Abstract： Some related parameters of nozzel installation positi on and the influencing regulation of the slotting numbers of untwisted tube on the yarn strength were researched.

摘 要： 研究了喷气纺纱喷嘴安装位置有关参数及槽数对成纱强力的影响规。

Fluid is conveied to bit nozzel through drill string from pump is a transient state flowing with pressure wave, which makes the fluid jetted out from nozzel has certain pulsation.

从井泵经过柱内部输头喷嘴的流体是一种瞬态流动，存在着压力行波，使从普通喷嘴射出的流体有一定程度的脉动。