Numerical simulation of pulsation impinging jet arrays II (B04)

脉动冲击射流阵列数值模拟II（B04）

• 批准号: 223985629
• 金额: --
• 依托单位: Lehrstuhl für Technische Mechanik und Strömungsmechanik
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/223985629?language=en
• 关键词: Numerical; simulation; pulsation; impinging; jet

A pulsating impinging jet has substantially higher heat transfer than a non pulsating jet. The extra heat transfer comes from a vortex system impinging on the plate. This vortex system was shown to be related to the eigenmodes of the jet but it is unclear how it behaves under cross flow and curvature like in the realistic case in the turbine blade. On top of that it is not the linear eigenmode rather than a saturated limit cycle which is of interest. We investigate this limit cycle and its receptivity in order to optimize saturation. The interaction of several jets under cross flow and curvature is investigated numerically for a line array.

与非脉动射流相比，脉动撞击射流的热传递要高得多。额外的热传递来自冲击板上的涡流系统。该涡流系统被证明与射流的本征码有关，但目前尚不清楚它在交叉流和曲率下的行为，例如在涡轮刀片中现实的情况下。最重要的是不是线性本本特征模式而不是饱和极限循环。我们研究了此极限周期及其接受度，以优化饱和度。对于线阵列，研究了横流和曲率下的几种喷气机的相互作用。