FLOW CHARACTERISTICS OF THE MAIN NOZZLE IN AN AIR-JET LOOM .1. MEASURING FLOW IN THE MAIN NOZZLE

被引：21

作者：

ISHIDA, M ^{[1
]}

OKAJIMA, A ^{[1
]}

机构：

[1] KANAZAWA UNIV,KANAZAWA,ISHIKAWA 920,JAPAN

来源：

TEXTILE RESEARCH JOURNAL | 1994年 / 64卷 / 01期

关键词：

D O I：

10.1177/004051759406400102

中图分类号：

TB3 [工程材料学]; TS1 [纺织工业、染整工业];

学科分类号：

0805 ; 080502 ; 0821 ;

摘要：

To obtain basic data for an optimum design of the main nozzle for an air-jet loom, we have made measurements of static pressures on the walls of the main nozzle and analyzed flow velocity changes in the nozzle tube by changing air tank pressures and acceleration tube lengths. The flow may reach a critical condition of Mach 1 at two positions, the needle tip and the acceleration tube exit. Increased tank pressure brings about the critical throat condition at these two positions, so the flow in the nozzle can be completely defined. The tank pressure P(T) to bring the needle tip to the critical condition depends on the acceleration tube length, and P(T) is higher for longer acceleration tubes. The P(T) value required to bring the acceleration tube exit to the critical condition is nearly constant regardless of acceleration tube length. For the nozzle used in this experiment, tank pressure was about 4 kgf/cm2.

引用

页码：10 / 20

页数：11