Journal articles: 'Flow measurement method'

1

Dutillet, Jean-Louis. "Flow measurement: the dilution method." Flow Measurement and Instrumentation 4, no. 1 (January 1993): 51–52. http://dx.doi.org/10.1016/0955-5986(93)90011-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Nishiahra, Kazuyoshi, Charles W. Knisely, Yusuke Nakahata, Yasushi Sasaki, and Manabu Iguchi. "OS8-1-1 Measurement method of three dimensional flow through descriptive geometry." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2007.6 (2007): _OS8–1–1–1—_OS8–1–1–5. http://dx.doi.org/10.1299/jsmeatem.2007.6._os8-1-1-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Watanabe, Noriyuki. "Flow measurement method and it's characteristic." Japan journal of water pollution research 10, no. 10 (1987): 582–88. http://dx.doi.org/10.2965/jswe1978.10.582.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

KATAKURA, Kageyoshi, and Motoyoshi OKUJIMA. "METHOD FOR ULTRASONIC FLOW VECTOR MEASUREMENT." Journal of the Visualization Society of Japan 13, Supplement1 (1993): 119–22. http://dx.doi.org/10.3154/jvs.13.supplement1_119.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Kovtun, S. N., A. I. Mogil'ner, S. A. Morozov, Yu P. Trubakov, and A. Yu Uralets. "Spectral method of flow-velocity measurement." Soviet Atomic Energy 60, no. 3 (1986): 265–67. http://dx.doi.org/10.1007/bf01132318.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Gommer, Frank, Stepan Lomov, Kelly Vandenbosche, and Ignace Verpoest. "Error Assessment in Permeability Measurement Using Radial Flow Method." Advanced Composites Letters 18, no. 4 (July 2009): 096369350901800. http://dx.doi.org/10.1177/096369350901800402.

Full text

Abstract:

Permeability values measured on textile reinforcements with different methods or different test set-ups can differ significantly from each other. Even measurements preformed on the same test set-up can have a substantial scatter of measured permeability values. This paper discusses the sources of possible measurement errors for a radial flow set-up and their influence on the measured permeability results. Suggestions are given to improve the reliability of permeability measurements.

APA, Harvard, Vancouver, ISO, and other styles

7

Dindorf, Ryszard, and Piotr Wos. "Indirect Method of Leakage Flow Rate Measurement in Compressed Air Pipelines." Applied Mechanics and Materials 630 (September 2014): 288–93. http://dx.doi.org/10.4028/www.scientific.net/amm.630.288.

Full text

Abstract:

The paper deals with new indirect methods of leakage flow rate measurement in compressed air pipelines. In this method the measurement equipment has branch connection to the pipeline. The measurement method consists in determining the relation between air leakage flow rate in pipeline and the controlled air flow rate through adjustable throttle valve. Compressed air leakage flow rate in pipeline is calculated on the basis of pressure ratio measurements in two time intervals - during leakage without the controlled flow and with the controlled flow in branch line. The controlled air flow through the throttle valve is directly measured by flow meter.

APA, Harvard, Vancouver, ISO, and other styles

8

Patel, Dhara, and Saurabh Upadhyay. "Optical Flow Measurement using Lucas Kanade Method." International Journal of Computer Applications 61, no. 10 (January 18, 2013): 6–10. http://dx.doi.org/10.5120/9962-4611.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Zhao, Ran, and Ping Sun. "Deformation-phase measurement by optical flow method." Optics Communications 371 (July 2016): 144–49. http://dx.doi.org/10.1016/j.optcom.2016.03.075.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Nashima, Takeshi. "Method of Viscoelasticity Measurement under Shear-Flow." Nihon Reoroji Gakkaishi 48, no. 5 (December 15, 2020): 251–57. http://dx.doi.org/10.1678/rheology.48.251.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Abramovich-Sivan, Sarit, Vili Benary, Thalia Kaspi, and Solange Akselrod. "A Combined Heat Clearance Method for Tissue Blood Flow Measurement." Journal of Biomechanical Engineering 113, no. 4 (November 1, 1991): 438–45. http://dx.doi.org/10.1115/1.2895424.

