Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 99 for “"flow measurement"”.
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Rotating Vane Flow Measurement Techniques
… into the development and performance of vane flowmeter methods for the measurement of air and gas flow. To improve on existing rotating vane anemometer performance, a capacitance change vane sensing technique is investigated. In conjunction with Ower's dynamic equations steady state and step …
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3D-flow measurement by stereo imaging
Ein neues Verfahren zur Messung des dreidimensionalen Strömungsfeldes mittels 'Particle Tracking Velocimetry' wird vorgestellt. Ein zweidimensionales Particle Tracking Velocimetry liegt dem Verfahren zugrunde. Es wurde auf die dritte Raumdimension erweitert, um den gesamten physikalischen Raum zu …
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Fluid flow measurement using correlation techniques
… of the temperature cross correlation method to measurement of flow under steady and pulsating flow conditions is investigated. The factors to be considered in applying this technique to different flow systems are discussed and its advantages over the conventional techniques are highlighted. The …
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Impedance Sensors for Fast Multiphase Flow Measurement and Imaging
Multiphase flow denotes the simultaneous flow of two or more physically distinct and immiscible substances and it can be widely found in several engineering applications, for instance, power generation, chemical engineering and crude oil extraction and processing. In many of those applications, …
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Fluid flow measurement using electrical and optical fibre strain gauges.
The design, development and calibration of three flow sensors to measure the speed and direction of fluid flow is presented in this thesis. The force exerted by the fluid flow on the sensors are measured using strain gauges. Multidirectional fluid flow measurement has been made possible by …
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Development of Advanced Image Processing Algorithms for Bubbly Flow Measurement
An accurate measurement of bubbly flow has a significant value for understanding the bubble behavior, heat and energy transfer pattern in different engineering systems. It also helps to advance the theoretical model development in two-phase flow study. Due to the interaction between the gas and …
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Non-invasive electromagnetic wave sensor for flow measurement and biphase application
Multiphase flow measurement is important in chemical processing, water treatment and oil & gas industry. The multiphase flow sensor proposed in this research utilizes the resonant frequencies that occur inside a cavity and the differences in the permittivity of the measures phases. By measuring …
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Couette flow measurement of equilibrium and energization charging in transformer insulation
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1987.
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Two-Phase Flow Measurement using Fast X-ray Line Detector System
… mass transfer mechanisms in various gas-liquid flow systems. It becomes critically important to accurately measure void fraction as advanced high fidelity two-phase flow models require high-quality validation data. However, void fraction measurement remains a challenging task to date due to the …
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Three-Dimensional Fluid Flow Measurement Techniques with Applications to Biological Flows
… is measured by simulating three-dimensional flows and measuring the errors in the estimated versus true velocity fields. Parametric studies investigate the accuracy of these methods by simulating a range of camera numbers, camera angles, calibration errors, and particle densities. The …
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Hydraulic Effects of Perpendicular Water Approach Velocity on Meter Gate Flow Measurement
<p>Accurate flow measurement is required to effectively manage water resources. California Senate Bill X7-7 (SB X7-7), legislates this need by requiring agricultural water providers serving areas greater than 25,000 acres to develop an Agricultural Water Management Plan (AWMP) and adopt pricing …
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Mass flow measurement of multi-phase mixtures by means of tomographic techniques
… system to calculate the individual mass flow rates of the components in an air-gravel-seawater mixture. The long-term goal of this research is to develop a multi-phase flowmeter for the on-line monitoring of an airlift used in an offshore mining application. This requires the measurement …
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Asymmetric flow measurement in space constrained cooling water ducts using a traversing probe
… research was to identity and recommend a type of flow measurement technique suitable for flow measurements in the CW ducts. After conducting a literature survey, the author restricted research to a local flow measuring technique as a result of physical constraints on site. In addition, the flow …
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Development of a Fast X-ray Line Detector System for Two-Phase Flow Measurement
Measuring void fraction distribution in two-phase flow has been a challenging task for many decades because of its complex and fast-changing interfacial structure. In this study, a non-intrusive X-ray measurement system is developed and calibrated to mitigate this challenge. This approach has …
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Uncertainty Quantification and Accuracy Improvement of the Double-Sensor Conductivity Probe for Two-Phase Flow Measurement
… local time-averaged parameters in two-phase flows. The uncertainty of this measurement technique has not been well understood in the past as it involves many different steps and influential factors in a typical measurement. This dissertation aims to address this gap by performing a systematic …
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Non-Invasive Flow Measurement Via Distributed Acoustic Sensing Utilizing Frequency Spectra Analysis of Wall Pressure Fluctuations
… sensing to noninvasively measure volumetric flow rate via multiple unique sensor styles. This work modifies previously used methods of flow detection via fiber optic acoustic sensors affixed onto the exterior body of a flow apparatus. Flow rate measurement methods for two unique sensor styles …
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Anisotropic Flow Measurement in Ultra-Central Pb-Pb Collisions For Run 10 and Run 11 by ALICE
… as the Quark-Gluon Plasma (QGP). The collective flow of the system plays a critical role in establishing the equation of state of the QGP. Among different orders of azimuthal flow, the second order elliptic flow receives keen attention and will be analyzed in the ultra-central collision …
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Atomization and Deposition in Two-Phase Annular Flow: Measurement and Modeling (Pressure Drop, Thin Films, Turbulent Dispersion)
… the wall layer in vertical annular two-phase flow and of deposition of this liquid back to the liquid film. These models have been incorporated into a design scheme for the prediction of two-phase pressure drop and fully developed entrained liquid fraction for the annular regime.
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Virtual sensor for air mass flow measurement in an SI engine: Application of distributed lumped modelling in prediction of air mass flow into the cylinder of SI combustion engines
… an extensive study about engine air mass flow measurement approaches as well as engine modelling for air mass flow prediction, a major problem found to exist is that engineers have still not found a suitable technique to accurately measure the air mass flow entering the cylinder of an …
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