Variable Area Water Flowmeters for Thermal Gas Mass Flow Meters
Brand Name:Thermal Gas Mass Flow Meters
Model Number:Thermal Gas Mass Flow Meters
Minimum Order Quantity:1 pc
Delivery Time:7-14 days
Payment Terms:T/T
Place of Origin:China
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Room 2204, Unit 1, No. 91, Taoyuan South Road, Xi'an, Shaanxi, China
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Variable Area Water Flowmeters for Thermal Gas Mass Flow Meters
Vortex flow measurement is based on the Karman Vortex Street
principle, where a cylindrical object is vertically inserted into
the measuring tank. When the fluid passes through the cylindrical
object, under certain conditions, two rows of regular vortices are
generated alternately on both sides of the column. As shown in the
figure below, these two rows of vortices are called "Carmen vortex
streets". When d/D=0.281, the released vortices are the most
stable. The frequency of Carmen vortex street release is related to
the velocity of fluid flow and the width of the column, and can be
simply expressed by the following formula:
F=St × V/d
F: Release frequency of Carmen vortex street
St: coefficient (referred to as Strouhal number)
V: Fluid flow velocity
D: Column width
Basic characteristics
Better seismic performance
Low lower limit flow rate, up to 1/2~1/4 of conventional vortex
flowmeter
Wide range ratio, usually up to 1:30~1:50
Simple debugging operation with HART communication function
(optional)
Instantaneous flow display, cumulative total display, percentage
display, frequency display
4-20mA output, 0-5KHZ frequency output, vortex pulse output
Using Chinese and English operating menus, easy to read and
understand.
Variable Area Water Flowmeters for Thermal Gas Mass Flow Meters
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