Full text

Abstract:

Tissue Blood Flow is measured by applying a combined procedure of two independent approaches based on heat clearance: the Pulse Decay Method and the Continuous Method. The Pulse Method allows absolute assessment of tissue BF with no need for calibration, and can be applied only if the tissue BF is steady during the period of measurement. On the other hand, the Continuous Method enables the observation of rapid changes in tissue BF, and can be applied under non steady-state conditions. Using the combined method, a continuous quantitative measurement of transient changes in tissue BF can be obtained. For this purpose, we have developed two experimental systems consisting of independent electronic units: a Pulse Unit and a Continuous Unit. A micro-computer with dedicated software controls the operation of the electronic units and calculates tissue BF on-line. In vitro measurements are performed and demonstrate the reliability of the methods. In vivo measurements in rat brain tissue are also performed and include physiological and pharmacological changes of local tissue BF. The results of the two heat clearance methods correlate well with tissue BF values measured by a third independent method, the Hydrogen Clearance Method.

APA, Harvard, Vancouver, ISO, and other styles

12

Sun, Aodi, Leilei Qiu, and Xinyu Wei. "Flow measurement method of complex flow in heat exchange casing." Flow Measurement and Instrumentation 76 (December 2020): 101812. http://dx.doi.org/10.1016/j.flowmeasinst.2020.101812.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

TREENUSON, Weerachon, Nobuyoshi TSUZUKI, and Hiroshige KIKURA. "B225 Development of Flow Rate Measurement in the Bent Pipe using Ultrasonic Velocity Profile method." Proceedings of the National Symposium on Power and Energy Systems 2012.17 (2012): 291–94. http://dx.doi.org/10.1299/jsmepes.2012.17.291.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

MEDEIROS, K. A. R., C. R. H. BARBOSA, and E. C. de OLIVEIRA. "NON-INTRUSIVE METHOD FOR MEASURING WATER FLOW RATE IN PIPE." Periódico Tchê Química 14, no. 27 (January 20, 2017): 44–50. http://dx.doi.org/10.52571/ptq.v14.n27.2017.44_periodico27_pgs_44_50.pdf.

Full text

Abstract:

The transducer most widely used for vibration measurement is the piezoelectric accelerometer. This application has been explored for flow rate measurement, since some studies have verified the narrow correlation between ratio of flow and vibration. The technique consists of measure the vibration induced by the flow in the pipeline, has been considered as promising, in the sense of enabling the development of a sensor that presents advantageous characteristics such as non-intrusiveness, non-invasiveness and reduced cost. This paper shows the method of measurement of flow in pipe based on vibration caused by transit of water, without the need of flow interruption or opening of pipe for installation of water meters. Further are present experimental measurements and metrological validation in laboratory accredited for calibration of flow meters.

APA, Harvard, Vancouver, ISO, and other styles

15

Huang, Liang, Mao Lin Cai, and Jia Wei Wang. "New Method for Pipeline Leakage Measurement in Pneumatic Industry." Applied Mechanics and Materials 34-35 (October 2010): 795–800. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.795.

Full text

Abstract:

The objective of work proposed in this paper is to propose a new method of measuring gas leakage for pneumatic industry. Compared with traditional flow measurements, equipment using this method can be connected to the pipeline in parallel. The measurement is enabled by employing a standard flow. Standard flow is used to determine the internal volume of the measured equipment. An algorithm is formulated to describe, to the extent possible, the relationship between gas leakage and standard flow. This paper also proposes a pressure differentiator that contains a slit-type laminar flow element. The measurement deviates from the theoretical leakage values by less than 5%, and shows a good precision and scope. In addition, the proposed parallel connection based on standard flow makes easy operation and fast measuring possible, thus promising new area of application for pneumatic equipments.

APA, Harvard, Vancouver, ISO, and other styles

16

Kiss, Katalin, and Miklós Patziger. "Statistical analysis of fine resolution flow datasets helps characterizing flow behaviour in primary clarifiers: a decision support method." Water Practice and Technology 16, no. 2 (February 4, 2021): 420–35. http://dx.doi.org/10.2166/wpt.2021.006.

