The total air budget in oxygenated water flowing in a drip tape irrigation pipe

被引：12

作者：

Bhattarai, S. P. ^{[1
]}

Balsys, R. J. ^{[2
]}

Wassink, D. ^{[3
]}

Midmore, D. J. ^{[1
]}

Torabi, M. ^{[1
]}

机构：

[1] Cent Queensland Univ, Ctr Plant & Water Sci, Rockhampton, Qld 4702, Australia

[2] Cent Queensland Univ, Ctr Intelligent & Networked Syst, Rockhampton, Qld 4702, Australia

[3] Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia

来源：

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW | 2013年 / 52卷

关键词：

Oxygation; Air injector; Bubble visualization; Total air budget; SURFACTANT; BUBBLES; YIELD; SOIL;

D O I：

10.1016/j.ijmultiphaseflow.2013.01.004

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

In this work we concentrate on the measurement of the total air volume profile along an irrigation drip tape and the pilot testing of a visualization assembly suitable for use in the irrigation industry under field conditions. The visualization system is based on continuous image capturing and can be used to determine the number and size of bubbles, as well as estimate the void fraction percentage of air in aerated water stream. The research results produced a number of positive outcomes for continuous monitoring of bubble behaviour during irrigation. We obtained data on the air fraction in aerated water using our experimental setup for three treatments - open end drip tape, closed end drip tape and closed end drip tape with surfactant added to the air/water stream. From these data we determined the void fraction of air in the irrigation water stream along the length of drip tape, showing a decline with distance from the Mazzei Venturi model 384 air source, an effect offset to some extent by addition of 2 ppm of surfactant to the irrigation water. The void fraction estimates derived from the images from the camera system are consistent with the system specifications from the Mazzei air injectors performance based on Bernoulli's principle. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：121 / 130

页数：10

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