旋转射流钻头叶轮结构参数对射流流场影响规律的研究

The Effects of Impeller Structural Parameters of Rotating Jet Bit on Jet Flow Field

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.