Full text

Abstract:

Abstract In situ measurement campaigns of primary clarifiers are rarely implemented properly because of their cost, time, and energy demand. Hydrodynamic modelling possibilities for such reactors have been intensely examined recently, but on-site factors affecting flow characteristics (e.g. flow distributors) have not received sufficient attention. This paper describes the use of ANOVA in examining fine resolution flow datasets and the related decision support method for in situ measurement campaigns and subsequent modelling processes. The characteristics of the flow and the applicability of 2D and 3D methods to investigate hydrodynamic features are discussed through the example of a rectangular primary clarifier, also considering the reproducibility of measurements ranging from typical nominal flow rates to peak loads. Based on the data, recommendations are provided on the adequate sizing of a measurement campaign, potentially reduced to a single longitudinal section (2D measurement). According to our results, performing hydrodynamic measurements with a 2D-arrangement of measuring points is sufficient in the case of such clarifiers, also with regard to the design processes. When applying the described methods, the related efforts and costs may be reduced and estimated more easily. However, care should be taken when applying this method to determine the spacing of measuring points correctly.

APA, Harvard, Vancouver, ISO, and other styles

17

Vass, Sándor, and Máté Zöldy. "A model based new method for injection rate determination." Thermal Science, no. 00 (2020): 159. http://dx.doi.org/10.2298/tsci190417159v.

Full text

Abstract:

This paper presents a detailed model of a Common Rail Diesel injector and its validation using injection rate measurement. A new method is described for injector nozzle flowrate determination using simulation and measurement tools. The injector model contains fluid dynamic, mechanic and electro-magnetic systems, describing all-important internal processes and also includes the injection rate meter model. Injection rate measurements were made using the W. Bosch method, based on recording the pressure traces in a length of fuel during injections. Comparing the results of the simulated injection rate meter, simulated injector orifice flow and injection rate measurements, the simulated and measured injection rates showed good conformity. In addition to this, the difference between nozzle flow rate and the measured flow rate is pointed out in different operating points, proving, that the results of a Bosch type injection rate measurements cannot be directly used for model validation. However, combining injector, injection rate meter simulation and measurement data, the accurate nozzle flow rate can be determined, and the model validated.

APA, Harvard, Vancouver, ISO, and other styles

18

MURAMATSU, Ei, Hideki MURAKAWA, Katsumi SUGIMOTO, Nobuyuki TAKENAKA, and Noriyuki FURUICHI. "ICOPE-15-1040 A new method for high flow rate measurement using ultrasonic multi-wave pulsed Doppler method with staggered trigger." Proceedings of the International Conference on Power Engineering (ICOPE) 2015.12 (2015): _ICOPE—15——_ICOPE—15—. http://dx.doi.org/10.1299/jsmeicope.2015.12._icope-15-_27.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Zhu, Shou Xin, Wen Jun Hu, Hui Meng Zheng, and Satoshi Takahashi. "Experimental Study on Measurement Method of Flow Electrification." Applied Mechanics and Materials 43 (December 2010): 303–7. http://dx.doi.org/10.4028/www.scientific.net/amm.43.303.

Full text

Abstract:

When a relative motion occurring between liquid and solid, electric charges with opposite signs come out separately on each side by friction which phenomena is called flow electrification. As the amount of charge generated by flow electrification is small, and part of which neutralize each other at the same time, the test method of flow electrification becomes one of discussion topics for scientists of all countries. This paper introduces an experimental measurement method of flow electrification, which is a comparative method by inserting electrodes in pipelines, and acquisition amplifier circuit, with high resolution and strong anti-jamming ability. Experiments show that the measurement method could be applied to system testing for flow electrification.

APA, Harvard, Vancouver, ISO, and other styles

20

Purwaningsih, Ratna, Susatyo Nugroho Widyo Pramono, Farhan Atoilah, Aan Aria Nanda, and Azizah Dewi Suryaningsih. "Design of testing Method of Fuels Filling Measurement Instrument." E3S Web of Conferences 202 (2020): 11001. http://dx.doi.org/10.1051/e3sconf/202020211001.

Full text

Abstract:

In this paper we have proposed a technique as a testing method for the instrument of measuring the amount of fuel filled in motorbike fuel tank. The instrument used a fluid flow meter that can be used easily by consumers to check the accuracy of gas station filler gauge. The study aims to develop a prototype of fluid flow measurement devices and a digital reporting system through IoT. The research phase consists of designing a fluid flow equipment, designing a color detection device, and designing a reporting system with IoT. Reporting application uses the smartphone system as a display of measurement results from flow meters and color detectors. Testing the function of the accuracy of the flow sensor on the tool is done by using a calibration factor. The output of measurements are fuel volume discharge, type of fluid and the result are shown on smartphone which connected to the internet for its reporting system.

