Delphine Laboureur

Delphine Laboureur
von Karman Institute for Fluid Dynamics · Environmental and Applied Fluid Dynamics Department

Professor

About

58
Publications
19,826
Reads
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714
Citations
Introduction
Additional affiliations
April 2018 - January 2019
von Karman Institute for Fluid Dynamics
Position
  • Professor (Assistant)

Publications

Publications (58)
Article
The release of high-speed gas jets due to a tank leakage can pose a substantial safety hazard, as it can give rise to flammable, explosive, or toxic mixtures. Hence, understanding jet dispersion in real-world conditions is crucial for designing effective safety measures. Existing targeted or traceable studies provide velocity field data, but limita...
Article
Full-text available
This work discusses the results of the temperature measurements performed on a water-based slurry, seeded with polystyrene spherical particles and flowing in a heated horizontal pipe. The flow is fully turbulent, characterized by a Reynolds number between 4500 and 14000. Two particle size distributions are tested (with mean diameter of 0.35 mm and...
Conference Paper
Investigating Fiber Bragg Gratings (FBG) behavior in varied fluid environments for temperature measurements. Analysis includes secondary effects and liquid metal influence on peak spectrum.
Article
Full-text available
Turbulent heat fluxes (THFs) estimation is of paramount importance in the determination of heat transfer in fluids. Numerical models for low Prandtl number fluids are still unreliable and their experimental evaluation is a challenging task since it requires simultaneous measurement of fast velocity and temperature fluctuations. In nuclear applicati...
Article
Full-text available
The ballistics field is known by the presence of several complex phenomena such as muzzles and flying projectiles flow fields. Consequently, numerical simulations are commonly used to model these complicated flows. However, the validation process of these codes has proven to be problematic due to the lack of experimental quantitative data. In this...
Article
In evaporators, the distribution of the liquid and vapor phases among the channels is a convoluted problem, depending on a wide range of parameters. However, maldistribution causes important losses of performance. Due to their complexity, the accurate modeling of such two-phase flows is difficult to handle. Hence, experimental studies are still of...
Conference Paper
In the context of intermediate ballistics, a thorough understanding of the muzzle flow is necessary to optimize the design of muzzle devices and long-range projectiles. However, due to the harsh environment, the extremely short duration, and the transient evolution of the intermediate ballistics phase, both experimental and flow modeling efforts ar...
Article
A deep understanding of muzzle flow fields is essential for optimizing muzzle devices and projectile design. This flow characterization has been heretofore limited to local and intrusive measurement techniques such as pressure measurements using pencil probes. Consequently, the quantitative experimental data are limited, so are the number of numeri...
Article
Background-oriented schlieren (BOS) technique is a density-based optical measurement technique. BOS measurement is similar to particle image velocimetry (PIV) ones in terms of experiments design and the computation of the displacements. However, in the BOS technique, the reconstruction of the refractive index field involves further mathematical cal...
Conference Paper
The void fraction is one of the key quantities to measure to fully characterize a liquid vapor two-phase flow and to predict crucial properties for the design of condensers and evaporators such as the friction factor and the heat transfer coefficient in a given channel. These flows are involved in evaporators and are found in several processes in t...
Article
Background-oriented schlieren (BOS) is an optical visualization technique that reconstructs a whole-field flow based on its density gradient. Thanks to the cost-effectiveness of its optical setup and its unlimited field of view, BOS has become an attractive technique for laboratory and large-scale experiments. In BOS, the reconstruction of the refr...
Article
A better understanding of the wind-wave direction effect on the wind field and on the momentum transfer at the air-sea interaction will aid in the development of numerical atmospheric and wave models, important for wind energy studies among other applications. So far, the effect of opposed wind-wave directions on the wind field is not fully underst...
Article
Full-text available
Quantifying the train-induced wind affecting the climate of subway stations can be applied to improve underground networks air quality. In this paper, numerical simulations of train-induced airflow in a subway station are performed, using a CFD model with dynamic meshing techniques. A preliminary study is done in a double-track tunnel with blockage...
Article
Full-text available
A quantitative study on the aging behavior of aluminum nanopowders is presented. While previous studies in literature focused on a few conditions of temperature and/or humidity, towards an understanding of the physical process behind the aging, no study investigated yet sufficient conditions to develop an accelerated aging model specific to aluminu...
