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Title: Fundamentals Of Vortex Flowmeters
Author: Dennis Ciccarelli
Source: 1999 Appalachian Gas Measurement Short Course
Year Published: 1999
Abstract: The phenomena of vortex shedding has been investigated in modern times by several notable people. Herman Von Helmholtz (1821-1894) V. Strouhal, who in 1878 published a comprehensive study of vortex shedding bluff bodies and Theodore von Karman (1881- 1963), who received a patent for a vortex shedding flowmeter. As you will see this phenomena surrounds us in or every day life. The principle is fairly straight forward putting it commercial use is less so. Vortex meters offer a number of benefits. Assuming that a given model is operating within its fundamental constraints in terms of minimum velocity and Reynolds number range some advantages include: No moving parts. The simplicity of construction and use of stainless steel materials will provide many years of uninterrupted and low maintenance service. High accuracy ( 1% of rate) and excellent repeatability. Linear flow measurement that is virtually independent of the fluids properties. Flexible measurement of a wide variety of fluids such as liquids, gases, and steam, all with the same meter. Low operating costs Turndown ratios of up to 20:1 Low installation costs. The meters can be simply bolted between two standard flanges and connected to a power source.

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