Basic research on numerical prediction of the ejector effect

本课题的核心问题是利用实验和数值方法对喷射器效应进行基础研究。喷射器效应是由快速的初级射流通过发展中的剪切层内的动量和能量传输交换加速周围流体而产生的。该项目的目标是更好地理解喷射器效应的基本物理现象，并通过应用最新的CFD方法阐述如何更好地捕获和预测这种效应的解决方案。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，为数值结果的验证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陈述。在研究项目结束时，应该有一个喷射器效应的一般特征和描述，并达到一个知识状态，允许CFD支持在具体技术应用中可靠地利用喷射器效应。

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.