HEMAJET空氣噴嘴內流場之計算模擬

Numerical Simulation of Internal Flow Field of HEMAJET Nozzle

黃博欣(Bo-Xin Huang)

指導教授 ： 趙修武

中原大學/工學院/機械工程研究所/碩士(2005年)

https://doi.org/10.6840/cycu200500531

摘要

摘要
空氣噴嘴在紡紗過程中扮演著非常大的角色，其主要為利用高壓空氣進入空氣噴嘴所產生的紊流與渦流之動力使紗支纖維分離、鬆弛、彎曲、形成圈環(Loop)、螺旋、糾結與結圈等不規則之混合，使其擁有均勻的物性以利於後段加工。
本文為利用流體力學方法解析空氣噴嘴內部流場，對模擬計算後的結果進行分析並與Acar和Wray所作的實驗結果進行比較驗證，主要驗證HemaJet空氣噴嘴在入口壓力4.0e105 Pa 至7.0e105 Pa及圓柱形空氣噴嘴在在入口壓力為6.0e105 Pa，空氣噴嘴內部流場特性。

關鍵字

計算流體力學 ； 空氣噴嘴

並列摘要

Abstract
The air-jet nozzle is the key component in the yarn-texturing process. The high-pressure air inside the air-jet nozzle, characterized by the strong turbulence and vorticity, enhances the texturing of yarn.
This paper employs the methods of computational fluid dynamics to investigate the internal flow field of air-jet nozzle. The calculated results are then compared with experimental measurements published Acar and Wray. Two type of air-jet nozzle are analyzed: Hemajet air-jet nozzle and Cylindrical air-jet nozzle. The Hemajet nozzle is computed at an inlet pressure from 4.0e105 Pa to 7.0e105 Pa, while the Cylindrical nozzle is only computed for the inlet pressure of 6.0e105 Pa.

並列關鍵字

air-jet nozzle ； computational fluid dynamics

參考文獻

[20] 吳文欽，“高效率空氣噴嘴流場之數值研究”，私立中原大學機械工程

Process Part Ⅰ: A Brief History of Development in the Process,” J. Text.

[3] Acar, M. and Wray, G

Textile Institute, No.1, 1986.

[4] Acar, M. and Wray, G