Symposium on Combustion and Flame, and Explosion Phenomena最新文献

The oxidation of sulphur dioxide in combustion processes 燃烧过程中二氧化硫的氧化

Symposium on Combustion and Flame, and Explosion Phenomena Pub Date : 1948-01-01 DOI: 10.1016/S1062-2896(49)80058-4

G. Whittingham

引用次数: 3

Theory of propagation of flames. Part II: Approximate solutions 火焰传播理论。第二部分:近似解

Symposium on Combustion and Flame, and Explosion Phenomena Pub Date : 1948-01-01 DOI: 10.1016/S1062-2896(49)80016-X

M.J. Henkel, W.P. Spaulding, J.O. Hirschfelder

引用次数: 3

Initiation of detonation of explosives 炸药的起爆

Symposium on Combustion and Flame, and Explosion Phenomena Pub Date : 1948-01-01 DOI: 10.1016/S1062-2896(49)80075-4

G.B. Kistiakowsky

引用次数: 7

A note on the calculation of multicomponent propellant gas compositions 多组分推进剂气体成分计算注记

Symposium on Combustion and Flame, and Explosion Phenomena Pub Date : 1948-01-01 DOI: 10.1016/S1062-2896(49)80085-7

G.F. Sachsel, M.E. Mantis, J.C. Bell

引用次数: 0

Transition from deflagration to detonation: The physico-chemical aspects of stable detonation 从爆燃到爆轰的过渡:稳定爆轰的物理化学方面

Symposium on Combustion and Flame, and Explosion Phenomena Pub Date : 1948-01-01 DOI: 10.1016/S1062-2896(49)80076-6

A.R. Ubbelohde

引用次数: 5

Aerodynamical effects of heat released by combustion of steadily flowing gases 稳定流动气体燃烧释放热量的空气动力学效应

Symposium on Combustion and Flame, and Explosion Phenomena Pub Date : 1948-01-01 DOI: 10.1016/S1062-2896(49)80029-8

Bruce L. Hicks

引用次数: 1

The ignition of gaseous explosive media by hot wires 用热线点燃气体爆炸性介质

Symposium on Combustion and Flame, and Explosion Phenomena Pub Date : 1948-01-01 DOI: 10.1016/S1062-2896(49)80039-0

H.P. Stout, E. Jones

引用次数: 7

Mixing and combustion in turbulent gas jets 湍流气体射流中的混合和燃烧

Symposium on Combustion and Flame, and Explosion Phenomena Pub Date : 1948-01-01 DOI: 10.1016/S1062-2896(49)80035-3

W.R. Hawthorne , D.S. Weddell , H.C. Hottel

{"title":"Mixing and combustion in turbulent gas jets","authors":"W.R. Hawthorne , D.S. Weddell , H.C. Hottel","doi":"10.1016/S1062-2896(49)80035-3","DOIUrl":"10.1016/S1062-2896(49)80035-3","url":null,"abstract":"<div>Visible flame lengths and concentration patternshave been obtained in turbulent jets of flame formed by combustible gas issuing from circular nozzles into stagnant air. The nozzle velocities were above those which, in a previous paper, were found necessary to insure that the mixing should be turbulent. As a basis for analysis of the data a simplified treatment is presented for mixing of nozzle and ambient fluids in a vertical jet. The simplifying assumption of constant velocity and composition in a cross-section normal to the axis of flow is combined with a force-momentum balance, continuity, and the perfect gas laws to obtain a relation between mean concentration and jet spread. The relation allows for initial difference in density of nozzle and ambient streams, density variation due to combustion, and buoyancy. The qualitative agreement between the analysis and the experimental data on visible flame lengths and axial concentration patterns indicates plainly that the process of mixing resulting from the momentum and buoyancy of the jet is the controlling factor in determining progress of the combustion. For tree flames in which the effects of buoyancy are small (high nozzle velocity, small diameter) the analysis leads to the following simple relation for the length of free turbulent flame jets:<math><mrow><mrow><mi>L</mi><mo>/</mo><mi>D</mi></mrow><mo>=</mo><mfrac><mrow><mn>5.3</mn></mrow><mrow><msub><mi>C</mi><mi>τ</mi></msub></mrow></mfrac><msqrt><mrow><mfrac><mrow><msub><mi>T</mi><mi>F</mi></msub></mrow><mrow><msub><mi>α</mi><mi>T</mi></msub><msub><mi>T</mi><mi>N</mi></msub></mrow></mfrac><mrow><mo>[</mo><mrow><msub><mi>C</mi><mi>τ</mi></msub><mo>+</mo><mrow><mo>(</mo><mrow><mn>1</mn><mo>−</mo><msub><mi>C</mi><mi>τ</mi></msub></mrow><mo>)</mo></mrow><mfrac><mrow><msub><mi>M</mi><mi>S</mi></msub></mrow><mrow><msub><mi>M</mi><mi>N</mi></msub></mrow></mfrac></mrow><mo>]</mo></mrow></mrow></msqrt></mrow></math>where L=visible flame length D=nozzle diameter TF=adiabatic flame temperature, absolute TN=absolute temperature of nozzle fluid MS, MN=molecular weights of surrounding and nozzle fluids, respectively CT=mol fraction of nozzle fluid in the unreacted stoichiometric mixture αT=mols of reactants/mols products, for the stoichiometric mixture. It is to be noted that fuel gas flow rate is no factor, as long as it is great enough to prodace a turbulent jet. Although data for testing this relation covered the small range of port diameter of 0.12 to 0.30 inches, a wide variety of fuels was studied, including propane, acetylene, hydrogen, carbon monoxide, city gas, mixtures of carbon dioxide with city gas, and mixtures of hydrogen with propane. Turbulent flame lengths varying from 40 to 290 nozzle diameters are predicted with average and</div>","PeriodicalId":101204,"journal":{"name":"Symposium on Combustion and Flame, and Explosion Phenomena","volume":"3 1","pages":"Pages 266-288"},"PeriodicalIF":0.0,"publicationDate":"1948-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1062-2896(49)80035-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"98158327","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: 249

The determination of radical concentrations and reactivities in chemical reactions 化学反应中自由基浓度和反应活性的测定

Symposium on Combustion and Flame, and Explosion Phenomena Pub Date : 1948-01-01 DOI: 10.1016/S1062-2896(49)80055-9

H.W. Melville

引用次数: 0

Spectroscopic studies of low-pressure flames 低压火焰的光谱研究

Symposium on Combustion and Flame, and Explosion Phenomena Pub Date : 1948-01-01 DOI: 10.1016/S1062-2896(49)80068-7

A.G. Gaydon, H.G. Wolfhard

引用次数: 21