Flow measurement plays an important role in industrial production, process control and energy utilization. The steam flow is affected by the state of steam properties and the design of the steam flowmeter during the measurement process, resulting in low measurement accuracy. Based on the combined measurement method of differential pressure flowmeter and vortex flowmeter, an integrated flow measurement device that integrates averaging-velocity tube and piezoelectric vortex flowmeter is proposed in this paper. It combines the structural features and advantages of the two flowmeters scientifically. In this paper, the differential pressure transmitter is used to detect the pressure difference on both sides of the cylinder. Due to fluid vibration and piezoelectric effect, the probe in the device generates regular vibration. And combined with Digital Signal Processing (DSP) technology and automatic frequency band adjustment method, the flexibility and stability of frequency signal processing are improved. The measurement performance of the device was evaluated in this paper. The experimental results show that the absolute value of the relative error of the device is within 1.00% and 1.50% under the conditions of single-phase water and single-phase gas, respectively. The device can achieve dual-signal measurement, and it has the advantages of wide applicability, good stability and strong anti-interference, which will provide a new design idea for the measurement of saturated wet steam.
{"title":"A New Type of Flow Measurement Device","authors":"Y. Liu, Lide Fang","doi":"10.21014/tc9-2022.037","DOIUrl":"https://doi.org/10.21014/tc9-2022.037","url":null,"abstract":"Flow measurement plays an important role in industrial production, process control and energy utilization. The steam flow is affected by the state of steam properties and the design of the steam flowmeter during the measurement process, resulting in low measurement accuracy. Based on the combined measurement method of differential pressure flowmeter and vortex flowmeter, an integrated flow measurement device that integrates averaging-velocity tube and piezoelectric vortex flowmeter is proposed in this paper. It combines the structural features and advantages of the two flowmeters scientifically. In this paper, the differential pressure transmitter is used to detect the pressure difference on both sides of the cylinder. Due to fluid vibration and piezoelectric effect, the probe in the device generates regular vibration. And combined with Digital Signal Processing (DSP) technology and automatic frequency band adjustment method, the flexibility and stability of frequency signal processing are improved. The measurement performance of the device was evaluated in this paper. The experimental results show that the absolute value of the relative error of the device is within 1.00% and 1.50% under the conditions of single-phase water and single-phase gas, respectively. The device can achieve dual-signal measurement, and it has the advantages of wide applicability, good stability and strong anti-interference, which will provide a new design idea for the measurement of saturated wet steam.","PeriodicalId":62400,"journal":{"name":"流量控制、测量及可视化(英文)","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79529181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Numerical Study on the Influence of Temperature on the Measurement Performance of liquid lead-bismuth_x005f_x0002_eutectic (LBE) Electromagnetic-flowmeter","authors":"Xuejing Li, Xinhong Yao, Haiyang Li","doi":"10.21014/tc9-2022.023","DOIUrl":"https://doi.org/10.21014/tc9-2022.023","url":null,"abstract":"","PeriodicalId":62400,"journal":{"name":"流量控制、测量及可视化(英文)","volume":"106 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75746454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Probe into methods about the comparison of gas flowmeters","authors":"Dannal Cheng, Feng Gao, Junfeng Mao, Shih-Huang Wu, Xinli Dong, Han Zhang, Qian Zhang","doi":"10.21014/tc9-2022.086","DOIUrl":"https://doi.org/10.21014/tc9-2022.086","url":null,"abstract":"","PeriodicalId":62400,"journal":{"name":"流量控制、测量及可视化(英文)","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75396799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Since ultrasonic flowmeter is sensitive to the flow field. Insufficient development of the flow field such as vortex and asymmetric flow will cause deviations in the measurement results. It has become a common method to accelerate the stabilization of irregular fluids to a fully developed state by a flow conditioner. The flow conditioner is a device installed upstream of the flowmeter to accelerate the stabilization of the irregular flow field, eliminate abnormal flow, and reduce the influence of swirling flow. In practical application, the correlation between flow conditioner and flow meter model has also become an important obstacle restricting the design, compatibility and popularization of flow conditioner. It is an exploratory and meaningful work to design a universal flow conditioner and propose a flow field optimization evaluation method and other basic theories and common key technologies of flow measurement. This paper introduces the self-designed universal flow conditioner, and focuses on the flow adjustment effect evaluation method based on CFD. In order to verify the adjustment effect of the combined flow conditioner, the simulated calculation is carried out and the flow field adjustment effect is compared with that of the plate-type flow conditioner.When the inlet flow rate is 20 m/s, the simulation results show that the combined flow conditioner has excellent performance in eliminating flow field distortion at about 15D downstream the flow conditioner, while the flow velocity distribution in the axial direction can also be optimized to a fully developed symmetrical state.
