Results 141 to 150 of about 2,645,003 (172)
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An ultrasonic transit-time gas flowmeter for automotive applications
Proceedings of IEEE Sensors, 2004., 2006A new concept for ultrasonic transit-time gas flowmeters, utilizing high temperature resistant capacitance transducers, and results from a preliminary laboratory prototype, are presented. With this concept, measurements of hot (up to 450/spl deg/C) and pulsating gas flows have been achieved for the first time. Such conditions occur e.g.
M. Kupnik +4 more
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Effect of wall roughness changes on ultrasonic gas flowmeters
Flow Measurement and Instrumentation, 2001Abstract A theoretical flow model has been developed to describe accurately a fully developed velocity profile of a gas flow in pipe lines with wall roughness as parameter. The model applies the Colebrook and White skin friction correlation which has been adjusted based on experimental data from Princeton SuperPipe facilities.
A Calogirou, J Boekhoven, R.A.W.M Henkes
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Design and Implementation of AGC in Gas Ultrasonic Flowmeter
2007 8th International Conference on Electronic Measurement and Instruments, 2007The paper proposes a new circuit of all-digital automatic gain control (AGC) in the gas ultrasonic flowmeter at first. The design is implemented on the EP1S40F1020 FPGA chip. A scheme, design of main function modules and test are given in the paper. This design can achieve 40dB dynamic range control, with advantages of high precision, high rangeability,
Liu Yanping, Liu Xin, Nan Jing, Yang Jia
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New developments in ultrasonic gas analysis and flowmetering
2008 IEEE Ultrasonics Symposium, 2008Ultrasonic methods have important advantages in the measurement of gas flow, including the ability to measure almost any gas or gas mixture over a wide pressure range and turndown ratio. Ultrasonic gas flowmeters also are capable of measuring bi-directional flow and may be non-intrusive with no pressure loss.
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Computational modeling of dilute gas-particle flows in an ultrasonic gas flowmeter
Flow Measurement and Instrumentation, 1997Abstract A computational procedure is presented to predict particle-laden turbulent gas flows in an ultrasonic flowmeter using curvilinear coordinates. The Eulerian-Lagrangian hybrid model is used for the two-phase flow predictions. The turbulent gas phase is formulated using the Eulerian governing equations whereas the particle phase is formulated ...
X.-Q. Chen, J. C. F. Pereira
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Effect of ultrasonic noise generated by pressure control valves on ultrasonic gas flowmeters
Flow Measurement and Instrumentation, 2018Abstract Natural gas imported to Korea has been provided and distributed by the pressure regulating and metering stations of Korea Gas Corporation (KOGAS) to domestic customers which include the power plants and city gas companies. The supplied natural gas is pressure-controlled to 10 and 40 bara by pressure control valves of several types, such as ...
Woong Kang +4 more
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Measurement of high-pressure natural gas flow using ultrasonic flowmeters
Measurement, 1997Abstract A number of analyses have been carried out on both the installation effects and the calibration problems of transit time multipath flowmeters. There is, however, only a somewhat sketchy knowledge of their field operation, their long-term performance, and their compatibility with traditional instruments and measurement techniques.
CANNIZZO M. +2 more
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Note: Ultrasonic gas flowmeter based on optimized time-of-flight algorithms
Review of Scientific Instruments, 2011A new digital signal processor based single path ultrasonic gas flowmeter is designed, constructed, and experimentally tested. To achieve high accuracy measurements, an optimized ultrasound driven method of incorporation of the amplitude modulation and the phase modulation of the transmit–receive technique is used to stimulate the transmitter. Based on
X F, Wang, Z A, Tang
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Gas density metering in ultrasonic gas flowmeters using impedance measurements and chemometrics
1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027), 1999Measurements using ultrasonic transducers confirm that the density of the gaseous medium can be predicted from impedance measurements on the same transducers. Tests were performed with the following gases under different pressure: SF6, N2, He, and air. These gases were selected to achieve a large span of densities.
S. Mylvaganam +3 more
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The Application of Ultrasonic Flowmeter on Trade Measurement in Yulin Gas Field
2011 Second International Conference on Mechanic Automation and Control Engineering, 2011In this paper, the working principle and system components of ultrasonic flowmeter are briefly introduced In accordance with ultrasonic flowmeter applicated in YuLin gas field, comparing the transmission error of upper and lower streams measurement on this basis, the pre-Operation measurement error and actual flow test/ calibration are explored and ...
Xiao Rong Ge
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