CERES Home
→
School of Aerospace, Transport and Manufacturing (SATM)
→
Staff publications (SATM)
→
Browsing Staff publications (SATM) by Author

Browsing Staff publications (SATM) by Author "Nikolaidis, Theoklis"

Now showing items 1-20 of 86

Abating CO2 and non-CO2 emissions with hydrogen propulsion

Mourouzidis, Christos; Singh, G.; Sun, X.; Huete, Jon; Nalianda, Devaiah; Nikolaidis, Theoklis; Sethi, Vishal; Rolt, Andrew Martin; Goodger, E.; Pilidis, Pericles (Cambridge University Press (CUP), 2024-04-02)

This contribution focuses on the abatement with hydrogen of CO2 and non-CO2 emissions. It is agenda-setting in two respects. Firstly, it challenges the globally accepted hydrocarbon sustainable aviation fuel (SAF) pathway ...
Advanced control algorithm for FADEC systems in the next generation of turbofan engines to minimize emission levels

Aghasharifian Esfahan, Majid; Namazi, Mohammadmehdi; Nikolaidis, Theoklis; Jafari, Soheil (MDPI, 2022-05-23)

New propulsion systems in aircrafts must meet strict regulations and emission limitations. The Flightpath 2050 goals set by the Advisory Council for Aviation Research and Innovation in Europe (ACARE) include reductions of ...
Advanced optimization of gas turbine aero-engine transient performance using linkage-learning genetic algorithm: Part Ⅰ, Building blocks detection and optimization in runway

Liu, Yinfeng; Jafari, Soheil; Nikolaidis, Theoklis (Elsevier, 2020-08-15)

This paper proposes a Linkage Learning Genetic Algorithm (LLGA) based on the messy Genetic Algorithm (mGA) to optimize the Min-Max fuel controller performance in Gas Turbine Engine (GTE). For this purpose, a GTE fuel ...
Advanced optimization of gas turbine aero-engine transient performance using linkage-learning genetic algorithm: Part Ⅱ, Optimization in flight mission and controller gains correlation development

Liu, Yinfeng; Jafari, Soheil; Nikolaidis, Theoklis (Elsevier, 2020-08-15)

This paper proposes a Linkage Learning Genetic Algorithm (LLGA) based on the messy Genetic Algorithm (mGA) to optimize the Min-Max fuel controller performance in Gas Turbine Engine (GTE). For this purpose, a GTE fuel ...
Aircraft thermal management: Practices, technology, system architectures, future challenges, and opportunities

van Heerden, Albert S. J.; Judt, David M.; Jafari, Soheil; Lawson, Craig P.; Nikolaidis, Theoklis; Bosak, D. (Elsevier, 2021-11-12)

The provision of adequate thermal management is becoming increasingly challenging on both military and civil aircraft. This is due to significant growth in the magnitude of onboard heat loads, but also because of their ...
Analyses of a high pressure ratio intercooled direct Brayton helium gas turbine cycle for Generation IV reactor power plants

Gad-Briggs, Arnold; Pilidis, Pericles; Nikolaidis, Theoklis (ASME, 2016-12-20)

The intercooled cycle (IC) as an alternative to the simple cycle recuperated (SCR) and intercooled cycle recuperated (ICR) is yet to be fully analyzed for the purpose of assessing its viability for utilization within ...
Analyses of long term off-design performance strategy and operation of a high pressure ratio intercooled Brayton helium gas turbine cycle for generation IV nuclear power plants

Gad-Briggs, Arnold; Pilidis, Pericles; Nikolaidis, Theoklis (ASME, 2018-05-23)

The Intercooled Cycle (IC) is a simplified novel proposal for Generation IV Nuclear Power Plants (NPP) based on studies demonstrating efficiencies of over 45%. As an alternative to the Simple Cycle Recuperated (SCR) and ...
Analyses of the associated technical and economic risks of the simple and intercooled Brayton helium recuperated gas turbine cycles for Generation IV nuclear power plants

Gad-Briggs, Arnold; Pilidis, Pericles; Nikolaidis, Theoklis (ASME, 2018-11-30)

The Simple Cycle Recuperated (SCR) and Intercooled Cycle Recuperated (ICR) are highly efficient Brayton helium gas turbine cycles, designed for the Gas-cooled Fast Reactor (GFR) and Very-High-Temperature Reactor (VHTR) ...
Analyses of the costs associated with very high turbine entry temperatures in helium recuperated gas turbine cycles for Generation IV nuclear power plants

Gad-Briggs, Arnold; Pilidis, Pericles; Nikolaidis, Theoklis (ASME, 2018-08-27)

Previous analyses of Generation IV (GEN IV) helium gas turbine cycles indicated the possibility for high Turbine Entry Temperatures (TETs) up to 1200°C in order to improve cycle efficiency, using improved turbine blade ...
Analyses of the effect of cycle inlet temperature on the precooler and plant efficiency of the simple and intercooled helium gas turbine cycles for generation IV nuclear power plants

