IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 3 - WATER ENGINEERING AND CIVILIZATION : Standardization of Swirl Meter Instrumentation used for Physical Model Study of Pump Intake Structur...
Standardization of Swirl Meter Instrumentation used for Physical Model Study of Pump Intake Structures
Author : Mahmood Naghash
A swirl meter (also known as a vortimeter or rotometer) is a custom-built instrument necessary for measuring the intensity of any flow rotation in the pump column or suction pipe of a physical hydraulic model study for pump intake structures. The design of the swirl meter varies with the laboratory performing the physical model testing, and frequently its design is proprietary. The Hydraulic Institute standard (ANSI\HI 9.8-2012) specifies the swirl meter geometry requirements, the acceptance criteria, and states a low friction bearing to be applied for rotating mechanical module of the swirl meter. However, since the details of the mechanical rotating module are not specified, the sensitivity of the swirl meter varies widely among testing laboratories around the world. The varying swirl meter rotating module design requires varying drag force to provide the same rotational speed. Consequently, the swirl meters made by different testing laboratories results in varied measured swirl angle for the same physical model creating inconsistent results. This paper reexamines the swirl meter design and implementation guidelines and provides suggestions for a standard design. Also, due to decay of swirl intensity with distance along a pump column, the location of the swirl meter in a pump column is reevaluated.
File Size : 166,077 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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