Quantitative Analysis of Flame Kinematics in Premixed Hydrogen-Air-DNG Jet Flames using PIV Measurements and Flame Front Segmentation

Today's electricity supply falls short of current demands, leading to the utilization of gas turbines in both ground based and avionic infrastructures. Nevertheless, these often rely on carbon-based fuels, resulting in escalating CO2 emissions. However, adopting hydrogen as a fuel eliminates carbon emissions. Aside from zero carbon emissions,...

Determining the topology of hydrogen flame using computed tomography of chemiluminescence

With ongoing research towards clean combustion, hydrogen has been identified as a potential alternative to natural gas fuel, for example in power generation sectors utilizing gas turbines because of their inherent nature of being a carbon-free energy carrier. However, it is crucial to clarify that the ultimate goal is not just carbon-free...

Improving rowing performance by adjusting oar blade size and angle

A 1:5 scaled rowing boat had been designed by a previous research group to determine the performance of rowing blades with different sizes and blade angles. In this research modifications were done to allow more control of the rowing motion. The aim of this study is to assess whether an angled oar blade can reach faster speeds with the same...

Unraveling Flashback Phenomena of Turbulent premixed Hydrogen-Natural Gas-Air Flames

The growing energy demand and climate change poses a need for alternative energy generation in terms of renewable resources. Renewable energy resources are characterised by their intermittent behaviour. A backup power supply is required that can deliver electricity when the supply from the renewables is not sufficient. Gas turbines operating...

Boundary Layer Flashback of Turbulent Premixed Hydrogen/DNG/Air Flames produced by a Bunsen Burner

Due to the growing energy demand and global warming renewable energy is currently of interest. To deal with the production intermittency of renewable energy, energy might be stored in hydrogen. Hydrogen can be converted into electricity with a fuel cell or by combusting hydrogen in a gas turbine. Gas turbines are more suitable for large power...

Effect of H₂ Fuel-Addition and Air-Side CO₂ Dilution on the Stabilization of Turbulent Dutch Natural Gas Jet Diffusion Flames

The turbulent lifted Dutch natural gas jet diffusion flame in cold co-flowing air is widely used in gas turbine operation and subject of the current investigation. In striving to clean and sustainable combustion, adding hydrogen to the Dutch natural gas (DNG) fuel and CO2 in the coflow is promising. Objective of this investigation is to study...

Experiments on the drag of a flat plate moving parallel to an air-water interface

Rowing is a competitive sport where victory is determined by fine margins. In the past, the focus has been on optimizing the shell. Due to the increasing regulations placed on the shell design, the scope for manoeuvring in this area is greatly limited. This increases the necessity to focus on the less explored option of propulsion in rowing. The...

Experimental determination of the bubble size in foam created in gas-liquid flow with surfactants

In the gas industry there is a common problem during the production of gas, which is called liquid loading. This is the accumulation of water and condensed gas at the bottom of the pipe, through which gas is produced. This occurs when the gas velocity becomes insufficient to drag the liquid to the surface. From experience they know in the gas...

Experimental study of fluid flow in the bifurcation of a patient specific carotid artery, with severe stenosis: Comparing PIV, PC-MRI and CFD

Magnetic Drug Targeting is a relatively new technique whereby chemotherapeutic agents are attached to magnetic particles that will be injected in an artery upstream of an affected area. By exerting an external magnetic field an internal magnetic field gradient will be induced that will entrap the particles that contain the drugs in the affected...

Flame-wall interaction of a flame jet impinging normally on a cooled cylinder

The main objective of the present experimental investigation is to study the turbulent reacting flow field in the region where a stable premixed flame jet (Re = 3250 and ?= 1.3) impinges normally on a cooled cylinder and gain a better understanding of the effect of the cylinder wall temperature. PIV measurements were done in a plane normal to...

Large Eddy Simulations of Electromagnetic Control of a Quasi-2D Jet

This research aims to accurately predict the flow of electromagnetically conducting liquids liquid steel in a thin cavity. A thin cavity, with a thickness « width, is relevant as a model for a continuous steel caster mould. A turbulent jet flow enters the cavity, leading to a quasi-two-dimensional flow. Using large eddy simulations with the...

Characterization of the flow-field in circular subsonic impinging jets: Investigation of surface pressure fluctuations and far-field noise emissions through pressure sensor measurements

Impinging jets are relevant ow configurations in many technological developments. For example, on some short take-off and landing aircraft the high speed exhaust from the jet engine is deflected by direct impingement on the aps to create extra lift during take-off. Fatigue due to excessive dynamic loading on the aps and high levels of noise...

Effects of Reynolds number and density on a Jet-in-Hot-Coflow