Measuring pulsating flow with ultrasound

Skwarek, Volker; Windorfer, Harald; Hans, Volker

doi:10.1016/s0263-2241(00)00041-5

Cited by 17 publications

(14 citation statements)

References 2 publications

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“…In the last 15 years different flow meters have been developed for direct exhaust gas flow measurement, such as ultrasonic, turbine, vortex type, and differential pressure flow meters [8,[20][21][22]29,[34][35][36][37]42]. Ultrasonic flow meters, are among the most effective to flow measure even if pulsating or backflow is present [29], but have some disadvantages because they are affected by the temperature, density and viscosity of the fluid [35,37].…”

Section: Introductionmentioning

confidence: 99%

“…Ultrasonic flow meters, are among the most effective to flow measure even if pulsating or backflow is present [29], but have some disadvantages because they are affected by the temperature, density and viscosity of the fluid [35,37]. Different techniques have been developed to overcome these problems like the work developed at the University of Leoben [16] [17,18] and the flow meter developed by AVL [3,19].…”

Section: Introductionmentioning

confidence: 99%

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Methodology for instantaneous average exhaust gas mass flow rate measurement

Fonseca

Kindelán

Martí

et al. 2016

Flow Measurement and Instrumentation

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AB5TRACTThis paper presents a new methodology for measurement of the instantaneous average exhaust mass flow rate in reciprocating internal combustion engines to be used to determinate real driving emissions on light duty vehicles, as part of a Portable Emission Measurement 5ystem (PEM5). Firstlya flow meter, named MIVECO flow meter, was designed based on a Pitot tube adapted to exhaust gases which are characterized by moisture and particle content, rapid changes in flow rate and chemical composition, pulsating and reverse flow at very low engine speed. Then, an off-line methodology was developed to calculate the instantaneous average flow, considering the "square root error" phenomenon. The paper includes the theoretical fundamentals, the developed flow meter specifications, the calibration tests, the description of the proposed off-line methodology and the results of the validation test carried out in a chassis dynamometer, where the validity of the mass flow meter and the methodology developed are demonstrated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Methodology for instantaneous average exhaust gas mass flow rate measurement

Fonseca

Kindelán

Martí

et al. 2016

Flow Measurement and Instrumentation

View full text Add to dashboard Cite

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“…The measurement and imaging of two-phase flows have received much attention recently. Several techniques have already been used and developed to analyze the phenomena in two-phase flow, including high-speed videometry [2], capacitive probes [3] and ultrasound [4], X-ray tomographic imaging [5] and impedanciometry [6]. High-speed videometry offers many interesting characteristics for laboratories essays, such as non-invasiveness, advances in instrumentation technology and signal processing algorithms [7].…”

Section: Introductionmentioning

confidence: 99%

Bubble Identification Based on High Speed Videometry Data: Algorithm and Validation

Amaral

Alves

Silva

et al. 2012

Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications

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Abstract. The simultaneous flow of gas and liquid in a pipe is commonly found in several industrial activities, such as crude oil extraction and processing. In order to analyze this (two-phase) flow, many measurement techniques have been proposed, including X-ray, ultrasound, impedance and optical measurement. In this context, although the high speed videometry use is limited in practical cases, it is an important tool to validate other methods in experimental essays. Approaches based on image segmentation have already been considered to analyze gas-liquid flows along vertical pipes, but just a few have focused horizontal experiments, which are also widely found in many applications. This article describes a new technique developed to automatically measure the bubble volume through video analysis. The tests carried out considering horizontal air-water flow images yielded results with good correlation with known volume data, thus showing that the measurements are accurate enough to be considered for the validation of other technologies.

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“…There is a pulsating flow used to enhance the combustion performance and to get a complete mixing between the fuel and air in the combustor. Numbers of researches have been studied theoretically and experimentally the behavior of the compressible pulsating flow behavior and its effect on the combustion performance [5,11,12,13,18,19]. Another researchers have investigated the behavior of two phase pulsating flow such as in the manifold prior the combustion chamber [13].…”

Section: Introductionmentioning

confidence: 99%

Review of Compressible Pulsating Flow Effects on System Performance

Metwally

2009

International Conference on Aerospace Sciences and Aviation Tec

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Pulsating flow is as old as the human being. It appears in different forms from a compressible to incompressible, one phase, two or multi phase flows. Some forms of pulsating flow are favorable like that increase the combustion efficiency in combustors. Other forms of pulsating flow are harmful such as pulsation associated with compressor surge leading to increase of the noise level. Understanding the behavior of the pulsating flow in different forms, its effects on the flow system performance and on the gas turbine engine cooling system are reviewed. Reynolds number, velocity gradient, pressure gradient and frequency are the main parameters that affecting the pulsating flow behavior. The measurement of pulsating flow in its forms is one of the major tasks of the researchers. From the review it appears that number of researches tried to cover the whole sides of pulsating flow phenomena and the different ways to measure it. However, a lot of works is still needed to be understood thoroughly the effect of pulsating flow on the flow systems and how it could be used to developed the performance.

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Measuring pulsating flow with ultrasound

Cited by 17 publications

References 2 publications

Methodology for instantaneous average exhaust gas mass flow rate measurement

Methodology for instantaneous average exhaust gas mass flow rate measurement

Bubble Identification Based on High Speed Videometry Data: Algorithm and Validation

Review of Compressible Pulsating Flow Effects on System Performance

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