NDLI: Sprinkler performance as affected by nozzle inner contraction angle

Content Provider	Springer Nature Link
Author	Li, Jiusheng Kawa, Hiroshi
Copyright Year	1998
Abstract	The discharge-pressure relationship for the orifice nozzle is essential for developing new sprinkler prototypes and designing sprinkler irrigation systems. In this work, the sprinkler nozzle inner contraction angle was varied from 20° to 90° to establish the relationship between discharge and pressure. The sprinkler nozzle discharge increases exponentially with increasing pressure. The discharge exponent is essentially independent of the nozzle contraction angle and can be taken as 0.5, while the discharge coefficient decreases significantly with increasing contraction angle. Sprinkler rotation speeds measured for different contraction angle nozzles decreased as the angle increased. Water distributions were tested indoors for various contraction angles. Sprinkler nozzles with contraction angles ranging from 20° to 60° produced approximately equal pattern radii and similar water application profiles, but the pattern radius was significantly reduced for contraction angles above 60°. The optimum inner contraction angle is about 30°.
Starting Page	63
Ending Page	66
Page Count	4
File Format	PDF
ISSN	03427188
Journal	Irrigation Science
Volume Number	18
Issue Number	2
e-ISSN	14321319
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-06-08
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science Water Science and Technology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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