Gad-Briggs, Arnold; Nikolaidis, Theoklis; Pilidis, Pericles (MDPI, 2017-03-24)

Nuclear Power Plant (NPP) precooler coolant temperature is critical to performance because it impacts the work required to increase the coolant pressure. Variation of the coolant temperature results in varied precooler hot ...
Analyses of the load following capabilities of Brayton Helium gas turbine cycles for generation IV nuclear power plants

Gad-Briggs, Arnold; Pilidis, Pericles; Nikolaidis, Theoklis (ASME, 2017-06-09)

The control system for Generation IV Nuclear Power Plant (NPP) design must ensure load variation when changes to critical parameters affect grid demand, plant efficiency and component integrity. The objective of this study ...
Analysis of control-system strategy and design of a small modular reactor with different working fluids for electricity and hydrogen production as part of a decentralised mini grid

Gad-Briggs, Arnold; Osigwe, Emmanuel O.; Jafari, Soheil; Nikolaidis, Theoklis (MDPI, 2022-03-18)

Hydrogen is increasingly being viewed as a significant fuel for future industrial processes as it offers pathways to zero emission. The UK sees hydrogen as one of a handful of low-carbon solutions for transition to net ...
Assessment of numerical radiation models on the heat transfer of an aero-engine combustion chamber

Gamil, Abdelaziz A. A.; Nikolaidis, Theoklis; Lelaj, Indrit; Laskaridis, Panagiotis (Elsevier, 2020-11-02)

Thermal radiation is the most dominant type of heat transfer inside the combustion chamber, which can directly affect the temperature distributions at the combustor walls. This paper provides a comprehensive analysis of ...
Assessment of surface roughness effects on micro axial turbines

Gamil, Abdelaziz A. A.; Nikolaidis, Theoklis; Teixeira, Joao Amaral; Madani, S. H.; Izadi, Ali (ASME, 2021-01-11)

Surface roughness significantly affects the aerodynamics and heat transfer within micro-scale turbine stages. It results in a considerable increment in the blade profile loss and leads consequently to sizeable performance ...
Benefits, drawbacks, and future trends of Brayton helium gas turbine cycles for gas-cooled fast reactor and very-high temperature reactor Generation IV nuclear power plants

Gad-Briggs, Arnold; Osigwe, Emmanuel O.; Pilidis, Pericles; Nikolaidis, Theoklis; Sampath, Suresh; Teixeira, Joao Amaral (American Society of Mechanical Engineers, 2020-10-02)

Numerous studies are on-going on to understand the performance of generation IV (Gen IV) nuclear power plants (NPPs). The objective is to determine optimum operating conditions for efficiency and economic reasons in line ...
A combined technique of Kalman filter, artificial neural network and fuzzy logic for gas turbines and signal fault isolation

Togni, Simone; Nikolaidis, Theoklis; Sampath, Suresh (Elsevier, 2020-06-18)

The target of this paper is the performance-based diagnostics of a gas turbine for the automated early detection of components malfunctions. The paper proposes a new combination of multiple methodologies for the performance-based ...
Combustor development and performance analysis for recuperated microturbine application

Liu, Yize; Nikolaidis, Theoklis; Gamil, Abdelaziz; Madani, Seyed Hossein; Sarkandi, Mohammad (AIAA, 2021-07-28)

In recent years, increased attention is paid to the microturbine MGT as a promising technology for combined heat and power (CHP) applications. An MGT has advantages of high reliability, high efficiency, lower manufacturing ...
Comparing different schemes in a combined technique of Kalman filter, artificial neural network and fuzzy logic for gas turbines online diagnostics

Togni, Simone; Nikolaidis, Theoklis; Sampath, Suresh (American Society of Mechanical Engineers, 2022-10-28)

The paper presents research on the online performance-based diagnostics by implementing a novel methodology, which is based on the combination of Kalman Filter, Artificial Neural Network, Neuro-Fuzzy Logic and Fuzzy Logic. ...
Comparison of sodium sulphate deposition rate models based on operational factors influencing hot corrosion damage in aero-engines

Pontika, Evangelia; Laskaridis, Panagiotis; Nikolaidis, Theoklis; Koster, Max (American Society of Mechanical Engineers, 2021-01-11)

Hot corrosion is defined as the accelerated oxidation/sulphidation in the presence of alkali metal molten salts. It is a form of chemical attack that causes good metal loss. Current lifing models in aircraft engines focus ...
Compressor degradation management strategies for gas turbine aero-engine controller design

Sun, Xiaohuan; Jafari, Soheil; Fashandi, Seyed Alireza Miran; Nikolaidis, Theoklis (MDPI, 2021-09-10)

The Advisory Council for Aeronautics Research in Europe (ACARE) Flight Path 2050 focuses on ambitious and severe targets for the next generation of air travel systems (e.g., 75% reduction in CO2 emissions per passenger ...

Browsing Staff publications (SATM) by Author "Nikolaidis, Theoklis"

Browsing Staff publications (SATM) by Author "Nikolaidis, Theoklis"

Search CERES

Browse

All of CERES

This Collection

My Account