Effects of cavitation in a nozzle on liquid jet atomization

被引：254

作者：

Sou, Akira ^{[1
]}

Hosokawa, Shigeo ^{[1
]}

Tomiyama, Akio ^{[1
]}

机构：

[1] Kobe Univ, Fac Engn, Kobe, Hyogo 6578501, Japan

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2007年 / 50卷 / 17-18期

基金：

日本学术振兴会;

关键词：

cavitation; liquid jet; atomization; visualization; ligament; internal flow;

D O I：

10.1016/j.ijheatmasstransfer.2006.12.033

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Cavitation in two-dimensional (2D) nozzles and liquid jet in the vicinity of the nozzle exit were visualized using high-speed cameras to investigate the effects of cavitation on liquid jet under various conditions of cavitation and Reynolds numbers sigma and Re. Liquid velocity in the nozzle was measured using a laser Doppler velocimetry to examine the effects of cavitation on the flow in the nozzle and liquid jet. As a result, the following conclusions were obtained: (1) cavitation in the nozzles and liquid jet can be classified into the four regimes: (no cavitation, wavy jet), (developing cavitation, wavy jet), (super cavitation, spray) and (hydraulic flip, flipping jet), (2) liquid jet near the nozzle exit depends on cavitation regime, (3) cavitation and liquid jet are not strongly affected by Re but by a, and (4) strong turbulence induced by the collapse of cavitation clouds near the exit plays an important role in ligament formation. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3575 / 3582

页数：8

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