Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation最新文献_第3页

Visualization of R410A Flowing in Copper and Stainless Steel Dimpled Tubes Enhanced by Petal-Shaped Patterns Under Evaporation Conditions 蒸发条件下花瓣状图案增强R410A在铜和不锈钢波纹管内流动的可视化

Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation Pub Date : 2020-07-13 DOI: 10.1115/fedsm2020-20094

Weiyu Tang, Zhi-chuan Sun, Yang Luo, Wei Li

{"title":"Visualization of R410A Flowing in Copper and Stainless Steel Dimpled Tubes Enhanced by Petal-Shaped Patterns Under Evaporation Conditions","authors":"Weiyu Tang, Zhi-chuan Sun, Yang Luo, Wei Li","doi":"10.1115/fedsm2020-20094","DOIUrl":"https://doi.org/10.1115/fedsm2020-20094","url":null,"abstract":"\u0000 Experimental investigations were conducted to study the heat transfer characteristics and flow patterns of R410A during evaporation in three horizontal tubes having the same outside diameter of 12.70 mm and 180 mm in length. The tested tubes contain two tubes with three-dimensional enhanced surface structures (Cu-1EHT and SS-1EHT), and one equivalent smooth tube. This experiment was done at an evaporation temperature of 6 °C and mass flux from 100 to 200 kg/(m2·s) for vapor qualities varying from 0.2 to 0.8. For all the tube tested, flow pattern observations were obtained using a high-speed camera, and the impact of the actual flow regime on heat transfer was discussed. Results indicated that the transition from annular flow to intermittent flow began at a lower vapor quality for two enhanced tubes when compared to the smooth tube. Accordingly, both the Cu-1EHT tube and the SS-1EHT tube exhibited a superior performance than the smooth tube. In addition, the heat transfer coefficient of Cu-1EHT tube is higher than that of the stainless steel one, mainly due to the larger thermal conductivity of wall material.","PeriodicalId":103887,"journal":{"name":"Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129048297","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}

引用次数: 0

An Experimental Investigation on the Erosion of a Helico-Axial Pump With Gas Presence 存在气体时螺旋轴流泵冲蚀的实验研究

Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation Pub Date : 2020-07-13 DOI: 10.1115/fedsm2020-20481

Yi Chen, Abhay V. Patil, Yiming Chen, G. Morrison, M. Rojas

{"title":"An Experimental Investigation on the Erosion of a Helico-Axial Pump With Gas Presence","authors":"Yi Chen, Abhay V. Patil, Yiming Chen, G. Morrison, M. Rojas","doi":"10.1115/fedsm2020-20481","DOIUrl":"https://doi.org/10.1115/fedsm2020-20481","url":null,"abstract":"\u0000 Electrical submersible pump (ESP) technology has been widely applied in the oil and gas industry due to its high productivity. However, erosion always causes the reduction of productivity and sometimes even the failure of an ESP system. This study explores the effect of gas presence on erosion mechanism on an ESP which is composed of 4 stages of Helico-Axial Pump (HAP). A 200-hour erosion test has been performed on this ESP. During the test, the ESP was running at 3600 RPM with a liquid flow rate of 880 GPM, 20% inlet Gas Volume Fraction (GVF), and 0.24% sand concentration by weight. Performance tests were conducted every 50 hours to acquire the performance maps and monitor the performance degradation. Analysis of volume/weight loss and performance degradation is conducted to investigate pump wear. Two types of erosion are found at the impeller: the volume loss found notably at the leading edge is mainly caused by two-body impact erosion, while the tip clearance increment between the impeller housing and impeller blade tip is mainly caused by the three-body abrasive erosion. Unlike most conventional centrifugal pumps, there is no observable wear found at the trailing edge of the impeller. The presence of the gas shows a negative effect on both types of erosion. The consequence of the erosion is the performance degradation, especially at the condition with higher pressure rise. It is suggested to apply this HAP in the oil field with more gas and higher bottom hole pressure.","PeriodicalId":103887,"journal":{"name":"Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127994972","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}

引用次数: 0

Using Liquid Spray Formations to Improve Aerodynamic Performance of Airfoils 利用液体喷雾编队改善翼型气动性能

Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation Pub Date : 2020-07-13 DOI: 10.1115/fedsm2020-20078

G. Loubimov, D. Fontes, Garett Loving, M. Kinzel

引用次数: 0

Comparison of Pathogens Dispersion in an Aircraft Cabin Using Gas Injection Source Versus a Coughing Manikin 使用气体喷射源与咳嗽假人在飞机机舱内病原体扩散的比较

Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation Pub Date : 2020-07-13 DOI: 10.1115/fedsm2020-20095

Seif Mahmoud, J. Bennett, M. Hosni, B. Jones

{"title":"Comparison of Pathogens Dispersion in an Aircraft Cabin Using Gas Injection Source Versus a Coughing Manikin","authors":"Seif Mahmoud, J. Bennett, M. Hosni, B. Jones","doi":"10.1115/fedsm2020-20095","DOIUrl":"https://doi.org/10.1115/fedsm2020-20095","url":null,"abstract":"\u0000 The dispersion characteristics of airborne pathogens were investigated in a Boeing 767 mockup cabin containing 11 rows with 7 seats per row, using two tracer gas source methods: continuous injection at low velocity and a coughing manikin. Both the injection source and the coughing manikin were located on the same seat in the sixth row. The injection source utilized CO2 gas at an injection rate of 5.0 liters per minute mixed with helium at a rate of 3.07 liters per minute to neutralize buoyancy. The manikin coughed approximately once every 75 seconds, with a volume of 4.2 liters of CO2 per cough. To ensure sufficient data were collected at each sampling location, each coughing manikin test was run for 6 coughs and each injection source test for 30 minutes of continuous injection. In both test methods, the tracer gas concentration was measured using CO2 gas analyzers at seated passenger breathing height of 1.2 m and radially up to 3.35 m away from the gas injection location, representing approximately four rows of a standard B767 aircraft. The collected data obtained from each tracer method was then normalized to provide a suitable comparison basis that is independent of tracer gas introduction flowrate. The results showed that both tracer source methods gave similar dispersion trends in diagonal and lateral directions away from the injection location. However, the tracer gas concentration was higher along the longitudinal direction in the coughing manikin tests due to the cough momentum. The results of this work will help researchers analyze different experimental and numerical approaches used to determine contaminant dispersion in various environments and will provide a better understanding of the associated transport phenomena.","PeriodicalId":103887,"journal":{"name":"Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131689234","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}

引用次数: 0

Experimental and Numerical Investigations of Unsteady Flows Downstream Confined Rectangular Obstacles 约束矩形障碍物下游非定常流动的实验与数值研究

Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation Pub Date : 2020-07-13 DOI: 10.1115/fedsm2020-20322

F. Aloui, A. Elawady

引用次数: 0