{"title":"Design of Flow Conditioner and Research on Evaluation of Flow Adjustment Effect","authors":"Wenlin Chen, Chun-hong Li, Xiaoyu Li","doi":"10.21014/tc9-2022.007","DOIUrl":"https://doi.org/10.21014/tc9-2022.007","url":null,"abstract":"Since ultrasonic flowmeter is sensitive to the flow field. Insufficient development of the flow field such as vortex and asymmetric flow will cause deviations in the measurement results. It has become a common method to accelerate the stabilization of irregular fluids to a fully developed state by a flow conditioner. The flow conditioner is a device installed upstream of the flowmeter to accelerate the stabilization of the irregular flow field, eliminate abnormal flow, and reduce the influence of swirling flow. In practical application, the correlation between flow conditioner and flow meter model has also become an important obstacle restricting the design, compatibility and popularization of flow conditioner. It is an exploratory and meaningful work to design a universal flow conditioner and propose a flow field optimization evaluation method and other basic theories and common key technologies of flow measurement. This paper introduces the self-designed universal flow conditioner, and focuses on the flow adjustment effect evaluation method based on CFD. In order to verify the adjustment effect of the combined flow conditioner, the simulated calculation is carried out and the flow field adjustment effect is compared with that of the plate-type flow conditioner.When the inlet flow rate is 20 m/s, the simulation results show that the combined flow conditioner has excellent performance in eliminating flow field distortion at about 15D downstream the flow conditioner, while the flow velocity distribution in the axial direction can also be optimized to a fully developed symmetrical state.","PeriodicalId":62400,"journal":{"name":"流量控制、测量及可视化(英文)","volume":"184 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80557070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Calibration of flow devices is important in several areas of pharmaceutical, flow chemistry, HPLC and microfluidic applications, where dosage of process liquids or accurate measurement of the flow rate are important. The process-oriented liquid itself might influence the performance of the flow device. Therefore, the calibration of the flow meter or microfluidic device with the process-oriented liquid is important and performing dynamic flow profile changes to simulate any dosing process gives important insight in the behaviour of these flow devices and their accuracies under non-constant flow conditions. Therefore, METAS has developed facilities with METAS piston provers to address the issue of measuring with process-oriented liquids non-constant flow profiles for flow rates down to 20 nL/min. The stated measurement uncertainties for the constant flow rate and for the dynamic flow profile changes are 1 % and 2 % at 20 nL/min. The piston provers, the new developed capillary beaker for the gravimetric reference method, validation measurements as well as response time characterization with incompressible and compressible liquids are discussed in this paper.
{"title":"Dynamic vs constant liquid flow calibrations down to 20 nL/min","authors":"H. Bissig, M. de Huu","doi":"10.21014/tc9-2022.135","DOIUrl":"https://doi.org/10.21014/tc9-2022.135","url":null,"abstract":"Calibration of flow devices is important in several areas of pharmaceutical, flow chemistry, HPLC and microfluidic applications, where dosage of process liquids or accurate measurement of the flow rate are important. The process-oriented liquid itself might influence the performance of the flow device. Therefore, the calibration of the flow meter or microfluidic device with the process-oriented liquid is important and performing dynamic flow profile changes to simulate any dosing process gives important insight in the behaviour of these flow devices and their accuracies under non-constant flow conditions. Therefore, METAS has developed facilities with METAS piston provers to address the issue of measuring with process-oriented liquids non-constant flow profiles for flow rates down to 20 nL/min. The stated measurement uncertainties for the constant flow rate and for the dynamic flow profile changes are 1 % and 2 % at 20 nL/min. The piston provers, the new developed capillary beaker for the gravimetric reference method, validation measurements as well as response time characterization with incompressible and compressible liquids are discussed in this paper.","PeriodicalId":62400,"journal":{"name":"流量控制、测量及可视化(英文)","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81748438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lianfeng Cheng, Chao Xing, Xiaopeng Li, Fan Chen, Huanchang Wei, T. Meng, Huichao Shi
In the actual flow measurement process, flow fluctuations often propagate in the pipeline, which may cause large deviations in the flow measurement results. In order to systematically study the influence of different flow fluctuations on the measurement results of the flowmeter, it is necessary to simulate different controllable flow fluctuations in the pipeline. This paper designs different wave control methods for a vane flow fluctuation generator, and uses LabVIEW programming to control the motor to drive the butterfly valve to swing, forming controllable flow fluctuation of sine wave, frequency conversion sine wave and variable amplitude sine wave in the pipeline. Finally, based on the hot water flow standard facility of National Institute of Metrology(NIM), a real flow experiment is designed to verify the control method of the fluctuation generator. Experimental results show that the proposed control method can control the flow fluctuation generator to generate controllable sine wave, frequency conversion wave and variable amplitude wave , and the flow fluctuation can be propagated along the pipeline upstream and downstream.
