Heat Transfer: Volume 4 — Combustion and Energy Systems最新文献_第4页

Transient Measurements of Gas Species Concentrations and Soot Properties in Pool Fires 池火中气体种类浓度和煤烟特性的瞬态测量

Heat Transfer: Volume 4 — Combustion and Energy Systems Pub Date : 2001-11-11 DOI: 10.1115/imece2001/htd-24253

Jeffrey J. Murphy, C. Shaddix

引用次数: 0

Ultrafast Deformation in Femtosecond Laser Heating 飞秒激光加热中的超快变形

Heat Transfer: Volume 4 — Combustion and Energy Systems Pub Date : 2001-11-11 DOI: 10.1115/1.1447934

D. Tzou, J. Beraun, J. K. Chen

引用次数: 37

The Feasibility of Using Photothermal Deflection Spectroscopy to Measure Thermal Contact Resistance in a Film on Substrate System 光热偏转光谱法测量衬底薄膜系统热接触电阻的可行性

Heat Transfer: Volume 4 — Combustion and Energy Systems Pub Date : 2001-11-11 DOI: 10.1115/imece2001/htd-24276

J. Foley, C. Avedisian

引用次数: 2

Two-Phase Refrigerant Mixture (R-407C) Flow in Smooth Meso-Scale Heat Exchangers 两相制冷剂混合物(R-407C)在光滑中尺度热交换器中的流动

Heat Transfer: Volume 4 — Combustion and Energy Systems Pub Date : 2001-11-11 DOI: 10.1115/imece2001/htd-24282

Yasir M. Shariff, T. S. Ravigururajan

引用次数: 0

Physical Scaling of Fire Suppression by Water Mist 水雾灭火的物理缩放

Heat Transfer: Volume 4 — Combustion and Energy Systems Pub Date : 2001-11-11 DOI: 10.1115/imece2001/htd-24238

G. Su, J. Quintiere, N. Schultz

{"title":"Physical Scaling of Fire Suppression by Water Mist","authors":"G. Su, J. Quintiere, N. Schultz","doi":"10.1115/imece2001/htd-24238","DOIUrl":"https://doi.org/10.1115/imece2001/htd-24238","url":null,"abstract":"\u0000 The objective of the project is to develop water mist extinguishments design by scaling. The report describes the requirement and criteria of scaling fire, scale model, and the results of suppression for a developing water mist system design. The Maritime Safety Committee Draft Circular, MSC 914 is used as a basis test to evaluate a water mist design. A series of three full-scale tests related to MSC 914 were performed: fire only, fire with steel trailers, and fire with steel trailers and combustible commodities. A simulation was accordingly studied. Then, a scaled water mist design was tested in the scale model to find the characteristics needed for suppression in terms of pressure, water flow rate, droplet size, and the spray momentum. Based on these characteristics, a candidate nozzle will be selected for the full-scale MSC 914 test. The results so far show that the water mist system can effectively suppress the fire in scaled MSC 914 model. The full-scale MSC 914 is scheduled for September 2001. Therefore, the final answer is still pending until then. Scaling results are confirmed for temperatures, heat flux and flow for the MSC 914 fire without water add in.","PeriodicalId":426926,"journal":{"name":"Heat Transfer: Volume 4 — Combustion and Energy Systems","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133866480","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: 3

Transient Radiation Element Method for Three-Dimensional Scattering, Absorbing, and Emitting Media 三维散射、吸收和发射介质的瞬态辐射单元法

Heat Transfer: Volume 4 — Combustion and Energy Systems Pub Date : 2001-11-11 DOI: 10.1115/imece2001/htd-24265

Zhixiong Guo, Sunil Kumar, S. Maruyama

引用次数: 6

A Study of Effects of Combustion on the Noise Generated by a Circular Jet Flow 燃烧对圆形射流噪声影响的研究

Heat Transfer: Volume 4 — Combustion and Energy Systems Pub Date : 2001-11-11 DOI: 10.1115/imece2001/htd-24256

Kapil Singh, S. Frankel, J. Gore

引用次数: 0

A Two-Phase and Multi-Component Model for the Cathode of PEM Fuel Cells PEM燃料电池正极的两相多组分模型

