... and diamond arrays where air was the hot fluid and hydrogen gas was the cold fluid between the Reynolds numbers of 5,000 and 2e5. Better fits for drag coefficient and Nusselt number occurred when tortuosity and viscosity ratio were included as independent parameters. Given compressor inlet temperature and H2...

... Abstract Hydrogen is being considered as a possible path towards carbon-neutral aviation. There are additional advantages besides its main benefit of CO 2 -free combustion. One application is to use it for aero engine heat management due to its cryogenic temperature and high heat capacity...

... Abstract Post-combustion capture (PCC) by means of mono-ethanolamine (MEA) and hydrogen co-firing, combined with exhaust gas recirculation (EGR), were applied to a typical 2x1 combined cycle (CC) with the goal of reaching net-zero CO 2 emissions. The novelty lies in integrating decarbonization...

... Abstract Hydrogen combustion engines are one of the few possible ways forward to drastically reduce climate impact of aviation. While there is many information about the engine performance of hydrogen combustion engines it is not clear to which extend each property of the fuel switch effects...

... Abstract This study discusses a practical system utilizing the principle of physisorption where hydrogen is weakly bound to the surface of a nanoporous silica aerogel blanket as an alternative to high-pressure and cryogenic hydrogen storage. Three different experiments are conducted...

... Abstract Kawasaki (KHI) has made various improvements and commercialized hydrogen gas turbines for existing diffusion combustors (0–100 vol.% H 2 , wet combustion) and lean pre-mixed DLE combustors (0–30 vol.% H 2 ). However, it is challenging for conventional combustion technology to achieve...

... Abstract Hydrogen micromix combustion is a promising technology to reduce the environmental impact of both aero and land-based gas turbines by delivering carbon-free, and potentially ultra-low-NOx, combustion with a greatly reduced risk of autoignition or flashback. A preliminary investigation...

... Abstract Undiluted mixtures of ammonia/hydrogen (NH 3 /H 2 ) were auto-ignited inside the University of Central Florida’s high-pressure shock tube, allowing for lower temperature ignition data and realistic fuel concentrations to be experimentally tested and compared to chemical kinetic models...

... Abstract In line with the global drive to decarbonise energy systems, there is an urgent need to develop new dry low-NOx (DLN type) combustion concepts to enable efficient utilisation of alternative fuels, such as hydrogen. New combustor configurations require a detailed study of flame...

... Abstract This paper presents numerical predictions of the flow field in the swirl-stabilized OP16 DLE combustor using hydrogen as a fuel. Computational Fluid Dynamics (CFD) simulations employing unsteady Reynolds-Averaged Navier-Stokes (URANS) and Wall Modelled Large Eddy Simulations (WMLES...

... Abstract The transition to a decarbonised energy future relies on identifying the most suitable alternative fuels that can meet the needs of various energy sectors. While both ammonia and hydrogen are zero-carbon energy vectors, their physical properties and burning characteristics sit...

... Abstract The global push to combat climate change by transitioning to clean power generation is accelerating. One promising avenue involves utilizing low-carbon fuels like hydrogen and ammonia in place of conventional fossil fuels such as coal and natural gas, particularly in gas turbine-based...

... Abstract As the demand for hydrogen is expected to increase in the coming years, infrastructure requirements for the transport and storage of hydrogen should follow this trend to reduce its cost for users. For example, the European Hydrogen Backbone (EHB) represents a milestone toward a more...

... Abstract The present paper describes the design of a toroidal jet-stirred reactor (TJSR) for lean blowoff and emissions studies of ammonia-hydrogen mixtures at atmospheric pressure, with provisions for high-pressure testing in the future. The TJSR is a kind of well-stirred reactor experiment...

... Abstract Ammonia has been deemed an attractive option as a carbon-free fuel for power generation gas turbines to address greenhouse gas emissions and to deal with climate change. Recently, ammonia and its blends with hydrogen have been investigated as a prospective aviation fuel. However, high...

... Abstract Interest in using renewably produced, partially cracked ammonia in gas turbines is gaining traction, but challenges relating to emissions of NO x and unburned ammonia remain. The present work progresses existing research on using hydrogen stratification to reduce NO x from ammonia...

... Abstract Within the context of future aircraft turbine engine development technology, hydrogen has fast become one of the most favored candidates as an alternative fuel due to the possibility of producing extremely low levels of pollutants in particular NOx. The principal component...

... steam content and large recirculation zone for stability and flexibility (MILD -Moderate or Intense Low oxygen Dilution), has demonstrated high fuel-flexibility, i.e. hydrogen, syngas or methane, and high load flexibility. To demonstrate the technology, an atmospheric “fuel to flame” test rig has been...

..., hydrogen is a promising fuel for GTs and manufacturers are working on suitable combustor technologies. However, the availability of large quantities of CO 2 -free H 2 remains unclear in the near future. Other pollutants such as NO x and emissions due to incomplete combustion are formed differently...

... Abstract On the way to defossilization, green hydrogen is a promising way to substitute natural gas and oil in the gas turbine industry. In the scope of the H2mGT project, a micro gas turbine (mGT) burner with 100 % hydrogen firing is developed and validated. The project is funded...