in Bradford .
Written in English
Ph. D.thesis. Typescript.
|The Physical Object|
|Number of Pages||102|
the flow of gas from volcanic jets. Cross correlation flowmeters are based on measuring the transit time of a tagging signal (turbulence, clumps of The reader should refer to the book by Bendat and Piersol () for a complete treatment of these procedures for there is no pressure loss with cross correlation flowmeters. Ultrasonic Cited by: Ultrasonic flowmeters for gas have been commercially available since the s, and they are widely accepted today for flaregas and stackgas monitoring and for a wide variety of industrial and fuel gas measurements. Highly accurate multi-path meters are approved and commonly used for custody transfer measurement of natural gas. Books. Publishing Support. Login. Reset your password. If you have a user account, you will need to reset your password the next time you login. You will only need to do this once. Find out more. IOPscience login / Sign by: flowmeters, thermal flowmeters, ultrasonic pulse transit flowmeters, magnetic flowmeters, Coriolis type flowmeters etc.  Cross correlation flowmeters are one from the sensors for the volume flow rate measurement. The basic idea is simple. The cross correlationflowmeter measures flow by sensing the passage of some.
Ultrasonic flowmeters for gas have been commercially available since the s, and they are widely accepted today for flaregas and stackgas monitoring and for a wide variety of industrial and fuel gas measurements. Highly accurate multi-path meters are approved and commonly used for custody transfer measurement of natural gas. Flow Velocity Measurement (v) using Cross Correlation The flow velocity determination method is based on the ultrasonic reflection principle. One of the most modern and most efficient flow velocity measurement methods is the NIVUS correlation method. FUNDAMENTALS OF ULTRASONIC FLOW METERS Mike Scelzo, Steve Milford, Nick Mollo, Jed Matson GE Infrastructure Sensing Technology Park Drive Billerica, MA Natural Gas Flow Meter History Although they are considered relatively new, transit-time ultrasonic flow meters for natural gas measurement date back more than 25 years. by the flow velocity and liquid content) has on an ultrasonic clamp-on flow meter. The piping under test was horizontal, therefore no data is available for metering on vertical or inclined pipes. The amount of liquid in a gas depends on many factors including the pressure and temperature of the gas in the pipe.
Stability of zero points of the flowmeter by the zero-cross and cross-correlation methods. Digital processing was used in the ultrasonic flowmeter. The analog signal detected by the sensors was converted into a digital signal at sampling frequencies of , 25 and MHz to examine the effect of sampling speed. Based on past experience with ultrasonic cross-correlation flow meters in power plant environments, the presence of spatially correlated noise due to pressure waves, vibration, or sources other than transport of turbulent eddies will cause a bias in the time delays measured by the meter. A new model for Ultrasonic Cross Correlation Flow Meters (USCCFM) has been developed as result of industrial experience at Ontario Power Generation (OPG). Industrial applications of USCCFM have encountered cases where the frozen pattern model failed. The new model is based on the mathematical properties of turbulent velocity fields and correlation functions. Gas Flow Meter The DigitalFlow CTF clamp-on gas ﬂow meter utilizes a new technology called correlation tag (patented) to determine gas ﬂow rate. This technique is very diff erent from traditional ultrasonic transit-time measurement and is well-suited for gas .