Acoustic fluid flow monitoring
First Claim
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1. A passive, non-invasive method of measuring the flow and composition of a fluid or mixture of fluids through a structure within a system by:
- attaching a thermometer, a pressure gauge, and a transducer to said structure for respectively detecting temperature, pressure, and sound in said fluid or mixture of fluids;
producing sounds corresponding to naturally occurring vibrations stimulated by flow of said fluid or mixture of fluids through said structure;
passing said sounds through said fluid or mixture of fluids;
detecting said sounds exiting from said fluid or mixture of fluids by use of said transducer;
determining the temperature, pressure and speed of sound in said fluid or mixture of fluids in said system by respectively using said thermometer, said pressure gauge and said fluid or mixture of fluids and calculating the flow, molar density and average molecular weight of the fluid from the equation;
##EQU24## wherein;
cP =isobaric heat capacityC.sub.ρ
=isochoric heat capacityc=speed of soundP=pressure of the fluidT=temperature of the fluidρ
=molecular density of the fluidM=average molecular weight of the fluidφ
=velocity potentialt=time;
(a) the molar density of the fluid being determined from the equation of state over a small temperature range T-T'"'"';
##EQU25## wherein;
f=any EOST'"'"'=average temperature; and
(b) the average molecular weight of the fluid being determined from the equation;
##EQU26## wherein;
f=EOS;
said temperature, pressure and speed of sound being determined, respectively, by means of a thermometer, pressure gauge and transducer positioned in said system.
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Abstract
A method of measuring the flow and composition of a fluid or mixture of fluids through a system by determining the temperature, pressure and speed of sound in the fluid or mixture of fluids in the system and calculating the flow, molar density and average molecular weight of the fluid from the equation: ##EQU1## wherein: ##EQU2## c=speed of sound P=pressure of the fluid
T=temperature of the fluid
ρ=molecular density of the fluid
M=average molecular weight of the fluid
φ=velocity potential
t=time.
155 Citations
4 Claims
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1. A passive, non-invasive method of measuring the flow and composition of a fluid or mixture of fluids through a structure within a system by:
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attaching a thermometer, a pressure gauge, and a transducer to said structure for respectively detecting temperature, pressure, and sound in said fluid or mixture of fluids; producing sounds corresponding to naturally occurring vibrations stimulated by flow of said fluid or mixture of fluids through said structure; passing said sounds through said fluid or mixture of fluids; detecting said sounds exiting from said fluid or mixture of fluids by use of said transducer; determining the temperature, pressure and speed of sound in said fluid or mixture of fluids in said system by respectively using said thermometer, said pressure gauge and said fluid or mixture of fluids and calculating the flow, molar density and average molecular weight of the fluid from the equation;
##EQU24## wherein;
cP =isobaric heat capacityC.sub.ρ
=isochoric heat capacityc=speed of sound P=pressure of the fluid T=temperature of the fluid ρ
=molecular density of the fluidM=average molecular weight of the fluid φ
=velocity potentialt=time; (a) the molar density of the fluid being determined from the equation of state over a small temperature range T-T'"'"';
##EQU25## wherein;
f=any EOST'"'"'=average temperature; and (b) the average molecular weight of the fluid being determined from the equation;
##EQU26## wherein;
f=EOS;
said temperature, pressure and speed of sound being determined, respectively, by means of a thermometer, pressure gauge and transducer positioned in said system. - View Dependent Claims (2, 3, 4)
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Specification
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Current AssigneeUniversity of Florida Research Foundation, Incorporated (State University System of Florida)
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Original AssigneeUniversity of Florida Research Foundation, Incorporated (State University System of Florida)
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InventorsMcGill, Kenneth C., Colgate, Samuel O.
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Primary Examiner(s)williams, Hezron E.
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Assistant Examiner(s)BROCK, MICHAEL J
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Application NumberUS07/894,629Time in Patent Office620 DaysField of Search73/61.41, 73/61.44, 73/61.46, 73/61.47, 73/61.49, 73/61.45, 73/23.2, 73/24.01, 73/30.01, 73/30.02, 73/30.03, 73/31.04, 73/24.0 5US Class Current73/23.2CPC Class CodesG01N 2291/02836 Flow rate, liquid levelG01N 2291/02881 TemperatureG01N 29/024 by measuring propagation ve...