APA, Harvard, Vancouver, ISO, and other styles

21

Hobeika, Teddy, Peter Gullberg, Simone Sebben, and Lennart Lofdahl. "Force Based Measurement Method for Cooling Flow Quantification." SAE International Journal of Passenger Cars - Mechanical Systems 10, no. 2 (March 28, 2017): 619–27. http://dx.doi.org/10.4271/2017-01-1520.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

YOON, MyungKeun. "A New Method for Per-Flow Traffic Measurement." IEICE Transactions on Communications E94-B, no. 8 (2011): 2386–89. http://dx.doi.org/10.1587/transcom.e94.b.2386.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

KIRITA, Atsushi, and Kin-ichi KOMIYA. "Flow Measurement by the Reformed Salt Dilution Method." Transactions of the Society of Instrument and Control Engineers 21, no. 5 (1985): 475–79. http://dx.doi.org/10.9746/sicetr1965.21.475.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Білинський, Йосип Йосипович, and Микола Володимирович Гладишевський. "Ultrasonic method development of fluid flow velocity measurement." Technology audit and production reserves 4, no. 1(24) (July 23, 2015): 19. http://dx.doi.org/10.15587/2312-8372.2015.46985.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Fuks, Joseph, and Konstantin Naugolnykh. "Multi‐frequency scintillation method for ocean flow measurement." Journal of the Acoustical Society of America 106, no. 4 (October 1999): 2119–20. http://dx.doi.org/10.1121/1.427974.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

WADA, Sanehiro, Hiroshige KIKURA, Masanori ARITOMI, Yasushi TAKEDA, and Michitsugu MORI. "Multiline flow rate measurement using ultrasonic Doppler method." Proceedings of the Fluids engineering conference 2003 (2003): 32. http://dx.doi.org/10.1299/jsmefed.2003.32.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Nohmi, Motohiko, and Juan G. Santiago. "341 Quick Measurement Method of Electroosmotic Flow Velocity." Proceedings of the JSME annual meeting 2008.8 (2008): 81–82. http://dx.doi.org/10.1299/jsmemecjo.2008.8.0_81.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Fuks, I., M. Charnotskii, and K. Naugolnykh. "A multifrequency scintillation method for ocean flow measurement." Journal of the Acoustical Society of America 109, no. 6 (June 2001): 2730–38. http://dx.doi.org/10.1121/1.1369099.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Budai, Ana Maria, Adrian Cuzmos, Cristian Fanica, Damaschin Pepa, Cosmin Ursoniu, and Viorel Constantin Campian. "Flow Measurement to a Kaplan Turbine Using a Direct Method and an Indirect One." Applied Mechanics and Materials 823 (January 2016): 361–66. http://dx.doi.org/10.4028/www.scientific.net/amm.823.361.

Full text

Abstract:

The paper present two different methods for measuring flow in hydropower, one direct and one indirect method. The study consists in comparing the results obtained by measurements made by both methods in a Romanian hydropower plant. The indirect method used is the Winter-Kennedy method. The other method involves direct measurement of the flow rate of water using a specialized outfit in this.

APA, Harvard, Vancouver, ISO, and other styles

30

Hieda, Ichiro, Yasuo Kuchinomachi, Sigeru Sato, and Hiroyuki Kodama. "Impedance Mapping Method and System for Blood Flow Measurement in Brain." Journal of Robotics and Mechatronics 4, no. 4 (August 20, 1992): 314–20. http://dx.doi.org/10.20965/jrm.1992.p0314.

Full text

Abstract:

The authors have been engaged in the development of a brain blood flow mapping system based on the impedance technique which is more convenient and economical than the existing observation systems of blood flow in brain using radioisotopes or various types of CTs. This system is capable of non-invasive measurements and suitable for screening examinations of stroke in group examinations. A prototype system has recently been completed. This paper examines how sensitively changes in the resistivity of the internal tissue of a head affects voltage readings in impedance measurement, which results in the creation of grid-electrodes. The paper then introduces the prototype system, focusing mainly on the principle of impedance measurement using the new grid-electrodes and also on analysis of data.

