微 小 噴 嘴 液 柱 碰 撞 後 之 現 象 觀 察

Characteristic study on a liquid sheet formed by two impinging jets generated by micro-nozzle

簡士凱(Shi–Kai Jian)

指導教授 ： 王興華

國立臺灣大學/工學院/機械工程學研究所/碩士(2004年)

https://doi.org/10.6342/NTU.2004.01247

摘要

本文主要探討在室溫室壓下(20~25 )利用兩噴嘴噴出液柱碰撞後所形成之薄片。以水為測試液並用0.022mm，0.035mm，0.047mm，0.063mm四種不同尺寸的噴嘴作液柱碰撞。發現不同與前人的現象，並加以詳述之。另外討論碰撞角度、不同尺寸、速度的改變跟碰撞後所形成的薄片形狀之間的關係，發現其有一定的趨勢，並將結果以無因次化討論。最後算其實驗的最大不準確度。

關鍵字

液柱碰撞 ； 霧化

並列摘要

In this article an experimental study is presented by a liquid sheet formed by two impinging jets at l atm/20~25oC. We use water as the test liquid to experiment a liquid sheet formed by two impinging jets by four different sizes--- 0.022mm, 0.035mm, 0.047mm, 0.063mm. We find that some results of the experiment distinguish from those of the previous researches. Besides, we discuss the relationship about the shapes of a liquid sheet formed by two impinging jets by changing the shedding angle, size, velocity. Since we discover a tendency from the relationship, we talk about the outcome presented by dimensionless analysis. At last, we calculate the most erroneous degree of accuracy in our experiment.

並列關鍵字

atomization ； impinging jets

參考文獻

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[4]N.Dombrowski and P.C.Hooper,”A Study of the Spray Formed by Impinging Jets in Laminar and Turbulent Flow”,J.Fluid Mech,Vol.18

[5]D. Hasson and R.E.Peck,”Thickness Distribution in a Sheet Formed by Impinging Jets”,A.I.Ch.E.Journal,Vol.10,pp752-754 (1964).

[6]B.S.Kang,Y.B.Shen,and D.Poulikakos,”Holography Experiment in the Breakup Region of a Liquid Sheet Formed by Two Impinging Jets”,