Relevant bibliographies by topics / Heat flux. Heat Flame spread

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Heat flux. Heat Flame spread'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Heat flux. Heat Flame spread"

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AGRAWAL, SANJAY, and INDREK S. WICHMAN. "Heat Flux Distributions in Wind-Aided Flame Spread." Combustion Science and Technology 81, no. 1-3 (1992): 25–43. http://dx.doi.org/10.1080/00102209208951792.

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Long, Yang, and Indrek S. Wichman. "Theoretical and numerical analysis of a spreading opposed-flow diffusion flame." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 465, no. 2110 (2009): 3209–38. http://dx.doi.org/10.1098/rspa.2009.0152.

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This article describes the macroscopic and microscopic features of flames spreading over solid-fuel surfaces by examining and comparing three models. The first model examines ignition and flame spread over a solid-fuel surface using a two-dimensional numerical simulation code. This model employs variable density, variable thermophysical properties and one-step global finite-rate chemistry. The second model, a macroscopic ‘field’ model, is solved in terms of the mixture fraction ( Z ) and total enthalpy ( H ) functions. Comparisons are made with numerical predictions for primitive quantities: t
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Aswin, C., S. Srichand Vishnu, D. Aravind Kumar, et al. "Studies on Ignition Delay and Flame Spread in High-Performance Solid Rocket Motors." Applied Mechanics and Materials 232 (November 2012): 316–21. http://dx.doi.org/10.4028/www.scientific.net/amm.232.316.

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Accurate prediction of ignition delay and flame spread rate in solid propellant rocket motors is of great topical interest. In this paper using a standard k-ω turbulence model numerical studies have been carried out to examine the influence of solid rockets port geometry on ignition delay and the flame spread pattern. We observed that with the same inflow conditions and propellant properties heat flux histories and ignition time sequence are different for different port geometries. We conjectured from the numerical results that in solid rocket motors with highly loaded propellants, mass flux o
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Wang, Lu, Yi Xing Bi, Wei Wu, and Da Jun Xu. "Large-Scale Experimental Investigation of the Fire Characteristics Parameters of Methanol in Coal Chemical Industry." Applied Mechanics and Materials 713-715 (January 2015): 2745–49. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.2745.

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A steel channel with the size of 30×2×1.2 m was made to simulate the full surface fire of 50000 m3methanol tank in coal-to-olefins industry. Some fire characteristic parameters of methanol were investigated, including flame spread rate, flame height, temperature distribution and radiation heat flux distribution. It is found that the flame spread rate of methanol is 1.98 m/s and the flame height could reach to 3.2 m. The temperature of methanol flame is first up and then down with the increase of height, while the highest temperature is 768oC. It is also found that the radiation heat flux of me
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Li, Kaiyuan, and Simo Hostikka. "Embedded flame heat flux method for simulation of quasi-steady state vertical flame spread." Fire Safety Journal 104 (March 2019): 117–29. http://dx.doi.org/10.1016/j.firesaf.2019.01.011.

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Ma, Xin, Ran Tu, Yan Li Zhao, Nan Wang, and Qi Yuan Xie. "Experimental Study on Downward Flame Spread of Rigid Polyurethane Foam with External Radiation." Applied Mechanics and Materials 664 (October 2014): 194–98. http://dx.doi.org/10.4028/www.scientific.net/amm.664.194.

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Research on building insulation materials and their safety is an important topic in the field of building energy conservation. The objective of this paper is to analyze the coupling effects of the width and external radiation on the downward RPU foam flame spread characteristics. The most important flame characteristics including flame height, mass loss rate, flame spread rate were studied experimentally. The results suggest that with increasing external radiation levels, flame spread rate was larger. Under the condition of the external radiation heat flux exceeds a critical level, the RPU foa
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Morandini, Frédéric, and Xavier Silvani. "Experimental investigation of the physical mechanisms governing the spread of wildfires." International Journal of Wildland Fire 19, no. 5 (2010): 570. http://dx.doi.org/10.1071/wf08113.