APA, Harvard, Vancouver, ISO, and other styles

31

Li, Yingwei, Jing Gao, Xingbin Liu, and Ronghua Xie. "Energy Demodulation Algorithm for Flow Velocity Measurement of Oil-Gas-Water Three-Phase Flow." Mathematical Problems in Engineering 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/705323.

Full text

Abstract:

Flow velocity measurement was an important research of oil-gas-water three-phase flow parameter measurements. In order to satisfy the increasing demands for flow detection technology, the paper presented a gas-liquid phase flow velocity measurement method which was based on energy demodulation algorithm combing with time delay estimation technology. First, a gas-liquid phase separation method of oil-gas-water three-phase flow based on energy demodulation algorithm and blind signal separation technology was proposed. The separation of oil-gas-water three-phase signals which were sampled by conductance sensor performed well, so the gas-phase signal and the liquid-phase signal were obtained. Second, we used the time delay estimation technology to get the delay time of gas-phase signals and liquid-phase signals, respectively, and the gas-phase velocity and the liquid-phase velocity were derived. At last, the experiment was performed at oil-gas-water three-phase flow loop, and the results indicated that the measurement errors met the need of velocity measurement. So it provided a feasible method for gas-liquid phase velocity measurement of the oil-gas-water three-phase flow.

APA, Harvard, Vancouver, ISO, and other styles

32

Huang, Jiayun, Liwei Yang, Jiqin Zhang, and Hao Hu. "Granular Fertilizer Mass Flow Measurement and Vehicle Experiments Based on Microwave Doppler Method." Applied Engineering in Agriculture 37, no. 1 (2021): 135–47. http://dx.doi.org/10.13031/aea.14013.

Full text

Abstract:

HighlightsA microwave Doppler-based fertilizer mass flow measurement system was developed.The measurement system was applied in vehicle experiments.Power spectra of mass flow signal and vibration signal were obtained and analyzed.Interference suppression algorithm based on CA-CFAR reduced vibration interference.Fertilizer mass flow measurement accuracy was improved by interference suppression.Abstract. The fertilizer mass flow measurement system is typically installed on the fertilizer applicator. However, vehicle vibrations are inevitable during field operation of fertilizing equipment, and can interfere with mass flow signals, thereby affecting the accuracy of mass flow measurements. In this article, a mass flow measurement system based on the microwave Doppler method was introduced. The dominant frequency (fdot) related to fertilizer velocity and the power spectral density (PSD) related to fertilizer concentration were obtained from the Doppler signal of the granular fertilizer processed using fast Fourier transform. The product of fdot and PSD is defined as the sensor output value (SOV). The relationship between SOV, PSD, and fertilizer mass flow (FMF) was studied under vehicle conditions. The linear regression models of 22-8-10 (MOP) high-nitrogen poly-?-glutamic acid fertilizer were established using the least squares method, and the vibration signals were measured. Based on analysis of the power spectra of the mass flow and vibration signals, an interference suppression algorithm based on cell average constant false alarm rate (CA-CFAR) was presented to reduce vibration interference. To verify the performance of the novel vibration interference reduction algorithm, vehicle experiments were conducted at different tractor velocities. The results show that mass flow measurements ranged from 1300 to 3000 g min-1. It was found that using only the PSD related to concentration for flow measurement gave better measurement accuracy compared with SOV, and relative errors of the system were within 8.1%. Correlation between the PSD and FMF improved with interference suppression algorithm based on CA-CFAR. The determination coefficient increased from 0.01 to 0.92, 0.97 to 0.99, and 0.96 to 0.98 at three different tractor velocities, respectively. From the results, it was evident that the algorithm effectively eliminated vibration interference signals in vehicle conditions. In future work, the conditions of the soil will be considered and the performance of the mass flow measurement system will be tested in the field. Keywords: Fertilizer mass flow, Microwave Doppler radar, Tractor vibration, Vehicle experiment, Vibration interference suppression.

