Explore Prof. Dr. Yasin Şöhret’s research on aircraft propulsion, energy efficiency, thermodynamics and the future of sustainable flight.
The future of flight is increasingly being discussed through a different set of questions. How efficiently can an aircraft engine use energy? Where are the real performance losses? How can engineers evaluate environmental impact without reducing sustainability to a single emissions figure? These questions sit at the intersection of engineering, energy and environmental science, and they form an important part of Prof. Dr. Yasin Şöhret’s academic work.
Şöhret is a Turkish engineer, scientist, academic and author whose research spans aircraft propulsion, thermodynamics, energy and environmental performance. Rather than treating these fields as separate subjects, his work approaches aviation as an interconnected engineering system in which propulsion efficiency, energy use and environmental consequences need to be evaluated together.
Who Is Prof. Dr. Yasin Şöhret?
Prof. Dr. Yasin Şöhret is an academic whose scientific work focuses primarily on aviation, propulsion systems, thermodynamics, energy analysis and environmental performance. His official academic website describes his research through three closely connected areas: Sustainable Aviation, Propulsion & Thermodynamics, and Energy & Environment.
His academic background combines mechanical engineering with aviation-focused postgraduate research. Earlier academic records published by Springer identify his undergraduate education in Mechanical Engineering at Eskişehir Osmangazi University and his doctoral studies in Aircraft Maintenance at Anadolu University. His academic career has subsequently been associated with Süleyman Demirel University.
What makes this combination interesting is the overlap between traditional engineering analysis and contemporary sustainability questions. Aircraft engines are thermal systems, after all. Understanding their fuel use, energy conversion, component efficiency and performance limits is fundamental before meaningful environmental improvements can be discussed.
From Aviation Engineering to Sustainable Aviation
For many years, aircraft performance was discussed primarily in terms of thrust, range, fuel consumption, reliability and operating capability. Those metrics still matter, of course. Yet modern engineering increasingly asks another question: what environmental cost accompanies that performance?
This is where the scope of sustainable aviation becomes broader than the popular discussion around alternative fuels. Sustainable aviation also involves more efficient propulsion, better energy management, lower resource consumption, improved environmental assessment methods and a deeper understanding of how aircraft systems behave under real operating conditions.
Şöhret’s research sits directly within this intersection. His work on aircraft-engine performance, exergy, emissions and thermo-environmental evaluation provides engineering tools for examining not simply whether an engine performs well, but how efficiently it converts available energy and how that performance relates to environmental impact.
Aircraft Propulsion and Thermodynamics
Propulsion is one of the most technically demanding areas of aviation. A gas turbine engine must generate sufficient thrust while operating across dramatically different temperatures, pressures, altitudes and flight conditions. Small changes in component behaviour can influence overall fuel use and efficiency.
Thermodynamic analysis helps researchers break this complex system into understandable stages. The compressor, combustion chamber, turbine and nozzle can each be examined individually before their combined effect on engine performance is assessed.
This matters because an engine may appear efficient when judged by one conventional indicator yet reveal significant losses when analysed through energy and exergy methods. In practical terms, exergy analysis looks beyond the quantity of energy and considers how much of that energy can actually perform useful work.
Why Exergy Analysis Matters in Aircraft Engines
Energy cannot simply disappear, but its usefulness can deteriorate. That distinction is one of the reasons exergy analysis is valuable in thermal engineering.
In an aircraft engine, combustion and heat transfer processes create irreversibilities. An exergy-based assessment can help identify where useful energy potential is being destroyed and which components contribute most strongly to those losses.
Şöhret has published research examining exergo-sustainability and ecological performance in gas turbine aero-engines. Such studies are useful because they connect a highly technical engineering measurement with a broader sustainability question: if an engine uses its available energy more effectively, can its environmental performance also be improved?
Energy Efficiency and Environmental Performance
Fuel consumption is one of the most visible links between aircraft-engine efficiency and environmental impact. An inefficient propulsion system generally requires more fuel to deliver the same useful output, which has implications for operating costs, resource use and emissions.
