mass; transfer; system; impinging

In case of coatings applied over the liquid phase, homogeneous mass transfer boundary conditions play an important role in the process of morphology and surface structure. Configurations of impinging jets widely used to set the boundary conditions within the gas phase result in a highly inhomogeneous distribution of the mass transfer coefficient. To determine the local and area averaged mass transfer coefficient in systems of impinging jets, literature offers correlations considering technical relevant parameters to give advice for adjusting the system to the field of application. However, in terms of homogeneity and intensity of the heat and mass transfer coefficients, literature lacks recommendations for the optimal design parameters. The goal of the presented research project is, using experimental and numerical methods, to figure out the fundamental relations for new configurations of impinging jets, especially for systems with effusion of the spent fluid over the orifice plate. The hypothesis contains that by effusion holes in the orifice plate of an array of confined impinging jets the homogeneity of the distribution of heat and mass transfer coefficients can be increased and by variation of the in- and outlet conditions regulated time-dependently.

在液相上施加涂层的情况下，均匀的传质边界条件在形态和表面结构的过程中起着重要的作用。在气相中广泛使用的冲击射流的边界条件的设置在一个高度不均匀的分布的传质系数的结果。为了确定冲击射流系统中的局部和面积平均传质系数，文献提供了考虑技术相关参数的关联式，以给出调整系统以应用于该领域的建议。然而，在均匀性和强度的传热和传质系数，文献缺乏最佳的设计参数的建议。提出的研究项目的目标是，使用实验和数值方法，找出新的配置的冲击射流，特别是用过的流体在孔板渗出系统的基本关系。该假设包含，通过在孔板中的一个阵列的受限的冲击射流的传热和传质系数的分布的均匀性可以增加，并通过变化的输入和输出条件的调节时间依赖性的流出孔。

项目成果

Untersuchung der Verteilung des Wärmeübergangskoeffizienten in Prallstrahlsystemen mit lokaler Absaugung

局部提取冲击射流系统传热系数分布的研究

• DOI: 10.1002/cite.201450383
• 发表时间: 2014
• 期刊: Chemie Ingenieur Technik
• 影响因子: 1.9
• 作者: P. Cavadini;P. Scharfer;W. Schabel
• 通讯作者: W. Schabel

Local heat transfer characteristics of a slot nozzle array for batch drying of thin films under industrial process conditions

工业工艺条件下薄膜批量干燥狭缝喷嘴阵列的局部传热特性

• DOI: 10.1007/s11998-015-9712-1
• 发表时间: 2015
• 期刊: Journal of Coatings Technology and Research
• 影响因子: 2.3
• 作者: Baunach;Jaiser;Cavadini;Scharfer;Schabel
• 通讯作者: Schabel