Coriolis flowmeters: A review of developments over the past 20 years, and an assessment of the state of the art and likely future directions

This paper starts from a brief revisit of key early published work so that an overview of modern Coriolis flowmeters can be provided based on a historical background. The paper, then, focuses on providing an updated review of Coriolis flow measurement technology over the past 20 years. Published research work and industrial Coriolis flowmeter design are both reviewed in details. It is the intention of this paper to provide a comprehensive review study of all important topics in the subject, which include interesting theoretical and experimental studies and innovative industrial developments and applications. The advances in fundamental understanding and technology development are clearly identified. Future directions in various areas together with some open questions are also outlined.This is the accepted manuscript version. The final version is available from Elsevier at http://dx.doi.org/10.1016/j.flowmeasinst.2014.08.01

Net-phase flow NMR for compact applications

The net phase of the NMR signal is proposed as a robust mechanism for the encoding of fluid flow velocity into phase, showing local bijectivity. While magnitude-based or imaging-based methods suffer from loss of signal, by increasing the flow rate, the present method enables us to maintain the high SNR even for the case of fast flow. In addition, it is shown that a well-engineered flow channel is also necessary, which is not the case for traditional cylindrical flow channels. In this contribution, we report on implementing this approach in a low-cost NMR-based flowmeter for use in a low field (1 T) setting, for example, for monitoring reaction flow industrial processes

High efficiency dynamic pressure based flow measurement

Over the past few decades considerable attention have been directed towards the development of different types of flow-metering techniques. High pressure drop after passing the metering device and partial obstruction of the flow represent the two most common problems for the majority of the existing flow-metering devices. The main intention of the current study was to overcome or minimize these two issues. The principle objectives were developing a low-cost measurement system and setup to measure the flow in pipes of small diameters (0.5” to 4”), and performing an analytical / numerical model that enables to extract the distinction of the dynamic pressure throughout the flow. Both analytical and numerical solutions of the fluid flow inside the pipe indicate forming of a parabolic velocity profile across the pipe in the fully developed flow region. Dynamic pressure variation due to velocity change across the pipe is used as the fundamental measurement principle in this work. The equipped cantilever beams with piezo-resistive materials are used as sensor for detecting the induced signals in three different levels across the pipe. The collected signals are used to reconstruct the parabolic velocity profile. Further, the integration of the parabolic profile in the cross-section area of the pipe will yield to the flow value. The constructed sensors with strain gages are connected to a Wheatstone-Bridge. The resistance variation due to the strain changing in cantilever platform converts to voltage variation by the Wheatstone-Bridge. Signal amplification and filtering are carried out by a dedicated circuit board. The work was extended to inkjet-printing of the conductive ink which is introduced as an alternative method for piezoresistive sensor fabrication. Easiness and fast-fabrication process are two important factors which give ability to mass production of low-cost piezoresistive sensors

Index to 1985 NASA Tech Briefs, volume 10, numbers 1-4

Short announcements of new technology derived from the R&D activities of NASA are presented. These briefs emphasize information considered likely to be transferrable across industrial, regional, or disciplinary lines and are issued to encourage commercial application. This index for 1985 Tech Briefs contains abstracts and four indexes: subject, personal author, originating center, and Tech Brief Number. The following areas are covered: electronic components and circuits, electronic systems, physical sciences, materials, life sciences, mechanics, machinery, fabrication technology, and mathematics and information sciences

Imaging of the Water Velocity Distribution in Water Continous Multiphase Flows Using Inductive Flow Tomography (IFT)

In the oil-gas fields, slurry flows, gas-in-water two phase flows, and oil-gas-water three phase flows are frequently encountered. Generally, the measurement of volumetric flow rate for each phase is of most interest, especially in subsea oil-gas production applications, where it is essential to obtain oil, water and gas flow rates in inclined oil wells. The problem of how to accurately measure these flow parameters for such complicated flow phenomena, without using expensive and large test separators, is a major challenge for the industry. Most conventional multiphase flow meters have severe limitations regarding types of flow and their measurement reliability. Some useful techniques containing radioactive sources are available but they are expensive and potentially harmful to humans. Thus, many academic and industrial researchers are working to develop a multiphase flow meter based on tomographic techniques that does not contain a radioactive source. Such a device would normally involve at least two independent flow metering techniques. Tomographic techniques have been successfully used in multiphase flows to determine the local volume fraction distributions of the various phases; however, only a very small number of results can be found in the published literature concerning the equally significant problem of local velocity distribution. Therefore, the aim of this research is to develop a non-intrusive flow measurement technique, without the use of radioactive sources, for measuring the local axial velocity distribution of the electrically conducting continuous phase in multiphase flows. This thesis reports the development of a multi-electrode electromagnetic flow metering technique, the so-called Inductive Flow Tomography (IFT), for obtaining the local flow velocity distributions of the electrically conducting continuous phase in multiphase flows, with particular relevance to gas-in-water two phase and oil-gas-water three phase flows. Previous research has indicated that the electromagnetic flow meter (i.e. Electromagnetic Velocity Profiler) is a promising technique for measuring the local axial water velocity in single phase and solid-in-water two phase flow. However, that technique has several limitations, which means it is valid only for determining water velocity profiles in seven regimes of the pipe crosssection. A novel multi-electrodes electromagnetic IFT flow metering system has been developed in the research described in this thesis, which is capable of determining the local conducting continuous phase velocity at any position in the flow cross-section (in vertical and inclined pipes). The theoretical work carried out in developing the IFT system includes a completely novel flow velocity distribution “image reconstruction algorithm”, which is described in the thesis. This thesis also describes the design and subsequent implementation of the hardware and software for the IFT system. In the final sections of this thesis, a series of experiments, which include inclined gas-oil-water three phase flow and gas-in-water two phase flow, were performed to investigate the performance of the IFT system. The experimental results obtained show a good agreement between the reference measurements and velocity measurements obtained using the IFT syste

Argonne National Laboratory Reports

This sixth symposium covers process control processes and issues involved in the conversion of fossil fuels into synthetic fuels

Research and technology 1991 annual report

As the NASA Center responsible for assembly, checkout, servicing, launch, recovery, and operational support of Space Transportation System elements and payloads, NASA Kennedy is placing increasing emphasis on the center's research and technology program. In addition to strengthening those areas of engineering and operations technology that contribute to safer, more efficient, and more economical execution of the current mission, the technical tools are being developed which are needed to execute the center's mission relative to future programs. The Engineering Development Directorate encompasses most of the labs and other center resources that are key elements of research and technology program implementation and is responsible for implementation of the majority of the projects in this Kennedy Space Center 1991 annual report