Still, efficiency should not be reduced to fuel burn alone. Researchers can also examine combustion behaviour, exhaust characteristics, component-level losses, exergy destruction and different forms of environmental-performance indexing.
In our view, this is where engineering-based sustainability research becomes particularly valuable. Broad environmental targets are necessary, but engineers also need measurable parameters that show where an actual system can improve. Without that technical layer, sustainability can easily remain an ambition rather than an engineering strategy.
Why Sustainable Aviation Requires a Systems-Level Approach
There is no single switch that turns conventional aviation into sustainable aviation. A lower-impact aviation system depends on many decisions made at different levels.
- Aircraft engines need to convert fuel energy more efficiently.
- Aircraft structures and aerodynamics need to reduce unnecessary energy demand.
- Operational procedures can influence fuel consumption throughout a flight.
- Airports require effective energy, noise and resource-management strategies.
- Alternative fuels need to be assessed beyond their immediate use in the aircraft.
- Environmental performance must be measured with meaningful and comparable indicators.
This broader interpretation also appears in academic books with which Şöhret has been involved. He was among the editors of Springer’s Advances in Sustainable Aviation, published with Tahir Hikmet Karakoç and C. Özgür Colpan. The volume examines sustainable aviation through engineering, environmental, energy and management perspectives rather than presenting it as a narrowly defined technology problem.
Şöhret also appears among the editors of Springer’s Sustainable Aviation, a later academic volume covering subjects that include energy management, sustainable aircraft design, alternative fuels, airport-related environmental issues and sustainability fundamentals.
That multi-disciplinary structure reflects an important reality. An improvement made to one aircraft component is valuable, but sustainability at aviation-system level depends on how technologies, infrastructure and operations interact.
Yasin Şöhret’s Research on Aircraft Engines and Sustainability
Aircraft-engine research forms one of the clearest bridges between Şöhret’s thermodynamic work and his sustainability studies. His published research includes assessments of gas turbine aero-engines, turbojet performance, ecological indicators and environmental characteristics.
These subjects may appear highly specialized at first glance. Yet they address a very practical problem: engineers need reliable ways to determine whether an improvement actually makes a propulsion system more efficient and environmentally preferable.
Measuring More Than Conventional Engine Performance
Traditional engine analysis might focus on parameters such as thrust, pressure ratio, temperatures, fuel flow or specific fuel consumption. Sustainability-focused research expands the assessment by incorporating environmental and thermodynamic indicators.
For example, examining exergy destruction can reveal inefficient processes that a simple energy balance does not fully describe. Environmental indices can then add another layer by relating engine performance to ecological consequences.
This does not mean conventional measurements become obsolete. Quite the opposite: they remain the foundation. The difference is that researchers combine them with additional methods to create a more complete picture.
Thermo-Environmental Evaluation During Flight
A particularly useful direction in aircraft-engine research is the evaluation of performance during actual or representative flight conditions. Engines do not operate at a single fixed point. Altitude, atmospheric conditions, throttle settings and flight phase can all affect performance.
Şöhret, together with co-authors, published a 2025 study examining the green performance limits of a cargo aircraft engine during flight through a thermo-environmental evaluation. The subject illustrates how modern aviation research is moving beyond laboratory-style efficiency calculations toward assessments that consider how propulsion systems behave across changing operating conditions.
For researchers and engineers, this type of analysis can help answer a more useful question than “Is this engine efficient?” The better question is often, “Under which conditions is it most efficient, where does performance deteriorate, and what does that mean environmentally?”
What Does “Green Performance” Actually Mean?
The phrase can sound vague, and admittedly it is sometimes used that way. In engineering research, however, green performance needs measurable foundations.
An aircraft engine may be evaluated through a combination of energy efficiency, exergy efficiency, fuel consumption, emissions, ecological functions and other thermo-environmental indicators. No single metric tells the entire story.
| Evaluation Area | What It Helps Researchers Understand |
|---|---|
| Energy efficiency | How effectively supplied energy is converted into useful output |
| Exergy efficiency | How effectively the useful work potential of energy is preserved |
| Fuel consumption | How much fuel is required for a given level of engine performance |
| Emissions analysis | How engine operation influences atmospheric pollutant output |
| Thermo-environmental indicators | How thermodynamic behaviour and environmental performance interact |
| Flight-condition analysis | How engine performance changes across different operating points |
Viewed together, these methods can give engineers a much richer understanding of propulsion performance. And frankly, that matters. Decisions about sustainable aircraft technologies should ideally be based on measurable improvements rather than attractive terminology.
