摘要
为了研究旋转射流钻头中叶轮结构参数对射流流场的影响及其规律,分别对叶轮导向角β、叶轮叶片数n、叶轮长度L0进行了数值模拟。结果表明,当叶轮导向角β为50~60°、叶轮叶片数n为4、叶轮长度L0为20~25mm时,叶轮对流体加旋效果和能量传输效率达到最佳;其中,叶轮导向角β的影响最大,叶轮叶片数n次之,叶轮长度L0最小。
Through numerical simulation was made on the impeller orientation angle(β),the number of the impeller(n) and the impeller length(L0) of the impeller of rotating jet bits for studying influence of impeller parameters of the bits on the jet flow field and its rules.The results show that when the impeller orientation angle is β=50~60°,the number of the impeller is n=4,the impeller length is L0 =20~25mm,the best impeller of rotating effect and energy transfer efficiency are achieved for fluid.In the three parameters,the impeller orientation angle plays a major role for the effect of the jet flow field,the number of the impeller is second,the impeller length is the minimum.
出处
《石油天然气学报》
CAS
CSCD
2012年第11期147-150,172,共4页
Journal of Oil and Gas Technology
基金
2009年度湖北省高等学校优秀中青年科技创新团队项目(T200906)
湖北省教育厅重点项目(D20121207)
关键词
旋转射流
叶轮结构
旋流强度
流量系数
rotating jet
impeller structure
swirl strength
flow coefficient