Article
Full-text available
Validation of the Cabrera-Mott low-temperature oxidation model is proposed to better establish a procedure for the passivation of aluminum nanoparticles after production. The powder, generated in an inductively coupled plasma reactor and characterized by a specific surface of around 40 m2/g, is sampled prior to passivation. Controlled oxidation of...
Article
This work attempts to solve two fundamental problems that can be encountered when solving kinetic equations using quadrature based moment methods (QBMM). These two problems are considered crucial problems since they are observed even in the simplest particulate systems. On the one hand, we have that particle trajectory crossing (PTC) events can lea...
Article
Full-text available
Disasters caused by large‐scale ammonium nitrate (AN) detonations initiated by fires are well known. The Beirut explosion is again a very sad event with disastrous consequences, but it is not a surprise in the sense of a new phenomenon. It is tragic that calamities with AN occur despite ample guidelines for prevention. Knowledge of the decompositio...
Article
Propane is used in various products regularly in day to day life. Often the hazards due to consumer propane products are overlooked. The events due to consumer propane are usually medium- to high-frequency low-consequence events. The present study analyzes the trends in injuries from 2002 to 2016 with various factors like sex, location, time, and a...
Article
Pressurized liquefied gases such as carbon dioxide are transported at a pressure above their saturation pressure. Therefore, if a pipeline transporting this substance ruptures, an abrupt expansion occurs, causing the flashing of the fluid. Computational tools that predict how fast a depressurization develops, help to assess the consequences of pote...
Conference Paper
Full-text available
This paper presents the results of the aerothermal characterization of two additive manufactured offset strip fins Compact Heat Exchanger (CHX) modules, in the framework of the European project NATHENA (New Additive ManufacTured Heat ExchaNgers for Aeronautics). The two samples, with the same dimensions and internal fins geometry, differ for the ma...
Article
Aluminum nanopowder oxidation is mostly experimentally studied through thermogravimetric analysis (TGA) combined with differential scanning calorimetry (DSC). These types of analyses are very sensible to a variety of parameters such as the heating rate, oxidizing gas composition or sample mass. Also, theoretical models of aluminum nanopowder oxidat...
Article
The atmospheric dispersion in an urban or industrial environment is well documented in the literature. However, there is a lack of knowledge about the dispersion triggered by rapid and short phenomena such as explosions. The presented research provides information about the pollutant dispersion caused by a condensed-phase detonation in an urban env...
Article
Predicting a kick timely and efficiently is often a challenging task due to the complexities of drilling and other well intervention activities. This work proposes a leading indicators-based approach to assess drilling operations for predicting kicks and preventing blowouts. A cause-based methodology is proposed to develop sets of leading indicator...
Article
The objective of this experimental research work is to determine several key parameters of an LNG pool fire on land through a field test. The pool fire was conducted in the largest pit at Brayton Fire Training Field in College Station, Texas. The mass burning rate was 0.186 kg/(s m2) using the thermocouple method. Through the analysis of images fro...
Conference Paper
Full-text available
This study aims to investigate the pollutant dispersion driven by a condensedphase explosion in an urban environment. A gram-scale explosion, leading to the dispersion of solid particles, is experimentally simulated in free field under a controlled urban atmospheric boundary layer. The effect of the powder on the blast and the symmetry of the explo...
Article
Experimental studies of blast propagation in urban environments are described in the literature, but only a few studies at laboratory scale were found while this scale option represents an economical and safe approach. Experimental investigations on blast wave propagation in a complex environment using gram-range explosive charges are proposed in t...
Article
Offshore operations have always been very challenging due to technological and operational complexities in combination with harsh environmental conditions. Geological uncertainties, high pressure flammable fluids in the presence of ignition sources, complicated structural layouts, limited response time allowance, difficulty of control and communica...
Article
On December 7, 2009, a 50-foot-tall high-pressure vessel ruptured in the Nihon Dempa Kogyo Crystal, Inc. facility in Belvidere, Illinois. Several projectiles rapidly traveled outward from the facility, killing a truck driver 650 feet away and injuring an employee in another building 435 feet away. This paper summarizes the lessons learned from this...
Article
An experimental study of jet fires is performed to understand the flame geometry of jet fires. Horizontal jet fire experiments are performed by varying the mass flow rate of fuel through a 19 mm nozzle. The exit velocities varied from 25-210 m/s, flame lengths from 1-6 m and Froude Numbers from 2x103 to 2×105. The experimental measurement includes...