{"title":"Control Method And Experimental Verification Of Pipeline Flow Fluctuation Generator","authors":"Lianfeng Cheng, Chao Xing, Xiaopeng Li, Fan Chen, Huanchang Wei, T. Meng, Huichao Shi","doi":"10.21014/tc9-2022.129","DOIUrl":"https://doi.org/10.21014/tc9-2022.129","url":null,"abstract":"In the actual flow measurement process, flow fluctuations often propagate in the pipeline, which may cause large deviations in the flow measurement results. In order to systematically study the influence of different flow fluctuations on the measurement results of the flowmeter, it is necessary to simulate different controllable flow fluctuations in the pipeline. This paper designs different wave control methods for a vane flow fluctuation generator, and uses LabVIEW programming to control the motor to drive the butterfly valve to swing, forming controllable flow fluctuation of sine wave, frequency conversion sine wave and variable amplitude sine wave in the pipeline. Finally, based on the hot water flow standard facility of National Institute of Metrology(NIM), a real flow experiment is designed to verify the control method of the fluctuation generator. Experimental results show that the proposed control method can control the flow fluctuation generator to generate controllable sine wave, frequency conversion wave and variable amplitude wave , and the flow fluctuation can be propagated along the pipeline upstream and downstream.","PeriodicalId":62400,"journal":{"name":"流量控制、测量及可视化(英文)","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91365579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Evaluation of Uncertainty in Measurement of the Super-heated Steam Density based on Monte Carlo Method","authors":"Lei Tan, Lixia Liu, Yang Liu, Yan Zou","doi":"10.21014/tc9-2022.102","DOIUrl":"https://doi.org/10.21014/tc9-2022.102","url":null,"abstract":"","PeriodicalId":62400,"journal":{"name":"流量控制、测量及可视化(英文)","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89622947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H.-B. Böckler, M. de Huu, R. Maury, S. Schmelter, M. Schakel, O. Büker
This paper gives an overview of "The Joint Research Project (JRP) 20IND11 “Metrology infrastructure for high-pressure gas and liquified hydrogen flows” (MetHyInfra) ", the challenges to tackle and the strategy to deal with these challenges. It will outline how this project will lead to a state of art for hydrogen quantity measurement. The paper is connected to four other FLOMEKO submissions, which deal with the latest outputs from the project
{"title":"Metrology infrastructure for high-pressure gas and liquified hydrogen flows","authors":"H.-B. Böckler, M. de Huu, R. Maury, S. Schmelter, M. Schakel, O. Büker","doi":"10.21014/tc9-2022.161","DOIUrl":"https://doi.org/10.21014/tc9-2022.161","url":null,"abstract":"This paper gives an overview of \"The Joint Research Project (JRP) 20IND11 “Metrology infrastructure for high-pressure gas and liquified hydrogen flows” (MetHyInfra) \", the challenges to tackle and the strategy to deal with these challenges. It will outline how this project will lead to a state of art for hydrogen quantity measurement. The paper is connected to four other FLOMEKO submissions, which deal with the latest outputs from the project","PeriodicalId":62400,"journal":{"name":"流量控制、测量及可视化(英文)","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77448166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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