Basic research on numerical prediction of the ejector effect

喷射效应数值预测基础研究

• 批准号: 224649199
• 负责人: Professor Dr.-Ing. Reinhard Niehuis
• 金额: --
• 依托单位: Institut für Strahlantriebe (LRT-12)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/224649199?language=en
• 关键词: Basic; research; numerical; prediction; ejector

Core issue of this project is basic research on the ejector effect, present in numerous applications, by means of experimental and numerical methods. The ejector effect is generated by a fast primary jet flow accelerating surrounding fluid by momentum and energy transport exchange within the developing shear layer. It is the objective of this project to gain a better understanding of the basic physical phenomena of the ejector effect and elaborate solutions how to better capture and predict this effect by applying latest CFD methods. This includes consideration and assessment of various approaches for the proper treatment of the encountered turbulence phenomena.The intended work scope includes the creation of a meaningful test case providing comprehensive experimental data for validation purposes of numerical results. Extensive numerical studies will be carried out aiming at an assessment and improvement of the quantitative prediction capabilities of state of the art CFD methods and statements on the most important parameters influencing the ejector effect. At the end of the research project, a general characterization and description of the ejector effect should exist and a state of knowledge be achieved which allows for a CFD supported reliable utilization of the ejector effect in concrete technical applications.

该项目的核心问题是通过实验和数值方法对存在于众多应用中的喷射器效应进行基础研究。喷射器效应是由快速的主射流通过发展中剪切层内的动量和能量传输交换加速周围流体而产生的。本项目的目标是更好地了解喷射器效应的基本物理现象，并详细说明如何通过应用最新的CFD方法更好地捕获和预测这种效应。这包括考虑和评估适当处理遇到的湍流现象的各种方法。预期的工作范围包括创建一个有意义的测试用例，为验证数值结果提供全面的实验数据。将进行广泛的数值研究，旨在评估和改进最先进的CFD方法的定量预测能力，并对影响喷射器效果的最重要参数进行说明。在研究项目结束时，应存在喷射器效应的一般表征和描述，并实现允许CFD支持的喷射器效应在具体技术应用中的可靠利用的知识状态。