Article
In West, Texas on April 17, 2013, a chemical storage and distribution facility caught fire followed by the explosion of around 30 tons of ammonium nitrate while the emergency responders were trying to extinguish the fire, leading to 15 fatalities and numerous buildings, businesses and homes destroyed or damaged. This incident resulted in devastatin...
Article
Jet fires are one of the major hazards in the oil and gas industry, and half of the reported jet fires caused a domino effect that enlarged the incident. Previous work with propane focused on vertical jet fires. In this work, both horizontal and vertical fires were studied through 21 tests conducted at the Brayton Fire Training Field. The fires wer...
Article
The overpressure produced by the boiling liquid expanding vapour explosion (BLEVE) is still not well understood. Various methods have been published on the overpressure modeling in the far field. They mostly differ by the modeling of the expansion energy, used to scale the distance to the source where the overpressure needs to be calculated. But th...
Conference Paper
Jet fires are among the least severe fires in terms of direct effects, but are very important in terms of risk assessment due to the potential escalation of the incident by impingement or engulfment of the jet fire on the surrounding vessel, pipework or other components. This paper focuses on the determination of the main geometrical features (flam...
Conference Paper
On December 7, 2009, a 50-foot-tall high-pressure vessel ruptured in the Nihon Dempa Kogyo Crystal, Inc. facility in Belvidere, Illinois. Several projectiles rapidly travelled outward from the facility, killing a truck driver 650 feet away and injuring an employee in another building 435 feet away. This paper summarizes the lessons learned from thi...
Article
Full-text available
BLEVE overpressure modeling has been already widely studied but only few validations including the scale effect have been made. After a short overview of the main models available in literature, a comparison is done with different scales of measurements, taken from previous studies or coming from experiments performed in the frame of this research...
Article
Boilover is defined as a violent ejection of fuel due to the vaporization of a water sub-layer, resulting in an enormous fire enlargement and formation of fireball and ground fire. This paper focuses on the physical principles behind the thin-layer boilover phenomenon, and on the improvement of the thin-layer boilover modeling. Small scale field an...
Conference Paper
Modélisation d’un régénérateur à rouleaux Jean-Marie BUCHLIN1, Delphine LABOUREUR1, Philippe PLANQUART1 & Michel RENARD2 1 Institut von Karman de Dynamique des Fluides, Rhode-Saint-Genèse, Belgique 2 DREVER International, Angleur, Belgique *(auteur correspondant : buchlin@vki.ac.be) Résumé - L’étude propose un modèle analytique du comportement ther...
Conference Paper
Full-text available
The most dangerous accident that can occur in LPG storage is the boiling liquid expanding vapor explosion (BLEVE). To better understand the rupture of the reservoir and the blast wave characteristics, small scale BLEVE experiments are performed with cylinders of 95 ml, filled at 86% with propane, laid horizontally and heated from below. A weakening...
Conference Paper
BLEVE overpressure: small scale experiments and multi-scale comparison with literature survey of blast wave modeling The most dangerous accident that can occur in storage of liquefied petroleum gas (LPG) is the boiling liquid expanding vapor explosion (BLEVE). The BLEVE is defined as an explosion resulting from the failure of a vessel containing a...
Conference Paper
Full-text available
A multi-scale comparison between the different methods to evaluate the overpressure generated by a boiling liquid expanding vapor explosion (BLEVE) published in literature with experiments, was carried out. The models of Prugh, TNO, Roberts, Casal, Planas-Cuchi, Birk, and Genova were compared with large scale experiments of Johnson and BAM, mid-sca...
Article
The Taylor-Culick flow corresponds to the flow injection through the lateral wall of a semi-infinite channel. This flow is intrinsically unstable downstream of a critical axial position. The flow disturbances develop in vortices that could couple with the acoustics of the channel, generating pressure oscillations. This is what occurs in large solid...
Conference Paper
Pressure oscillations that occur in the boosters of Ariane 5 are explained through a coupling between acoustics and flow disturbances. One of these disturbances is called Surface Vortex Shedding (SVS), which comes from the natural instability of the Taylor flow induced by the propellant combustion. Depending mainly on the Reynolds number (based on...
Article
Full-text available
Résumé -Le Boilover est un phénomène de moussage de grande ampleur résultant de la vaporisation violente d'une nappe d'eau située au fond des réservoirs atmosphériques en feu. Cet article présente les résultats d'une campagne expérimentale visant à mieux comprendre les conditions d'apparition et les conséquences de ce phénomène, montrant l'influenc...

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