APA, Harvard, Vancouver, ISO, and other styles

33

Okada, Takashi, Yoshinori Seki, Akimitsu Harada, Shigeo Ohtsuki, and Motonao Tanaka. "1507: A New Measurement Method of Blood Flow Vector: Vector Flow Mapping." Ultrasound in Medicine & Biology 35, no. 8 (August 2009): S237. http://dx.doi.org/10.1016/j.ultrasmedbio.2009.06.894.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

MORIYAMA, Takashi, and Seiji TACHIBANA. "Mass Flow Measurement Using Heat Transfer Method for Moved Bed Gravity Flow." Transactions of the Society of Instrument and Control Engineers 31, no. 6 (1995): 722–27. http://dx.doi.org/10.9746/sicetr1965.31.722.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Werzner, E., S. Ray, and D. Trimis. "Proposed method for measurement of flow rate in turbulent periodic pipe flow." Journal of Physics: Conference Series 318, no. 2 (December 22, 2011): 022044. http://dx.doi.org/10.1088/1742-6596/318/2/022044.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Harel, François, Jocelyn Dupuis, Ahmed Benelfassi, Nathalie Ruel, and Jean Grégoire. "Radionuclide plethysmography for noninvasive evaluation of peripheral arterial blood flow." American Journal of Physiology-Heart and Circulatory Physiology 289, no. 1 (July 2005): H258—H262. http://dx.doi.org/10.1152/ajpheart.01021.2004.

Full text

Abstract:

We validated a noninvasive radionuclide plethysmography technique to evaluate peripheral arterial blood flow during reactive hyperemia. This method, based on the measurement of blood volume variations during repetitive venous occlusions, was compared with strain-gauge venous impedance plethysmography. The technique uses 99mTc-labeled autologous red blood cells scintigraphy to determine the rate of change of forearm scintigraphic counts during venous occlusion. Thirteen subjects were simultaneously evaluated with radionuclide and impedance plethysmography. Six baseline flow measurements were performed to evaluate the reproducibility of each method. Twenty-seven serial measurements were then made to evaluate flow variation during forearm reactive hyperemia. After 30 min of recovery, resting forearm blood flows were again evaluated. Impedance and radionuclide methods showed excellent reproducibility with intraclass correlation coefficients of 0.96 and 0.93, respectively. There was also good correlation of flows between both methods during reactive hyperemia ( r = 0.87). Resting flows at 30 min after reactive hyperemia were slightly lower than at baseline with both methods. We conclude that radionuclide plethysmography could be used for the noninvasive evaluation of forearm blood flow and its dynamic variations during reactive hyperemia.

APA, Harvard, Vancouver, ISO, and other styles

37

Baidar, Binaya, Jonathan Nicolle, Bhupendra K. Gandhi, and Michel J. Cervantes. "Numerical Study of the Winter–Kennedy Flow Measurement Method in Transient Flows." Energies 13, no. 6 (March 11, 2020): 1310. http://dx.doi.org/10.3390/en13061310.

Full text

Abstract:

This paper explores the possibility of using the Winter–Kennedy (WK) method for transient flow rate measurement in hydraulic turbines. Computational fluid dynamic (CFD) analysis of a numerical model of an axial turbine was carried out for accelerating and decelerating flows. Those were obtained by linearly opening and closing of the guide vanes, respectively, while retaining the inlet pressure constant during the simulations. The behavior of several WK configurations on a cross-sectional plane and along the azimuthal direction of the spiral casing was studied during the transients. The study showed that there are certain WK configurations that are more stable than others. The physical mechanism behind the stability (or instability) of the WK method during transients is presented. Using the steady WK coefficient obtained at the best efficiency point (BEP), the WK method could estimate the transient flow rate with a deviation of about 7.5% and 3.5%, for accelerating and decelerating flow, respectively.

APA, Harvard, Vancouver, ISO, and other styles

38

Dayev, Zhanat А., Gulzhan E. Shopanova, and Bakytgul А. Toksanbaeva. "Invariant method for measuring wet gas flow rate." Izmeritel`naya Tekhnika, no. 6 (2021): 13–19. http://dx.doi.org/10.32446/0368-1025it.2021-6-13-19.

Full text

Abstract:

The article deals with one of the important tasks of modern flow measurement, which is related to the measurement of the flow rate and the amount of wet gas. This task becomes especially important when it becomes necessary to obtain information about the separate amount of the dry part of the gas that is contained in the form of a mixture in the wet gas stream. The paper presents the principle of operation and structure of the invariant system for measuring the flow rate of wet gas, which is based on the combined use of differential pressure flowmeters and Coriolis flowmeters. The operation of the invariant wet gas flow rate measurement system is based on the simultaneous application of the multichannel principle and the partial flow measurement method. Coriolis flowmeters and the differential pressure flowmeter are used as the main elements of the system. The proposed measurement system does not offer applications for gases with abundant drip humidity. The article provides information about the test results of the proposed invariant system. The estimation of the metrological characteristics of the invariant system when measuring the flow rate of wet gas is given. The obtained test results of the invariant wet gas flow rate measurement system are relevant for natural gas production, transportation, and storage facilities.