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One of the objectives of the present study is to gain a deeper understanding of the heat transfer mechanisms that control the spread of wildfires. Five experimental fires were conducted in the field across plots of living vegetation. This study focussed on characterising heat transfer ahead of the flame front. The temperature and heat flux were measured at the top of the vegetation as the fire spread. The results showed the existence of two different fire spread regimes that were either dominated by radiation or governed by mixed radiant–convective heat transfer. For plume‐dominated fires, the
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Rantuch, Peter, Tomáš Štefko, and Jozef Martinka. "Critical Heat Flux Determination of Electric Cable Insulation." Research Papers Faculty of Materials Science and Technology Slovak University of Technology 26, no. 42 (2018): 11–20. http://dx.doi.org/10.2478/rput-2018-0001.

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Abstract Electric cables can contribute to the spread of fire through the insulating layer. This paper focuses on their properties characterizing the initiation of fire. Samples of ethylene-based cable insulation were tested using a cone calorimeter by exposing them to external heat flows of six different values (25 kW m−2 – 50 kW m−2). Time to initiate flame burning was observed. The critical heat flux (depending on the method of calculation was in the range 2.94 kW m−2 – 4.59 kW m−2) and the thermal response parameter (342 kW s−0.5 m−2) was calculated from the time of initiation and external
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Leventon, Isaac T., and Stanislav I. Stoliarov. "Evolution of flame to surface heat flux during upward flame spread on poly(methyl methacrylate)." Proceedings of the Combustion Institute 34, no. 2 (2013): 2523–30. http://dx.doi.org/10.1016/j.proci.2012.06.051.

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An, Wei Guang, Hua Hua Xiao, Jin Hua Sun, et al. "Experimental Study on Downward Flame Spread across XPS Surface." Advanced Materials Research 753-755 (August 2013): 445–51. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.445.

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To study downward flame spread across XPS surface, a series of laboratory-scale experiments were conducted. Typical flame spread characteristics were obtained. The flame spread process comprises four stages. There are twice accelerations during flame spread. The influence of maximum flame height on flame spread rate is not significant. The predicted flame spread rate utilizing mass loss rate is lower than the measured value. Three stages: increasing stage, stable stage and decreasing stage are observed in both change of maximum flame height and flame area. The changing trend of mass loss rate
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Dissertations / Theses on the topic "Heat flux. Heat Flame spread"

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Beaulieu, Patricia. "Flammability characteristics at heat fluxes up to 200 kW/m2 and the effect of oxygen on flame heat flux." Link to electronic dissertation, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-121905-082146/.

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Dissertation (Ph.D.) -- Worcester Polytechnic Institute.<br>Keywords: ignition; fire; flammability; burning; scalability; heat flux oxygen; mass loss rate. Includes bibliographical references (p.44-49).
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Beaulieu, Patricia. "Flammability Characteristics at Heat Fluxes up to 200 kW/m2 and The Effect of Oxygen on Flame Heat Flux." Digital WPI, 2005. https://digitalcommons.wpi.edu/etd-dissertations/427.

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"This dissertation documents two interrelated studies that were conducted to more fundamentally understand the scalability of flame heat flux. The first study used an applied heat flux in the bench scale horizontal orientation which simulates a large scale flame heat flux. The second study used enhanced ambient oxygen to actually increase the bench scale flame heat flux itself. Understanding the scalability of flame heat flux more fully will allow better ignition and combustion models to be developed as well as improved test methods. The key aspect of the first study was the use of real scale
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Fleury, Rob. "Evaluation of Thermal Radiation Models for Fire Spread Between Objects." Thesis, University of Canterbury. Civil and Natural Resources Engineering, 2010. http://hdl.handle.net/10092/4959.

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Fire spread between objects within a compartment is primarily due to the impingement of thermal radiation from the fire source. In order to estimate if or when a remote object from the fire will ignite, one must be able to quantify the radiative heat flux being received by the target. There are a variety of methods presented in the literature that attempt to calculate the thermal radiation to a target; each one based on assumptions about the fire. The performance of six of these methods, of varying complexity, is investigated in this research. This includes the common point source model,
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Wong, William Chiu-Kit. "CFD Flame Spread Model Validation: Multi-Component Data Set Framework." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/918.

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"Review of the literature shows that the reported correlation between predictions and experimental data of flame spread vary greatly. The discrepancies displayed by the models are generally attributed to inaccurate input parameters, user effects, and inadequacy of the model. In most experiments, the metric to which the model is deemed accurate is based on the prediction of the heat release rate, but flame spread is a highly complex phenomenon that should not be simplified as such. Moreover, fire growth models are usually made up of distinctive groups of calculation on separate physical phen
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Wright, Mark T. "Flame spread on composite materials for use in high speed craft." Link to electronic version, 1999. http://www.wpi.edu/Pubs/ETD/Available/etd-110599-160802/.

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Peraza, Ávila Jesús Enrique. "Experimental study of the diesel spray behavior during the jet-wall interaction at high pressure and high temperature conditions." Doctoral thesis, Universitat Politècnica de València, 2020. http://hdl.handle.net/10251/149389.

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[EN] The potential of diesel engines in terms of robustness, efficiency and energy density has made them widely used as power generators and propulsion systems. Specifically, fuel atomization, vaporization and air-fuel mixing, have a fundamental effect on the combustion process, and consequently, a direct impact on pollutant formation, fuel consumption and noise emission. Since the combustion chamber has a limited space respect to the spray penetration, wall impingement is considered to be a common event in direct injection diesel engines, having a relevant influence in the spray evolution and
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Adam, Brittany A. "INCORPORATING DYNAMIC FLAME BEHAVIOR INTO THE SCALING LAWS OF WILDLAND FIRE SPREAD." UKnowledge, 2015. http://uknowledge.uky.edu/me_etds/54.

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A challenge for fire researchers is obtaining data from those fires that are most dangerous and costly. While it is feasible to instrument test beds, test plots, and small prescribed burns for research, it is uncommon to successfully instrument an active wildland fire. With a focus on very specific facets of wildland fire, researchers have created many unique models utilizing matchsticks, cardboard, liquid fuel, excelsior, plywood, live fuels, dead fuels, and wood cribs of different packing densities. Such scale models, however, only serve as valid substitutes for the full-scale system when al
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Musluoglu, Eren. "A Theoretical Analysis Of Fire Development And Flame Spread In Underground Trains." Phd thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610860/index.pdf.

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The fire development and flame spread in the railway carriages are investigated by performing a set of simulations using a widely accepted simulation software called &amp<br>#8216<br>Fire Dynamics Simulator&amp<br>#8217<br>. Two different rolling stock models<br>representing a train made up of physically separated carriages, and a 4-car train with open wide gangways<br>have been built to examine the effects of train geometry on fire development and smoke spread within the trains. The simulations incorporate two different ignition sources<br>a small size arson fire, and a severe baggage fire i
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山本, 和弘, Kazuhiro YAMAMOTO, 幸一 森, Koichi MORI, 義昭 小沼 та Yoshiaki ONUMA. "可燃性固体の燃え拡がりに及ぼす周囲雰囲気の影響 (第2報, 希釈の影響と気相の温度測定)". 日本機械学会, 2003. http://hdl.handle.net/2237/9358.

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山本, 和弘, та Kazuhiro YAMAMOTO. "可燃性固体の燃え拡がりに対するモデルの検討". 日本機械学会, 2003. http://hdl.handle.net/2237/9361.

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Books on the topic "Heat flux. Heat Flame spread"

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S, Tʻien James, and United States. National Aeronautics and Space Administration., eds. Numerical computation of flame spread over a thin solid in forced concurrent flow with gas-phase radiation. National Aeronautics and Space Administration, 1994.

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Book chapters on the topic "Heat flux. Heat Flame spread"

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Karpov, Alexander, Artem Shaklein, Mikhail Korepanov, and Artem Galat. "Numerical Study of the Radiative and Turbulent Heat Flux Behavior of Upward Flame Spread Over PMMA." In Fire Science and Technology 2015. Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-0376-9_86.

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Shi, Zhongyuan, and Tao Dong. "Experimental Investigation of Developing Spray Boiling on a Flat Flake Surface with Constant Heat Flux." In Progress in Systems Engineering. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-08422-0_16.

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Dietenberger, Mark A. "Protocol for Ignitability, Lateral Flame Spread, and Heat Release Rate Using Lift Apparatus." In ACS Symposium Series. American Chemical Society, 1995. http://dx.doi.org/10.1021/bk-1995-0599.ch029.

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Perakis, Nikolaos, and Oskar J. Haidn. "Experimental and Numerical Investigation of CH$$_4$$/O$$_2$$ Rocket Combustors." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53847-7_23.

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Abstract The experimental investigation of sub-scale rocket engines gives significant information about the combustion dynamics and wall heat transfer phenomena occurring in full-scale hardware. At the same time, the performed experiments serve as validation test cases for numerical CFD models and for that reason it is vital to obtain accurate experimental data. In the present work, an inverse method is developed able to accurately predict the axial and circumferential heat flux distribution in CH$$_4$$/O$$_2$$ rocket combustors. The obtained profiles are used to deduce information about the injector-injector and injector-flame interactions. Using a 3D CFD simulation of the combustion and heat transfer within a multi-element thrust chamber, the physical phenomena behind the measured heat flux profiles can be inferred. A very good qualitative and quantitative agreement between the experimental measurements and the numerical simulations is achieved.
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Kaimal, J. C., and J. J. Finnigan. "Spectra and Cospectra Over Flat Uniform Terrain." In Atmospheric Boundary Layer Flows. Oxford University Press, 1994. http://dx.doi.org/10.1093/oso/9780195062397.003.0005.

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Turbulent flows like those in the atmospheric boundary layer can be thought of as a superposition of eddies—coherent patterns of velocity, vorticity, and pressure— spread over a wide range of sizes. These eddies interact continuously with the mean flow, from which they derive their energy, and also with each other. The large “energy-containing” eddies, which contain most of the kinetic energy and are responsible for most of the transport in the turbulence, arise through instabilities in the background flow. The random forcing that provokes these instabilities is provided by the existing turbulence. This is the process represented in the production terms of the turbulent kinetic energy equation (1.59) in Chapter 1. The energy-containing eddies themselves are also subject to instabilities, which in their case are provoked by other eddies. This imposes upon them a finite lifetime before they too break up into yet smaller eddies. This process is repeated at all scales until the eddies become sufficiently small that viscosity can affect them directly and convert their kinetic energy to internal energy (heat). The action of viscosity is captured in the dissipation term of the turbulent kinetic energy equation. The second-moment budget equations presented in Chapter 1, of which (1.59) is one example, describe the summed behavior of all the eddies in the turbulent flow. To understand the conversion of mean kinetic energy into turbulent kinetic energy in the large eddies, the handing down of this energy to eddies of smaller and smaller scale in an “eddy cascade” process, and its ultimate conversion to heat by viscosity, we must isolate the different scales of turbulent motion and separately observe their behavior. Taking Fourier spectra and cospectra of the turbulence offers a convenient way of doing this. The spectral representation associates with each scale of motion the amount of kinetic energy, variance, or eddy flux it contributes to the whole and provides a new and invaluable perspective on boundary layer structure. The spectrum of boundary layer fluctuations covers a range of more than five decades: millimeters to kilometers in spatial scales and fractions of a second to hours in temporal scales.
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Conference papers on the topic "Heat flux. Heat Flame spread"

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Mahmud, Rizal, Toru Kurisu, Nasrul Ilminnafik, Keiya Nishida, Yoichi Ogata, and Rizal Mahmud. "Wall Heat Flux on Impinging Diesel Spray Flame: Effect of Hole Size and Rail Pressure at Similar Injection Rate Condition." In Small Powertrain and Energy Systems Technology Conference. SAE International, 2020. http://dx.doi.org/10.4271/2020-32-2313.

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Taskinen, Pertti. "Effect of Soot Radiation on Flame Temperature, NOx-Emission and Wall Heat Transfer in a Medium Speed Diesel Engine." In ASME 2002 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/icef2002-535.

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The main aim in this study was to investigate the effect of soot radiation on the maximum flame temperature, the total heat flux to wall and the NOx-emission levels in a medium speed diesel engine. Also the effect of turbulence models (STD or RNG k-epsilon) the combustion and emission results were investigated. The RNG k-epsilon model was modified as part of the velocity dilatation term by using an analysis of rapid spherical distortion. In the modified KIVA2-CFD code the Magnussen EDC (Eddy Dissipation Concept) model was used for the fuel vapor combustion, the Tesner &amp; Magnussen model for
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Nieckele, Angela O., Moˆnica F. Naccache, Marcos S. P. Gomes, Joa˜o N. E. Carneiro, and Bruno Goes e. Silva. "Performance of the Combustion Process Inside an Aluminum Melting Furnace With Natural Gas and Liquid Fuel." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79042.

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The choice of the type of fuel used as energy source for the aluminum melting can be of extreme importance for a better performance as well as for a greater preservation of the equipments. The option of a liquid or gaseous fuel can significantly alter the combustion aspects inside the furnace, such as the shape of the flame and the distribution of temperature and heat flux. In the present work, numerical simulations were carried out using the commercial package FLUENT, analyzing different cases with two types of fuel: a spray of liquid oil and a natural gas jet, both reacting with pure oxygen.
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Sakai, S., and Y. Watanabe. "Numerical Study of Interaction Between Natural Convection Flow and Horizontal Wind." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37212.

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When a large-scale fire, such as a town area fire by an earthquake disaster and forest fire, happens, there can be a fire whirlwind, which is a strong flow including strong flame and sparks. It is sometimes called a firestorm. Fire whirlwind is exposed to high heat, and possesses high heat itself. Therefore, the fire whirlwind is very dangerous. The whirlwind moves and promotes spread of a fire and may enlarge the damage rapidly. Various studies are performed about fire whirlwind, but the property and outbreak mechanism of the whirlwind are not elucidated enough till now. Therefore, in this st
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Sanchez, Tomas M., A. Burl Donaldson, and Walt Gill. "Investigation of Molten/Oxidized Aluminum Powder Deposition on Stainless Steel 304." In ASME 2012 Fluids Engineering Division Summer Meeting collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/fedsm2012-72444.

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Accidents involving solid propellants containing aluminum can be difficult to model due to the additional heat transfer from molten aluminum or aluminum combustion and impingement/deposition of oxide on target objects. A series of tests has been carried out using a commercially available oxy-acetylene torch and powder feeder to investigate the effects of molten/oxidized aluminum on stainless steel 304 substrates. SEM and EDS have been used to determine diffusion/interaction of aluminum with the stainless steel and characterize the constituents of the resulting interfacial layers. These techniq
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Lubarsky, Eugene, John T. Cutright, Ben T. Zinn, and Robert McAmis. "Spray Characterization at Jet Engine Thrust Augmentor Flow Conditions." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-50867.

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This paper describes experimental characterization of the spray formed by fuel jet injection in cross-flow under simulated modern augmentor operating conditions. Such data is needed to obtain a better understanding of the fundamental processes that control the performance of aircraft engine augmentors and to support the development of CFD based design tools. The study employed a single flame holder augmentor (SFA) model of a modern jet engine thrust augmentor with a cross-section of 76.2×152.4 mm (3×6 inches) located in a test setup with full optical access to the spray and flame zones provide
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FAKHERI, AHMAD, and SANDRA OLSON. "The effects of radiative heat loss on microgravity flame spread." In 27th Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics, 1989. http://dx.doi.org/10.2514/6.1989-504.

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Kokel, Philip, Craig Weinschenk, and O. A. Ezekoye. "Evaluation of Directional Flame Thermometer for Real-Time Inversion of Heat Flux." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22917.

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The Directional Flame Thermometer (DFT) is often used to measure heat flux during room fire testing. In literature and practice, heat transfer solutions for the DFT have been post processed. It is important to develop real-time capability for calculating heat flux based on measured temperatures as such capability will allow control of fire testing furnaces. In this study, we show that if a user will accept moderate errors in the heat flux, then a simple forward solution methodology allows heat flux measurements to be made in real-time. Essentially, the “inverse” problem is sufficiently well-co
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Christou, Thomas, Björn Stelzner, and Nikolaos Zarzalis. "Influence of Acoustically Excited Airflows on a Planar Airblast Prefilmer." In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-58862.

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Abstract In order to meet the higher requirements for clean combustion technology in aircraft engine applications and thus reduce harmful emissions, especially nitrogen oxide emissions, the major jet engine manufacturers are developing lean premixed prevaporized (LPP) combustors that operate at very high pressure. In this context, thermoacoustic instabilities may occur within the combustion chamber. The unsteady heat released by the flame generates pressure waves, which are coupled to the inlet air velocity by a feedback loop. This loop amplifies the instabilities of the inlet air velocity, wh
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Brown, Alexander L., and Thomas K. Blanchat. "A Validation Quality Heat Flux Dataset for Large Pool Fires." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47249.

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A series of experiments has been performed in the Sandia National Laboratories FLAME facility with a 2-meter diameter JP-8 fuel pool fire. Sandia heat flux gages were employed to measure the incident flux at 8 locations outside the flame. Experiments were repeated to generate sufficient data for accurate confidence interval analysis. Additional sources of error are quantified and presented together with the data. The goal of this paper is to present these results in a way that is useful for validation of computer models that are capable of predicting heat flux from large fires. We anticipate u
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