涡旋射流控制逆压梯度平板边界层分离的涡结构研究

张荻 1; 樊涛 2; 蓝吉兵 1; 谢永慧 1

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涡旋射流控制逆压梯度平板边界层分离的涡结构研究

更新时间：2025-07-09

- 涡旋射流控制逆压梯度平板边界层分离的涡结构研究
- Study on the Special Vortical Structure Development During Flow Separation Control by VGJs in Boundary Layer of Flat Plate with Adverse Pressure Gradient
- 西安交通大学学报 2012年46卷第1期页码：1-8
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
  
  : 2011-07-13. 作者简介: 张荻(1972-),女,副教授. 基金项目: 国家自然科学基金资助项目(10602044);西安交通大学基本科研业务资助项目(xjj20100127)
- DOI：
  中图分类号： TK262
- 网络首发：2012-01-10，
  
  纸质出版：2012
- 稿件说明：
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张荻 1, 樊涛 2, 蓝吉兵 1, 等. 涡旋射流控制逆压梯度平板边界层分离的涡结构研究[J]. 西安交通大学学报, 2012,46(1):1-8.

Study on the Special Vortical Structure Development During Flow Separation Control by VGJs in Boundary Layer of Flat Plate with Adverse Pressure Gradient[J]. 2012, 46(1): 1-8.
张荻 1, 樊涛 2, 蓝吉兵 1, 等. 涡旋射流控制逆压梯度平板边界层分离的涡结构研究[J]. 西安交通大学学报, 2012,46(1):1-8. DOI：

Study on the Special Vortical Structure Development During Flow Separation Control by VGJs in Boundary Layer of Flat Plate with Adverse Pressure Gradient[J]. 2012, 46(1): 1-8. DOI：

摘要

为了研究涡旋射流控制边界层分离的物理机理

设计、搭建了涡旋射流控制逆压梯度平板边界层分离实验台

在此基础上对低雷诺数下平板边界层分离及射流控制进行了实验和数值研究.通过对比不同射流控制方式的统计特性及射流控制效果

揭示了射流流场大尺度相干结构的演化规律.射流瞬时流动细节的研究表明:发卡涡和类发卡涡是逆压梯度环境下直射流和斜射流中比较典型的涡结构; 在斜射流中

随着类发卡涡的发展

射流孔下游发展成熟的类发卡涡涡腿外侧出现了不断增强的次生流向涡结构; 次生涡结构对壁面附近能量的增大和质量的输运、耗散具有重要的作用.经对比发现

斜射流控制流动分离的效果明显优于直射流.

Abstract

Experimental and numerical studies were performed at low Reynolds number using VGJs on flat plates with adverse pressure gradient to investigate the physical mechanism of flow separation control by VGJs in boundary layers. The control effects and the statistical characteristics of different control modes were analyzed to explore the development of the large-scale coherent structure. The instantaneous flow analyses show that the hairpin or hairpin-like vortices are two classical vortical structures formed from vertical and angled VGJs in adverse pressure gradient. In downstream of angled VGJs

the additional flow structures are generated as a consequence of the hairpin-like vortices. Its formation could increase the transport of energy and mass

and then improve the dissipation effectively. In addition

the angled VGJs provides more effective separation control than the vertical VGJs.

关键词

Keywords

references

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