The Role of Aircraft Propulsion in Lower-Impact Aviation
Aircraft propulsion is only one part of aviation’s environmental footprint, but it is a crucial one. Engines determine how efficiently chemical or other forms of stored energy are transformed into the thrust needed for flight.
Improvements may come from better thermodynamic cycles, advanced materials, improved combustion, alternative fuels, more efficient components or entirely different propulsion architectures. The appropriate solution depends on aircraft type, mission profile, technology maturity and infrastructure.
This is also why there is rarely a universal answer to the question, “What will make aviation sustainable?” Long-haul commercial aircraft, cargo aircraft, regional aircraft and smaller platforms do not necessarily face the same engineering constraints.
Alternative Fuels Are Important, but They Are Not the Whole Story
Discussions about lower-carbon flight frequently centre on sustainable aviation fuels, hydrogen and electrification. All three deserve attention, yet changing the energy carrier alone does not eliminate the need for efficient engineering.
An aircraft using an alternative fuel still benefits from an efficient propulsion system. Hydrogen introduces its own storage, infrastructure and aircraft-design challenges. Battery-electric concepts face energy-density limitations that become increasingly important as aircraft size and range increase.
A systems approach therefore asks several questions at once: Where does the energy originate? How is it stored? How efficiently is it converted? What infrastructure is required? What emissions occur during operation and elsewhere in the lifecycle?
This broader way of thinking closely matches the energy-and-environment perspective seen across Şöhret’s stated research interests.
Life-Cycle Thinking in Aviation Engineering
One of the easiest mistakes in sustainability discussions is focusing only on what happens during operation. Aircraft clearly generate environmental impacts while flying, but a complete assessment can extend much further.
Materials need to be produced. Fuels or electricity must be generated and transported. Aircraft and engines require manufacturing and maintenance. Infrastructure also consumes energy and resources.
Life-cycle thinking does not mean every aviation study must investigate every stage in equal detail. Rather, it encourages researchers to avoid shifting an environmental burden from one stage of a system to another without noticing it.
That perspective is especially important when comparing new technologies with established ones. A solution that produces fewer direct emissions may still involve significant upstream energy requirements. Context matters.
Academic Contributions to Sustainable Aviation
Şöhret’s academic contributions are not limited to one narrow research topic. His publication record includes work related to gas turbine engines, combustion, fuels, energy and exergy analysis, emissions and environmental-performance assessment.
His role as an editor of academic books on sustainable aviation is also notable because such publications bring together researchers working across multiple parts of the aviation system. The objective is not merely to describe environmental challenges but to examine possible engineering and operational responses.
For students and researchers, this interdisciplinary body of work can be useful precisely because aviation sustainability requires fluency in more than one field. Thermodynamics matters. Propulsion matters. Environmental science matters too. In many real engineering problems, they overlap.
Why Research-Based Sustainability Metrics Matter
The aviation sector is surrounded by increasingly ambitious environmental language. Terms such as green aviation, cleaner flight and sustainable aircraft appear frequently in industry communication, policymaking and technology development.
But engineers still need a way to distinguish between a promising concept and a measurable improvement.
Research-based metrics help make that distinction. They allow different engine configurations, flight conditions or technologies to be compared using clearly defined criteria. They can also expose trade-offs: one change might improve fuel efficiency while affecting another performance parameter in an undesirable way.
There is rarely a perfect solution. Good engineering is often about understanding those trade-offs well enough to make better decisions.
The Future of Aviation Through Energy and Environmental Research
The next generation of aviation technologies will probably develop through several parallel pathways rather than one dramatic breakthrough. More efficient conventional and hybrid propulsion, alternative fuels, new aircraft architectures, electrification in suitable applications and better operational practices may all have roles to play.
