Reducing Emissions: Parameter Sensitivity Analysis for the Conceptual Design of Military Transport Aircraft

The escalating concerns surrounding climate change underline the importance of examining greenhouse gas (GHG) emissions across various sectors, with aviation causing approximately 1.9% of the global GHG emissions in 2020. To this modest figure, the Dutch aviation industry acknowledges its share to the climate impact and has gone ahead to...

Analysis of weather-related uncertainties in the formation of persistent contrails

Climate Impact Assessment of Sustainable Aviation Fuels: A scenario based assessment of the climate impact of sustainable aviation fuels in the year 2125

Design of future ultra-high bypass ratio turbofans: A synergy of low-NOx combustion technologies

Is Aviation Technology going in the right direction regarding Climate Impact?

The aviation industry is shouting out its aim to reach ”net-zero carbon” by 2050. Nevertheless, air traffic is expected to grow up until then, and if fuel consumption is reduced by new technologies and aircraft, other sources of global<br/>warming such as N Ox emissions and contrails are less considered. Therefore, the climate impact improvement...

Contrail Formation: Exploring options for improving prediction methods on the Formation of Contrails from Modern Turbofan Engines

The validity of current prediction methods for the formation of contrails from modern turbofan engines is investigated. A modelling framework has been developed for estimating the impact of engine configurations on contrail formation by analyzing the physics of the mixing between core and bypass flow. Within this framework, Engine Performance...

Day and Night Contrail Climate Impact of Optimised Trajectories

Contrail formation is one the largest warming contributions of aviation’s climate impact. Measures to mitigate contrail climate impact include the optimisation of flight trajectories to avoid the formation of warming contrails or to find air space where extra cooling contrails are formed. The latter option is only possible during daytime, due to...

Aviation Emission Inventory: A contemporized bottom-up emission inventory for the year 2019

This report covers all major steps to establish an aviation emission inventory for 2019. This emission inventory is set up based on four consecutive steps. The first step is to gather all required data in the information model and this also includes some pre-processing of data to make it as complete as possible. The second step is to estimate...

Analysis of Climate Metrics for Aviation

The aviation industry continues to contribute to anthropogenic climate change. Recent studies have shown that the total radiative forcing from aviation is around three times higher than that from CO₂ alone. To account for the full effect of aviation, climate metrics are needed, which equate the environmental impact of various...

Climate Impact of Hydrogen Aviation: Research on the variations of surface temperature change caused by hydrogen and kerosene combustion aircraft

Concerned about rapidly rising temperatures, international institutions, nations, and companies worldwide examine how to reduce emissions in all economic sectors. Inside the aerospace sector, it is believed that hydrogen technology has the potential to be the best asset to fight global warming. This thesis aims to create and use a methodology to...

Sensitivity study of engine design parameters to climate impact

In the last few years, there has been a growing awareness regarding the climate impact of aviation in the general public. With global warming effects becoming more severe, it is important that aviation drastically reduce its emission footprint to keep the impact on the climate lower. There have been ongoing efforts by various organizations such...

An inter-comparison of the climate impact of short-, medium-, and long-range aircraft

Aviation has a growing impact on the earth’s climate, due to its emissions causing an increase in the global near-surface temperature. In order to better understand the dynamics by which different aircraft types contribute to this global warming and how this can be mitigated, the impact of different aircraft categories is analysed and compared....

Climate Effects of the Flying V

Climate impact from aviation becomes increasingly important. The Flying-V is a promising concept with superior aerodynamic efficiency and lower weight, leading to lower fuel consumption and lower CO2-emission compared to a tube-and-wing aircraft like the A350. Climate impact from non-CO2 effects (NOx-emission, H2O-emission and contrails) depends...

Optimization of an aero-enmgine using intercooling and inter-turbine burning

The thesis focusses on the effects that an intercooler (IC) and an inter­turbine burner (ITB) have on the cycle performance of a UBPR engine. The IC is located between the low­pressure compressor (LPC) and the high­pressure compressor (HPC). It exchanges heat between the core flow and the bypass flow reducing the temperature in the core flow....

Finding the Operating Limits and Optimal Configuration of an Electrically Assisted Turbofan

Hybrid electric propulsion is a promising new technology to reduce emissions and fuel consumption of an aircraft. In this study a parallel hybrid electric configuration is considered. Since electric motors supply power in the most demanding take-off and climb phases to achieve the required thrust, the turbofan can be redesigned.<br/><br/>It was...