APA, Harvard, Vancouver, ISO, and other styles

39

Wang, Zheng Xian, Bao Ren Guo, Min Zhang, Jian Yong Yang, and Li Liu. "Thermal Power Plant Circulating Water Flow Measurement Method Research." Applied Mechanics and Materials 316-317 (April 2013): 1143–46. http://dx.doi.org/10.4028/www.scientific.net/amm.316-317.1143.

Full text

Abstract:

This paper given an online flow measurement method of large diameter pipe and low-head. This method can be applied to measure circulating water flow of thermal power plant. The characteristics of method is that: the measuring device adapted the method to solve the problem of the online flow measurement of circulating water, and to provide the necessary operating parameters for optimal operation of the unit cold-end system.

APA, Harvard, Vancouver, ISO, and other styles

40

Tomaszewska-Wach, Barbara, and Mariusz Rzasa. "A Correction Method for Wet Gas Flow Metering Using a Standard Orifice and Slotted Orifices." Sensors 21, no. 7 (March 25, 2021): 2291. http://dx.doi.org/10.3390/s21072291.

Full text

Abstract:

Flow measurements that utilize differential pressure meters are commonly applied in industry. In such conditions, gas flow is often accompanied by liquid condensation. For this reason, errors occur in the metering process that can be attributed to the fluctuations in continuous phase parameters in the flow. Furthermore, the occurrence of a dispersed phase results in flow disturbance and dynamic pressure pulsations. For the above reasons, new methods and tools are sought with the purpose of performing measurements of gas-liquid flows providing measurement results that can be considered as fairly accurate in the cases when flow involves a liquid phase form. The paper reports the results of a study involving measurement of wet gas flow using differential pressure flowmeters. The experiments were conducted for three constant mass air flow rates equal to 0.06, 0.078 and 0.086 kg/s. After stabilization of the air flow rates, water was fed into the pipe with flow rates in the range from 0.01 to 0.16 kg/s. The research involved a standard orifice and three types of slotted orifices with various slot arrangements and geometries. The analysis focused on the effect of orifice geometry on the flow metering results. On the basis of the results, it was found that the slotted orifice generates smaller differential pressure values compared to the standard orifice. The water mass fraction in the gas leads to overestimated results of measurements across the flowmeter. Regardless of the type of the orifice, is necessary to undertake a correction of the results. The paper proposes a method of gas mass flow correction. The results were compared with the common over-reading correction models available in the literature.

APA, Harvard, Vancouver, ISO, and other styles

41

Kato, Haruhisa, and Ayako Nakamura. "Particle density determination using resonant mass measurement method combined with asymmetrical flow field-flow fractionation method." Journal of Chromatography A 1631 (November 2020): 461557. http://dx.doi.org/10.1016/j.chroma.2020.461557.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

de Korte, Kees, and Peter Smits. "Steady State Measurement of Oxygenation Capacity." Water Science and Technology 17, no. 2-3 (February 1, 1985): 303–11. http://dx.doi.org/10.2166/wst.1985.0139.

Full text

Abstract:

The usual method for OC measurement is the non-steady state method (reaeration) in tapwater or, sometimes, in activated sludge. Both methods are more or less difficult and expensive. The steady state method with activated sludge is presented. Fundamentals are discussed. For complete mixed aeration tanks, plug flow systems with diffused air aeration and carousels the method is described more in detail and the results of measurements are presented. The results of the steady state measurements of the diffused air system are compared with those of the reaeration method in tapwater. The accuracy of the measurements in the 3 systems is discussed. Measurements in other aeration systems are described briefly. It is concluded that the steady state OC measurement offers advantages in comparison with the non-steady state method and is useful for most purposes.