Heat Transfer: Volume 4 — Combustion and Energy Systems Pub Date : 2001-11-11 DOI: 10.1115/imece2001/htd-24273

Lixin You, Hongtan Liu

{"title":"A Two-Phase and Multi-Component Model for the Cathode of PEM Fuel Cells","authors":"Lixin You, Hongtan Liu","doi":"10.1115/imece2001/htd-24273","DOIUrl":"https://doi.org/10.1115/imece2001/htd-24273","url":null,"abstract":"\u0000 A two-dimensional, two-phase and multi-component flow and transport model has been developed to simulate the flow and transport phenomena in the cathodes of PEM fuel cells. First, the governing equations based on a “two-phase mixture model” are derived by using a unified approach that describes the flow and transport in the gas channel and gas diffuser simultaneously. Then, the detailed boundary conditions are discussed especially at the gas diffuser/catalyst layer interface, which couples the flow, transport, potential and current density in the anode, the catalyst layer and membrane. Next, the model is validated by comparing the modeling results with experimental data. Further, typical distributions of oxygen and water-mass fraction in the “two-phase mixture,” as well as water vapor mass fraction, liquid saturation and liquid velocity vector are presented. Finally, the model is used to study the influences of two of the most critical issues of PEM fuel cell operation: i.e., the water and the thermal management on the two-phase flow. It was found that the two-phase flow characteristics in the cathode depend on some of the following factors: current density, operating temperature, and cathode and anode humidification temperatures. The dependence of the formation and the distribution of the two-phase flow in the gas diffuser and gas channel on these factors is explored. By studying the effects of these parameters on the two-phase flow and the fuel cell performance, the model can be used to study a water and thermal management scheme.","PeriodicalId":426926,"journal":{"name":"Heat Transfer: Volume 4 — Combustion and Energy Systems","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125369671","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: 9

Large Eddy Simulation and Experimental Measurements of a Methane-Air Fire Plume 甲烷-空气火灾羽流的大涡模拟与实验测量

Heat Transfer: Volume 4 — Combustion and Energy Systems Pub Date : 2001-11-11 DOI: 10.1115/imece2001/htd-24249

P. DesJardin, S. Tieszen, T. O'Hern

引用次数: 0

Using Amorphous Material Properties in Scattering-Mediated Acoustic Mismatch Model for Predicting Thermal Boundary Resistance 利用非晶材料特性在散射介导的声失配模型中预测热边界电阻

Heat Transfer: Volume 4 — Combustion and Energy Systems Pub Date : 2001-11-11 DOI: 10.1115/imece2001/htd-24281

A. Devpura, R. Prasher, P. Phelan

{"title":"Using Amorphous Material Properties in Scattering-Mediated Acoustic Mismatch Model for Predicting Thermal Boundary Resistance","authors":"A. Devpura, R. Prasher, P. Phelan","doi":"10.1115/imece2001/htd-24281","DOIUrl":"https://doi.org/10.1115/imece2001/htd-24281","url":null,"abstract":"\u0000 Solid-solid thermal boundary resistance (Rb) plays an important role in determining the heat flow between materials. The acoustic mismatch model (AMM) and the diffuse mismatch model (DMM), work pretty well in describing and predicting the thermal energy transport at solid-solid interface at very low temperatures (in the range of few Kelvin). At moderate cryogenic temperatures they do not perform that well, and the reason may be attributed to the dominance of scattering in determining Rb. Scattering mediated acoustic mismatch model (SMAMM) was developed on this principle. Though SMAMM works well, it has some fundamental problems. SMAMM’s assumption of U-processes, for amorphous layer formed between materials, is physically unexplainable. It also assumes unrealistically small scattering time. We propose a modified version of SMAMM called Amorphous SMAMM, which takes into account amorphous material properties for the interstitial layer formed, to find the scattering time to be used in SMAMM. This model performs better than all the models in the range of 25 to 60 K in predicting Rb. Above this temperature, original SMAMM performs better, but Amorphous SMAMM always performs better than the AMM. Amorphous SMAMM does not run into any physical problems with the assumptions made, hence the results have a better physical significance than SMAMM’s.","PeriodicalId":426926,"journal":{"name":"Heat Transfer: Volume 4 — Combustion and Energy Systems","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133857693","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