Whatever technologies emerge, thermodynamic efficiency will remain fundamental. Energy still needs to be converted, stored or transferred, and every conversion process introduces limitations.
Environmental evaluation will also need to become increasingly detailed. Researchers must be able to identify not only whether a technology reduces one form of impact, but whether it improves performance across the broader system.
That is where academic work connecting propulsion, energy and environmental indicators can make a practical contribution. Instead of treating sustainability as a slogan, it turns the subject into something engineers can measure, compare and improve.
A Scientific Perspective on the Future of Flight
Prof. Dr. Yasin Şöhret’s work demonstrates how closely the future of aviation is connected to fundamental engineering questions. Aircraft propulsion, thermodynamics, energy efficiency and environmental performance are not separate conversations; each influences how realistically aviation can reduce its environmental burden.
His research also highlights the importance of measurable performance. Sustainable technologies need good intentions, certainly, but they also need data, analytical methods and transparent engineering criteria.
Readers interested in his current research areas, academic publications and work on aviation, energy and environmental performance can explore the official academic profile of Prof. Dr. Yasin Şöhret.
Frequently Asked Questions
Who is Prof. Dr. Yasin Şöhret?
Prof. Dr. Yasin Şöhret is a Turkish engineer, scientist, academic and author whose research covers aircraft propulsion, thermodynamics, energy analysis and environmental performance, with a particular focus on aviation sustainability.
What are Yasin Şöhret’s main research areas?
His principal research areas include sustainable aviation, aircraft propulsion, gas turbine engines, thermodynamics, energy and exergy analysis, emissions and environmental-performance evaluation.
How is Yasin Şöhret connected to sustainable aviation research?
His research examines technical areas that directly influence aviation sustainability, especially propulsion efficiency, energy use and environmental performance. He has also served as an editor of academic books devoted to sustainable aviation.
What is sustainable aviation?
Sustainable aviation is an approach to reducing the environmental and resource impacts associated with air transport while maintaining safe and effective aviation systems. It can involve aircraft efficiency, propulsion technology, fuels, airport operations, energy management and lifecycle assessment.
Why is aircraft propulsion important for sustainability?
Propulsion systems convert stored energy into the thrust required for flight. Their efficiency strongly influences fuel use, operating performance and emissions, making propulsion research an important part of efforts to reduce aviation’s environmental impact.
What is exergy analysis in aircraft engines?
Exergy analysis evaluates the useful work potential of energy and identifies where that potential is lost because of irreversible processes. In aircraft engines, it can help engineers locate component-level inefficiencies that conventional energy balances may not fully reveal.
What is the difference between energy efficiency and exergy efficiency?
Energy efficiency compares energy input and useful output, while exergy efficiency also considers the quality and useful work potential of that energy. Exergy analysis can therefore offer a deeper view of where thermodynamic performance is being lost.
Can more efficient aircraft engines reduce environmental impact?
Greater engine efficiency can reduce the amount of fuel needed to provide a given level of useful performance. Depending on the engine, operating conditions and fuel involved, this can contribute to lower resource consumption and improved emissions performance.
Are sustainable aviation fuels enough to make aviation sustainable?
No single fuel can address every part of aviation sustainability. Alternative fuels may reduce particular environmental impacts, but propulsion efficiency, aircraft design, infrastructure, lifecycle effects and operational performance also need to be considered.
Why are gas turbine engines studied using thermodynamics?
Gas turbine engines operate through compression, combustion, expansion and exhaust processes that are fundamentally thermodynamic. Analysing temperature, pressure, energy transfer and irreversibility helps engineers understand their performance and identify potential improvements.
What does thermo-environmental evaluation mean?
Thermo-environmental evaluation combines thermodynamic performance with environmental indicators. Instead of looking only at engine output or fuel consumption, researchers can assess how efficiency, energy losses and environmental effects interact.
Why does sustainable aviation require a systems approach?
Aviation consists of interconnected technologies and operations. Changes to propulsion, fuel, aircraft design, airport energy use or operating procedures can affect other parts of the system, so sustainable solutions need to consider those interactions rather than optimizing one factor in isolation.