APA, Harvard, Vancouver, ISO, and other styles

43

Edwards, A. D., C. Richardson, P. van der Zee, C. Elwell, J. S. Wyatt, M. Cope, D. T. Delpy, and E. O. Reynolds. "Measurement of hemoglobin flow and blood flow by near-infrared spectroscopy." Journal of Applied Physiology 75, no. 4 (October 1, 1993): 1884–89. http://dx.doi.org/10.1152/jappl.1993.75.4.1884.

Full text

Abstract:

A noninvasive method of measuring hemoglobin flow through an organ by near-infrared spectroscopy (NIRS) is described that allows blood flow to be calculated. The method is derived from the Fick principle and uses a small change in arterial oxyhemoglobin concentration (brought about by a change in the fractional inspired O2 concentration) as an intravascular tracer. Changes in deoxyhemoglobin and oxyhemoglobin concentrations are quantified by monitoring variations in the absorption of near-infrared light in the organ, thus providing a measure of tracer accumulation. The tracer input function is calculated from the change in arterial O2 saturation, measured by pulse oximetry. The method was used to determine hemoglobin flow in the forearms of six healthy young adults on 10 occasions. Forearm hemoglobin flow ranged from 22.5 to 82.6 mumol.l-1.min-1. Calculated forearm blood flow ranged from 1.01 to 4.01 ml.100 g-1.min-1. For comparison, forearm blood flow was measured by venous occlusion plethysmography, and the relation between flow calculated by NIRS (y) and plethysmography (x) was y = 0.93x + 0.30 (r2 = 0.95). The mean difference between the methods was 0.14 ml.100 g-1.min-1. The technique may be widely applicable.

APA, Harvard, Vancouver, ISO, and other styles

44

TSUSHIMA, Kensuke, Hiromasa KASHIMURA, Akira NAKAHARA, Hisayuki FUKUTOMI, and Hitoshi FUJII. "Laser Speckle Method: Application for Measurement of blood flow." JOURNAL OF JAPAN SOCIETY FOR LASER SURGERY AND MEDICINE 15, no. 3 (1994): 7–12. http://dx.doi.org/10.2530/jslsm1980.15.3_7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Steele, J. E., S. Skarlatos, P. H. Brand, P. J. Metting, and S. L. Britton. "Gravimetric Method for the Dynamic Measurement of Urine Flow." Experimental Biology and Medicine 204, no. 1 (October 1, 1993): 70–74. http://dx.doi.org/10.3181/00379727-204-43636.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Fuchino, Shuichiro, and Noriharu Tamada. "Development of a Flow Measurement Method Using Ionic Tracer." IEEJ Transactions on Fundamentals and Materials 110, no. 11 (1990): 812–16. http://dx.doi.org/10.1541/ieejfms1990.110.11_812.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Laval, Jorge A. "Hysteresis in traffic flow revisited: An improved measurement method." Transportation Research Part B: Methodological 45, no. 2 (February 2011): 385–91. http://dx.doi.org/10.1016/j.trb.2010.07.006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Zhu, Hai-Lin, and Zou Min. "A New Simple Non-Invasive Method for Flow Measurement." Measurement and Control 32, no. 6 (July 1999): 178–80. http://dx.doi.org/10.1177/002029409903200604.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Sumanaweera, Thilaka S., and Patrick J. Phillips. "Ultrasonic system and method for measurement of fluid flow." Journal of the Acoustical Society of America 111, no. 4 (2002): 1510. http://dx.doi.org/10.1121/1.1479045.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Zhang, Shuang Yu, Zhi Nan Wang, Xue Di Hao, and Miao Wu. "Flow Rate Measurement Method and Apparatus of Thick Pastes." Advanced Materials Research 605-607 (December 2012): 945–50. http://dx.doi.org/10.4028/www.scientific.net/amr.605-607.945.

Full text

Abstract:

Research on the rheological characteristics and delivery resistance needs precise flow rate in pipes of thick pastes which is the basis of delivery capacity calculation and equipment selection for a pipeline system. However, the existing apparatuses are not suitable for flow rate measurement of the thick pastes, so it is necessary to design a kind of apparatus applicable to the above requirements. This paper by using an electromagnetic induction coil as a sensor, designs a kind of flow rate measurement apparatus of thick pastes. It describes the measurement method and its principle, and analyzes the error of this apparatus. A loop-pipe transportation test of coal slime was conducted, and it shows the relative test experimental error of this apparatus is less than 1%.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Flow measurement method'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles