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Book
Experiments and Numerical Simulations of Diluted Spray Turbulent Combustion : Proceedings of the 1st International Workshop on Turbulent Spray Combustion
Authors: --- --- ---
ISBN: 9400714084 9400714092 Year: 2011 Publisher: Dordrecht : Springer Netherlands : Imprint: Springer,

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This book reflects the outcome of the 1st International Workshop on Turbulent Spray Combustion held in 2009 in Corsica (France). The focus is on reporting the progress of experimental and numerical techniques in two-phase flows, with emphasis on spray combustion.  The motivation for studies in this area is that knowledge of the dominant phenomena and their interactions in such flow systems is essential for the development of predictive models and their use in combustor and gas turbine design. This necessitates the development of accurate experimental methods and numerical modelling techniques.  The workshop aimed at providing an opportunity for experts and young researchers to present the state-of-the-art, discuss new developments or techniques and exchange ideas in the areas of experimentations, modelling and simulation of reactive multiphase flows. The first two papers reflect the contents of the invited lectures, given by experts in the field of turbulent spray combustion. The first  concerns computational issues, while the second deals with experiments. These lectures initiated very interesting and interactive discussions among the researchers, further pursued in contributed poster presentations. Contributions 3 and 4 focus on some aspects of the impact of the interaction between fuel evaporation and combustion on spray combustion in the context of gas turbines, while the final article deals with the interaction between evaporation and turbulence.

Keywords

Experiments. --- Spray combustion -- Congresses. --- Spray combustion -- Experiments. --- Two-phase flow --- Spray combustion --- Engineering --- Hydraulic engineering --- Civil & Environmental Engineering --- Chemical & Materials Engineering --- Engineering & Applied Sciences --- Applied Mathematics --- Civil Engineering --- Chemical Engineering --- Turbulence --- Combustion --- Engineering. --- Fluids. --- Phase transitions (Statistical physics). --- Electric power production. --- Physical measurements. --- Measurement. --- Thermodynamics. --- Heat engineering. --- Heat transfer. --- Mass transfer. --- Fluid mechanics. --- Engineering Fluid Dynamics. --- Engineering Thermodynamics, Heat and Mass Transfer. --- Phase Transitions and Multiphase Systems. --- Energy Technology. --- Measurement Science and Instrumentation. --- Fluid- and Aerodynamics. --- Hydromechanics --- Continuum mechanics --- Mass transport (Physics) --- Thermodynamics --- Transport theory --- Heat transfer --- Thermal transfer --- Transmission of heat --- Energy transfer --- Heat --- Mechanical engineering --- Chemistry, Physical and theoretical --- Dynamics --- Mechanics --- Physics --- Heat-engines --- Quantum theory --- Measuring --- Mensuration --- Mathematics --- Technology --- Metrology --- Physical measurements --- Measurements, Physical --- Mathematical physics --- Measurement --- Electric power generation --- Electricity generation --- Power production, Electric --- Electric power systems --- Electrification --- Phase changes (Statistical physics) --- Phase transitions (Statistical physics) --- Phase rule and equilibrium --- Statistical physics --- Hydraulics --- Hydrostatics --- Permeability --- Construction --- Industrial arts --- Hydraulic engineering. --- Energy Systems. --- Engineering, Hydraulic --- Fluid mechanics --- Shore protection --- Energy systems. --- Measurement   .


Digital
Methods and techniques for fire detection : signal, image and video processing perspectives
Authors: --- --- --- ---
ISBN: 9780128026175 0128026170 Year: 2016 Publisher: London, UK Academic Press is an imprint of Elsevier

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Dissertation
Review of the passive fire protection requirements in Belgium, The Netherlands and France
Authors: --- ---
Year: 2021 Publisher: Leuven KU Leuven. Faculteit Ingenieurswetenschappen

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At European level, fire safety legislation falls entirely within the competence of the Member States (MS), unlike the Construction Products Regulation and the harmonised Eurocodes. The consequence of this European approach has led to the development of different perspectives regarding fire safety legislation that are being used by the MS. On the other hand, fire safety legislation in each MS is being composed in a different way. Besides national regulations, fire safety legislation may be shaped on other levels as well such as on regional level, by the mayor on municipal level or by the fire department. Due to the shared objective of obtaining an adequate level of safety in all MS, and given that serious fire accidents have occurred in the recent past, the decentralised approach to fire safety has been criticised. In terms of the fire safety of buildings, one can say that the EU does not provide a comprehensive approach. The lack of a framework to address fire safety legislation in a harmonised manner is recognised, as well as the need to do so equally in all Member States. Secondly, a growing need for harmonious cooperation between MS, and the joint resolution of fire safety problems in buildings is tangible. This raises the question as to whether or not there is an overlap of fire safety legislation between the various MS and how the differences and similarities are reflected. In this research, an attempt is made to shed light on these unanswered questions. A comparative study between Belgium, The Netherlands and France will reveal the similarities and differences between these countries with the aim of encouraging the harmonisation of fire safety legislation of buildings on European level. The emphasis of the aspects examined is placed on the passive fire protection requirements with specific attention to compartmentation, evacuation and building elements such as structural elements, walls, (interior) doors, ceilings and facades. Increased risk profiles will not be included in this research. Specifically, this concerns schools, hospitals, industries, and underground car parks. On the basis of an analysis of the national legislation of these three countries, a comprehensive table was established for each country containing all passive fire protection requirements of buildings. Subsequently, an overall table was drawn up covering all three countries. The results show that there are large differences in the harmonisation of national fire safety legislation, that each country has a different classification, that the fire resistance values (REI values) are not uniquely used in countries and that differences exist between a comparative table across the three countries. The overall table shows that the emphasis is different across countries on certain aspects. Finally, the recommendations give a direction as to how harmonisation of fire safety legislation in Europe can be promoted. Remarkably, the shortcomings of the prescriptive approach, such as the over-regulation of some aspects, and the complicated explanations of some articles, become apparent here as well.

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Dissertation
Exploratory study of the temporal evolution of pressure due to fire in enclosures relevant for the nuclear industry by means of zone models
Authors: --- ---
Year: 2021 Publisher: Leuven KU Leuven. Faculteit Ingenieurswetenschappen

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Both for industrial and private buildings insulation is an important factor. Insulation will be described by the airtightness of the compartment and the boundary condition insulation used. Insulation and airtightness are important to residential buildings because of the need to be energy efficient. This is for economic and ecological reasons. Like the residential reasoning, the industry can benefit from high insulation grades and airtightness of compartments. For example; the nuclear industry. It is clear to see when working with radioactive substances, these substances need to be contained. Airtightness and insulation will be parts of this containment plan. Airtightness and high insulation grades also have a disadvantage relevant to safety. Fire in airtight and well-insulated compartments results in increased compartment pressures due to the release of hot combustion gasses of the fire. This results in safety hazards. Due to high peak values for positive and negative pressures, structures can be permanently damaged leading to possible collapses. Another hazard is entrapment of people in compartments due to increased compartment pressure. Increased compartment pressure will prevent a door from being opened, as little as 100-200Pa pressure difference could be enough to hinder evacuation. When being entrapped, not only the possibility of a building collapse is imminent, but also the heat and intoxication are hazardous to people. Being able to realistically assess what is going on in a compartment during a fire is key in keeping people safe in and around the impacted compartments. Knowledge of what is going on inside a compartment is key to being able to mitigate the outcome of such an accident. Researching or investigating a fire and its impact on the pressure, temperature and other variables in a compartment can be achieved by using zone modelling tools. In this thesis two tools are used called CFAST and Fortran. CFAST or ‘Consolidated Fire And Smoke Transport model’ is a program created by NIST or the ‘National Institute of Standards and Technology’. Fortran is a coding language. A basic zone modelling code is written using the formulas found in report. The Fortran code is created and discussed in thesis [2]. The Fortran code is a more basic version of the CFAST zone modelling program. A comparison is performed between the two zone modelling tools in this thesis. Experiments performed and documented in publication [1] are used to compare the two tools. The experiments describe a fire in a well-confined room, an admission and an extraction fan are mounted to the compartment ceiling. A propane burner is used as a fire load. The compartment and ducting have several measuring devices installed for data acquisition. First the Fortran code is extensively verified because of missing information in the original text. This is called ‘functional testing’ (see chapter 3). After that, the CFAST program is installed and this installation is verified. Chapters 4.5 until 4.7.3 describe the comparison between the two zone modelling tools. During the comparison several findings were observed and highlighted. These findings are summarised in the conclusion in the form of advantages, disadvantages and improvement suggestions (see chapter 5). The thesis is ended by describing some future work suggestions and final thoughts. This is very important because this thesis documents how to simulate using both tools and what the pitfalls or differences are.

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Dissertation
Scenario Construction for Road Tunnel Fire Accident and Multiple Correspondence Analysis
Authors: --- ---
Year: 2018 Publisher: Leuven KU Leuven. Faculteit Ingenieurswetenschappen

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The fire accident in road tunnels can lead to harmful consequence for commuters, as the risk of being killed is higher than open roads. The study of these accidents is limited to some extent. This thesis focuses on multiple risk influencing factors of vehicle collision, scenario construction for understanding tunnel accidents and analysis of large tunnel data using Multiple Correspondence Analysis (MCA). The real-life tunnel accidents are hard to reconstruct due to lack of information gathering and association of different parameters within statistical data. We construct 26 independent accidents with different combination of parameters (tunnel length, tunnel zones, gradient, etc.). The absence of description and graphical representation in tunnel collisions is compensated by assigning a unique data representation for the constructed scenarios. Risk variables or risk factors with multiple categories without any quantitative value is represented as labels. For example, in our thesis the tunnel type is a risk variable which consists of two categories (unidirectional tunnel and bidirectional tunnel). Analysing large amount of nominal data for accident scenarios is done by MCA as it quantifies the categorical value for each representation within an accident. The output obtained is a lower dimensional map of individual scenarios and its categorical variables. This map is directly interpreted for its association from pattern recognition within each scenario. The aim is to show a good data representation for reconstruction of real time accidents and to analyse large categorical crash data for a single tunnel or combination of tunnels.

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