摘要：The improved delayed detached eddy simulation method with shear stress transport model was used to analyze the evolution of vortex structure, velocity and pressure fields of swirling jet. The influence of nozzle pressure drop on vortex structure development and turbulence pulsation was investigated. The development of vortex structure could be divided into three stages: Kelvin-Helmholtz (K-H) instability, transition stage and swirling flow instability. Swirling flow could significantly enhance radial turbulence pulsation and increase diffusion angle. At the downstream of the jet flow, turbulence pulsation dis-sipation was the main reason for jet velocity attenuation. With the increase of pressure drop, the jet velocity, pulsation ampli-tude and the symmetry of velocity distribution increased correspondingly. Meanwhile the pressure pulsation along with the axis and vortex transport intensity also increased significantly. When the jet distance exceeded about 9 times the dimensionless jet distance, the impact distance of swirling jet could not be improved effectively by increasing the pressure drop. However, it could effectively increase the swirl intensity and jet diffusion angle. The swirling jet is more suitable for radial horizontal drilling with large hole size, coalbed methane horizontal well cavity completion and roadway drilling and pressure relief, etc.

关键字：swirling jet; flow field structure; detached eddy; vortex evolution; turbulence pulsation; jet velocity; jet diffusion angle

ISSN号：2096-4803

卷、期、页：卷49期4: 929-941

发表日期：2022-08-01

影响因子：0.000000

收录情况：SCI（科学引文索引印刷版）,地学领域高质量科技期刊分级目录（国内T1）,北大中文核心期刊,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：Petroleum Exploration and Development

通讯作者：陈健翔,秦小舟

第一作者：杨睿月,黄中伟,李根生,李敬彬,武晓光

论文类型：期刊论文

论文概要：陈健翔,杨睿月,黄中伟,李根生,秦小舟,李敬彬,武晓光，Detached eddy simulation on the structure of swirling jet flow field，Petroleum Exploration and Development，2022，卷49期4: 929-941

论文题目：Detached eddy simulation on the structure of swirling jet flow field