A5086834104- Combustion and flame dynamics
- Advanced Combustion Engine Technologies
- Radiative Heat Transfer Studies
- Fire dynamics and safety research
- Laser-Plasma Interactions and Diagnostics
- Combustion and Detonation Processes
- Laser-induced spectroscopy and plasma
- Nuclear Physics and Applications
- Turbomachinery Performance and Optimization
- Computational Fluid Dynamics and Aerodynamics
- Catalytic Processes in Materials Science
- High-pressure geophysics and materials
- Particle Dynamics in Fluid Flows
- Fluid Dynamics and Turbulent Flows
- Magnetic confinement fusion research
- Radiation Detection and Scintillator Technologies
- Refrigeration and Air Conditioning Technologies
- Cold Fusion and Nuclear Reactions
- Catalysis and Oxidation Reactions
- Energetic Materials and Combustion
- Fusion materials and technologies
- Gas Dynamics and Kinetic Theory
- Spectroscopy and Laser Applications
- Heat transfer and supercritical fluids
- Advanced Aircraft Design and Technologies
Lund University
2011-2025
Lawrence Livermore National Laboratory
2003-2024
University of Rochester
2012
Energetics (United States)
2012
Sandia National Laboratories
2012
General Atomics (United States)
2012
Massachusetts Institute of Technology
2012
Fusion Academy
2012
Fusion (United States)
2012
Atomic Weapons Establishment
2012
Laser Doppler velocimetry (LDV) measurement and large eddy simulation (LES) were used to study confined isothermal turbulent swirling flows in a model dump combustor. The aim was gain deeper understanding of the flow turbulence structures combustors examine capability LES for prediction flows. A refractive index matching technique is LDV improve near-wall data. high-order finite difference scheme on Cartesian grids with scale-similarity subfilter scale LES. Turbulent inflow boundary...
The first inertial confinement fusion implosion experiments with equimolar deuterium-tritium thermonuclear fuel have been performed on the National Ignition Facility. These use 0.17 mg of potential for ignition and significant yield conditions. has fielded as a cryogenic layer inside spherical plastic capsule that is mounted in center cylindrical gold hohlraum. Heating hohlraum 192 laser beams total energy 1.6 MJ produces soft x-ray field 300 eV temperature. ablation pressure produced by...
<title>Abstract</title> Industrial CO2 emissions, particularly from flue gases, pose significant challenges for climate change mitigation. Carbon capture, with bioenergy (BECCS), offers a pathway to negative emissions. This study models an MEA-based carbon capture system using operational data stand-alone pulp mill, focusing on its energy impact and optimization strategies. The analysis distinguishes between high-quality steam, critical electricity generation, waste heat, which can be...
An experimental and computational study of the near-wall combustion in a Homogeneous Charge Compression Ignition (HCCI) engine has been conducted by applying laser based diagnostic techniques combination with numerical modeling. Our major intent was to characterize velocity- thermal boundary layers. The progress studied using fuel tracer LIF, result which compared LDA measurements velocity layer along simulations reacting layer. Time resolved images PLIF signal were taken ensemble averaged...
CO2 has a strong impact on both operability and emission behaviours in gas turbine combustors. In the present study, an atmospheric, preheated, swirl-stabilised optical model combustor rig was employed. The primary objectives were to analyse influence of fundamental characteristics combustion, lean blowout (LBO) limits, CO flame structures. dilution effects examined with three preheating temperatures (396.15, 431.15, 466.15 K). combustion studied utilising chemical kinetic simulations. To...
Water introduction in the micro gas turbine (mGT) cycle is considered optimal route for waste heat recovery and flexibility increase of such a small-scale combined power (CHP) unit. However, humidification combustion air mGT affects stability, efficiency, exhaust emissions. This can lead to non-stable, incomplete combustion, which will affect global efficiency negatively. Additionally, CO emissions increase. The might result an engine shutdown due flameout. To study impact on methane...
Experiments that characterize and develop a high energy-density half-hohlraum platform for use in benchmarking radiation hydrodynamics models have been conducted at the National Ignition Facility (NIF). Results from experiments are used to quantitatively compare with simulations of transported through an evolving plasma density structure, colloquially known as N-wave. A is heated by 80 NIF beams temperature 240 eV. This creates subsonic diffusive Marshak wave, which propagates into atomic...
The modeling of industrial combustion applications today is almost exclusively based on two-equation turbulence models. Despite its known limitations, the most widely used model still standard k-ε model. objective this paper to investigate performance models applied a confined swirling flow. Numerical an axis-symmetric sudden expansion, followed by contraction with assumption steady flow and incompressible fluid, has been conducted. field what can be expected in simplified dump gas turbine...
The requirements for beam and target alignment successful ignition experiments on the National Ignition Facility (NIF) are stringent: average of beams to must be within 25 μm. Beam achieved with Target Alignment Sensor (TAS). TAS is a precision optical device that inserted into chamber center facilitate both alignment. It incorporates two camera views (upper/lower side) mounted each stage assemblies (jaws) view align target. also large mirror reflect onto upper/lower cameras located in using...
An atmospheric, variable-swirl combustor was used to study the influence of syngas composition on lean blowout (LBO) limit under various flow conditions created at different swirl numbers. The fuels in experiments consisted generic mixtures CO, H2, and CH4. results were compared those for CH4 same effect dilution LBO studied by adding N2 mixture. number varied changing ratio axial/tangential through inlet determined using laser Doppler anemometry (LDA). A perfectly stirred reactor (PSR)...
Flame stabilized by a bluff-body is common scene in many engineering applications due to the enhanced mixing characteristics, improved flame stability, and ease of combustion control. We recently designed burner which has conical bluff body with central air injector. In current work, effects jet on heat load body, structures blowoff limits were investigated. It was found that can significantly reduce body. considerable solution problem caused high practical applications. The blowout altered...
The Precision Robotic Assembly Machine was developed to manufacture the small and intricate laser-driven fusion ignition targets that are being used in National Ignition Facility. machine enables one person assemble a high-quality precision target 1 day with repeatable quality. assembly technician provides top-level control of machine, initiating controlling movement motorized instruments. Hand movements scaled at 100-nm level. Sensors embedded manipulator system provide 100-mg resolution...
Flame flashback from the combustion chamber to premixing section is a major operability issue when using high H2 content fuels in lean premixed combustors. Depending on flow-field combustor, can be triggered by different mechanisms. In this work, three mechanisms of H2/CH4 mixtures were visualized an atmospheric variable-swirl burner speed OH* chemiluminescence imaging. The mole fraction tested fuel varied between 0.1 and 0.9. combustor was changing swirl number 0.0 0.66 total air mass-flow...
The National Ignition Facility (NIF) is a 192-beam high energy laser designed for Inertial Confinement Fusion (ICF), and High Energy Density (HED) basic science experiments. In order to achieve ignition with an ICF target, the beam target alignment must be performed within very tight specifications. At same time, in able conduct wide range of HED experiments, facility meet tolerances both main offset backlighter beams targets. To diagnose event, many different diagnostics are employed,...