Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems最新文献

LIQUID CORE STRUCTURE OF EVAPORATING SPRAYS AT HIGH PRESSURES - FLASH X-RAY STUDIES 高压下蒸发喷雾的液芯结构——闪光x射线研究

Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems Pub Date : 1995-12-01 DOI: 10.1615/iclass-94.590

A. Birk, M. McQuaid, M. Gross

{"title":"LIQUID CORE STRUCTURE OF EVAPORATING SPRAYS AT HIGH PRESSURES - FLASH X-RAY STUDIES","authors":"A. Birk, M. McQuaid, M. Gross","doi":"10.1615/iclass-94.590","DOIUrl":"https://doi.org/10.1615/iclass-94.590","url":null,"abstract":"Abstract : This report describes the development and application of flash x-ray radiography for studying the core structure of atomizing jets at high temperatures (to 2,300 K) and pressures (1.4-13.8 MPa). Methyl iodide (CH3I) was injected at approximately 75 m/s through a 1-mm-circular orifice into (hot) nitrogen or the post-combustion products of an H2/Air/Ar mixture. Similar experiments involving injections at 40 m/s through thin, annular orifices were also conducted. Radiographs which resolve core details to less than 0.1 mm were achieved. We observed that the core structure is strongly affected by heat transfer under these conditions. The cores of circular jets were found to develop helical structure whose pitch angle decreased with axial distance from the orifice. As expected, the core penetration distance decreased with increase in ambient gas density. A surprising result was that for the same global ambient gas density, the length of evaporating cores decreased with increase in ambient pressure (and temperature) up to a \"critical\" value, then increased with further rise in pressure. The minimum corresponds to a transition to a pressure and temperature regime above the thermodynamic critical point of the liquid. jg p.3","PeriodicalId":447046,"journal":{"name":"Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125914978","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: 22

CHARACTERIZATION OF LIQUID JET ATOMIZATION ACROSS A HIGH-SPEED AIRSTREAM BY LASER-SHEET TOMOGRAPHY 高速气流中液体喷射雾化的激光层析成像表征

Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems Pub Date : 1994-11-15 DOI: 10.1299/JSMEB.37.937

T. Oda, H. Hiroyasu, M. Arai, K. Nishida

引用次数: 24

MODELING OF ATOMIZATION AND VAPORIZATION PROCESS IN FLASH BOILING SPRAY 闪蒸喷雾雾化和汽化过程的建模

Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems Pub Date : 1994-10-01 DOI: 10.1016/0389-4304(94)90209-7

J. Senda, Y. Hojyo, H. Fujimoto

引用次数: 51

DISCHARGE CHARACTERISTICS OF CRYOGENIC FLUIDS FROM A PRESSURIZED VESSEL 高压容器中低温流体的放电特性

Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems Pub Date : 1994-07-18 DOI: 10.1615/iclass-94.1340

Jiann-Cherng Yang, W. Pitts, B. D. Breuel, G. Gmurczyk, W. Rinkinen, W. G. Cleveland

引用次数: 0

COMPUTER SIMULATION OF THE LIQUID AGENT SPRAY MOTION AND EVAPORATION 液体剂喷雾运动和蒸发的计算机模拟

Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems Pub Date : 1994-07-18 DOI: 10.1615/iclass-94.1330

G. Gmurczyk, L. Y. Cooper, W. Grosshandler, W. Pitts

引用次数: 0

SPRAY CHARACTERIZATION IN A CONFINED FLOW 密闭流动中的喷雾特性

Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems Pub Date : 1994-06-27 DOI: 10.2514/6.1994-2778

P. Trichet, G. Lacergne, F. Bismes

引用次数: 1

THE DISPERSION OF FIRE SUPPRESSION AGENTS DISCHARGED FROM HIGH PRESSURE VESSELS : ESTABLISHING INITIAL/BOUNDARY CONDITIONS FOR THE FLOW OUTSIDE THE VESSEL 高压容器排出的灭火剂的分散:建立容器外流动的初始/边界条件

Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems Pub Date : 1993-09-01 DOI: 10.6028/nist.ir.5219

L. Y. Cooper

{"title":"THE DISPERSION OF FIRE SUPPRESSION AGENTS DISCHARGED FROM HIGH PRESSURE VESSELS : ESTABLISHING INITIAL/BOUNDARY CONDITIONS FOR THE FLOW OUTSIDE THE VESSEL","authors":"L. Y. Cooper","doi":"10.6028/nist.ir.5219","DOIUrl":"https://doi.org/10.6028/nist.ir.5219","url":null,"abstract":"Abstract : This work reports on part of an effort to study the dispersion and extinguishment effectiveness of Halon and Halon alternative fire extinguishment agents discharged from N2-pressurized vessels. In the systems under consideration, as the agent exits from the vessel, thermodynamic and fluid dynamic instabilities lead to flashing and breakup of the agent into a two phase droplet/gaseous jet mixture. This occurs in a transition region relatively close to the vessel exit orifice/nozzle. Downstream of this region the two phase agent jet then mixes with the ambient air environment and is dispersed in the protected space. A mathematical model has been developed previously to simulate the time dependent discharge of the agent from the pressure vessel. Using the output of this model and thermodynamic and fluid dynamic considerations of the phenomena in the transition section, the present work develops a method for determining a set of initial/boundary conditions at an initial section of the jet, downstream of the transition region. These initial/boundary conditions are in a form that can be used to formulate and solve the problem of the development and dispersal of the ensuing mixed air/two- phase-agent jet. Example applications of the developed methodology are presented. These are for agent discharge from a half liter cylindrical discharge vessel with a circular discharge nozzle/orifice of diameter 0.019m. Simulations involve discharge of the vessel when it is half filled with either Freon 22 or Halon 1301 and then pressurized with N2 to 41.37x10(exp 5) Pa (600 psi).","PeriodicalId":447046,"journal":{"name":"Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129966014","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

ADAPTIVE PHASE/DOPPLER SYSTEMS AND THEIR APPLICATIONS TO SPRAYS AND SPRAY DRYING PROCESSES 自适应相位/多普勒系统及其在喷雾和喷雾干燥过程中的应用

Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems Pub Date : 1900-01-01 DOI: 10.1615/iclass-94.610

A. Naqwi, R. Menon

引用次数: 0

STRUCTURE EVOLUTION OF SPRAYS IN COAXIAL JET BURNERS 同轴射流燃烧器喷雾结构演化

Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems Pub Date : 1900-01-01 DOI: 10.1615/iclass-94.1000

M. Graziadio, Dighero, P. Gattini, L. Tognotti

引用次数: 0

IGNITION OF DROPLETS: DISCUSSION ON THE VALIDITY OF THE IGNITION CRITERIA DERIVED ASSUMING GAS-PHASE QUASI-STEADINESS WITHOUT CONSIDERING FUEL VAPOR ACCUMULATION EFFECTS 液滴点火:讨论假设气相准稳态而不考虑燃料蒸气积聚效应的点火判据的有效性

Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems Pub Date : 1900-01-01 DOI: 10.1615/iclass-94.880

S. Wong, T. Hsu, J. Chang

引用次数: 0