Revue Générale de Thermique最新文献_第4页

Étude théorique du comportement thermique d'un capteur solaire plan à air à couverture combinée plastique-vitre 塑料-玻璃组合屋顶平面空气太阳能集热器热行为的理论研究

Revue Générale de Thermique Pub Date : 1998-12-01 DOI: 10.1016/S0035-3159(98)80022-6

Donatien Njomo

引用次数: 16

Société française des thermiciens journées d'études 1998–1999 法国热学家学会研讨会1998 - 1999

Revue Générale de Thermique Pub Date : 1998-12-01 DOI: 10.1016/S0035-3159(98)90114-3

引用次数: 0

Intensification of heat transfer at propane pool boiling on single horizontal tubes 单水平管丙烷池沸腾传热强化研究

Revue Générale de Thermique Pub Date : 1998-12-01 DOI: 10.1016/S0035-3159(98)80020-2

Leonard L. Vasiliev , Valery V. Khrolenok, Alexander S. Zhuravlyov

{"title":"Intensification of heat transfer at propane pool boiling on single horizontal tubes","authors":"Leonard L. Vasiliev , Valery V. Khrolenok, Alexander S. Zhuravlyov","doi":"10.1016/S0035-3159(98)80020-2","DOIUrl":"10.1016/S0035-3159(98)80020-2","url":null,"abstract":"<div><p>A set of experiments was carried out with propane pool boiling on the smooth and porous surfaces of horizontal tubes in the saturation pressure ranges <em>p</em> = 3.45 to 13.8 bar (<span><math><mtext>p</mtext><mtext>p</mtext><msub><mi></mi><mn>c</mn></msub><mtext> = 0.081 </mtext><mtext>to</mtext><mtext> 0.323</mtext></math></span>), temperature intervals − 10 to + 40 °C, and heat flux ranges 10<sup>2</sup> to 10<sup>5</sup> W·m<sup>−2</sup>. Three modes of heat transfer were determined: free convection, a transitional mode and developed boiling. Good correlation between the experimental data on smooth tubes and the data published in other references was observed. The dependence of boiling process on saturation pressure and the influence of porous coating parameters on heat transfer intensity were studied. Samples of smooth tubes, tubes with small roughness and tubes with gas-thermal metal sintering on the surface were used for the experiments. Remarkable heat transfer enhancement of up to 2.5–3 times was observed for propane pool boiling on porous horizontal tubes, in comparison with that on smooth and small roughness tubes over the heat flux intervals tested.</p></div>","PeriodicalId":101133,"journal":{"name":"Revue Générale de Thermique","volume":"37 11","pages":"Pages 962-967"},"PeriodicalIF":0.0,"publicationDate":"1998-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0035-3159(98)80020-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72805894","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: 16

Simulation of the two-phase flow in a thermosyphon using an inclined transparent tube with the lower-end closed and the upper-end open 采用倾斜透明管，下端关闭，上端打开，模拟热虹吸管内的两相流动

Revue Générale de Thermique Pub Date : 1998-12-01 DOI: 10.1016/S0035-3159(98)80021-4

Robert Thomas Dobson

{"title":"Simulation of the two-phase flow in a thermosyphon using an inclined transparent tube with the lower-end closed and the upper-end open","authors":"Robert Thomas Dobson","doi":"10.1016/S0035-3159(98)80021-4","DOIUrl":"10.1016/S0035-3159(98)80021-4","url":null,"abstract":"<div><p>The initial liquid charge of a vertically orientated two-phase closed thermosyphon for adequate thermal performance as determined theoretically by assuming that the condensate is in the form of a relatively thin film underestimates the amount determined by using experimental correlations. Knowing the physical details of the two-phase flow within the thermosyphon could explain this discrepancy. Because, however, of the difficulty of directly observing two-phase flow in an actual metal thermosyphon it was decided to investigate the two-phase flow by using air and water in a transparent tube. The tube that was used is closed at the lower end and open at the top end, was partially charged with water, and air was introduced into the closed end at increasing air flow rates until water droplets were just about to be expelled from the open end. The flow patterns occurring as a function of air flow rate were identified. The average liquid fraction in four sections of the tube was determined for different initial charge fractions and inclinations. It was observed that even at low air flow rates significant quantities of liquid were propelled up into the tube and that the flow is oscillatory. It was concluded that care would have to be taken in assuming a relatively thin and uniform liquid film in theoretically modelling a thermosyphon.</p></div>","PeriodicalId":101133,"journal":{"name":"Revue Générale de Thermique","volume":"37 11","pages":"Pages 968-972"},"PeriodicalIF":0.0,"publicationDate":"1998-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0035-3159(98)80021-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77754460","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: 4

Sommaires vol. 37, 1998 摘要，1998年第37卷

Revue Générale de Thermique Pub Date : 1998-12-01 DOI: 10.1016/S0035-3159(98)80015-9

引用次数: 0

Simulation of a full-scale pressurized fluidized bed combustor by using semi-empirical pilot plant correlations 用半经验中试相关性模拟全尺寸加压流化床燃烧室

Revue Générale de Thermique Pub Date : 1998-11-01 DOI: 10.1016/S0035-3159(98)80011-1

Luis M Romeo, Cristóbal Cortés

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引用次数: 4

Caractérisation d'une couche de cisaillement complexe confinée par traceur thermique 热示踪剂约束下复杂剪切层的表征

Revue Générale de Thermique Pub Date : 1998-11-01 DOI: 10.1016/S0035-3159(98)80010-X

Frédéric Plourde, Dominique Couton, Son Doan Kim

引用次数: 0

Referees for the revue générale de thermique 1997/ comité de lecture de la revue générale de thermique 1997 revue generale de termica 1997的裁判/ revue generale de termica 1997的阅读委员会

Revue Générale de Thermique Pub Date : 1998-11-01 DOI: 10.1016/S0035-3159(98)90011-3

引用次数: 0

Corrélations en convection mixte dans des cavités ventilées 通风腔混合对流的相关性

Revue Générale de Thermique Pub Date : 1998-11-01 DOI: 10.1016/S0035-3159(98)80012-3

Abdelghani Raji , Mohammed Hasnaoui

引用次数: 31

Turbulent flow field measurements in a model gas turbine combustion chamber 燃气轮机模型燃烧室湍流流场测量

Revue Générale de Thermique Pub Date : 1998-11-01 DOI: 10.1016/S0035-3159(98)80009-3

Daniele Contini, Marco Ruggiero, Giampaolo Manfrida

引用次数: 1