Prof. Dr. Yasin Şöhret: Advancing Sustainable Aviation Research

Explore Prof. Dr. Yasin Şöhret’s research on aviation, sustainable technologies, aircraft propulsion, energy efficiency and environmental performance.

These questions sit at the center of Prof. Dr. Yasin Şöhret’s academic work. A Turkish engineer, scientist, academic and author, Şöhret works across aircraft propulsion, thermodynamics, energy and environmental performance, bringing disciplines that are often discussed separately into the same engineering conversation. His current academic position as a professor at Süleyman Demirel University is confirmed by the university’s official staff records.

What makes this perspective particularly relevant is its systems-level character. Improving one component in isolation is rarely enough in modern flight systems. Engine efficiency, fuel use, emissions, thermodynamic losses and operational choices interact with one another, so meaningful progress requires seeing the aircraft as part of a much larger energy and environmental system.

Who Is Prof. Dr. Yasin Şöhret?

Prof. Dr. Yasin Şöhret is an academic whose research focuses heavily on the engineering challenges surrounding modern aircraft and their propulsion systems. His professional profile describes his work through three closely connected areas: sustainable aviation, propulsion and thermodynamics, and energy and environment.

Rather than treating sustainability as a general environmental slogan, his work approaches it through measurable engineering parameters. Aircraft-engine energy use, exergy, emissions, thermodynamic performance and resource efficiency are all parts of that picture. This distinction matters. Sustainability in engineering ultimately has to be evaluated through numbers, operating conditions and physical limits, not just intentions.

His academic background also reflects this technical foundation. Springer profiles associated with his editorial work state that Şöhret graduated from the Mechanical Engineering Department of Eskişehir Osmangazi University and completed his doctorate in aircraft maintenance at Anadolu University. His stated research interests include gas turbine engine measurements, combustion and fuels, together with energy and exergy analysis of thermal systems.

That combination places his research at an interesting junction. It connects conventional aircraft engineering with a much newer question facing the sector: how can aviation maintain technical performance while becoming more efficient and environmentally responsible?

Research at the Intersection of Aviation, Energy and Environment

Aircraft are highly integrated engineering systems. A change in combustion conditions may influence fuel consumption and emissions. A change in engine efficiency affects energy demand. Improvements in propulsion may alter environmental performance over an entire flight profile.

For that reason, research that connects these variables can offer a more useful picture than looking at a single performance indicator. Şöhret’s work frequently follows precisely this approach, examining how thermodynamic performance and environmental outcomes can be assessed together.

Aircraft Propulsion and Thermodynamics

Propulsion is one of the defining technical areas of aircraft performance. Gas turbine aero-engines convert the chemical energy stored in fuel into useful propulsion, but that conversion is never perfect. Some of the available energy inevitably becomes unavailable for useful work through combustion irreversibilities, heat transfer, pressure losses and other processes.

Thermodynamic analysis helps engineers understand where those losses occur. First-law analysis can describe energy balances, while second-law methods can go further by examining the quality of energy and the irreversibilities inside the system.

Şöhret has published research specifically on the thermodynamic modelling of gas turbine aero-engines. One of his studies presented a methodology in which engine components are evaluated separately using the first and second laws of thermodynamics, creating a basis applicable to turbojet, turboprop and turbofan configurations.

For readers outside engineering, this may sound highly technical. In practical terms, though, the question is surprisingly straightforward: where is useful performance being lost, and what does that loss tell us about the engine?

Why Exergy Analysis Adds Another Layer

Energy cannot simply disappear, but not all energy has the same ability to perform useful work. Exergy analysis deals with this difference. It helps identify the useful work potential of an energy flow and, crucially, where that potential is destroyed by irreversible processes.

In aircraft-engine research, this can reveal something a basic fuel-consumption figure cannot. Two systems might consume similar amounts of energy while using that energy with different levels of thermodynamic effectiveness.

Şöhret’s research on a simple gas turbine aero-engine applied exergy and exergo-sustainability analysis to evaluate performance and ecological characteristics. The work demonstrates how conventional thermodynamic assessment can be extended toward sustainability-oriented indicators.

This is where aviation engineering and environmental analysis begin to overlap in a meaningful way.

Why Sustainable Aviation Has Become a Major Research Field

sustainable aviation is broader than simply replacing one fuel with another or making a single aircraft component more efficient. It involves aircraft design, propulsion, energy management, alternative fuels, airport operations, noise, resource use and environmental impact.

That breadth is one reason the subject demands multidisciplinary research. A technically efficient engine is valuable, but it is only one piece of the puzzle. The fuel supplying that engine matters. So does the aircraft’s operating profile, the infrastructure supporting it and the way environmental performance is measured.

The Springer volume Sustainable Aviation, co-edited by Yasin Şöhret, Tahir Hikmet Karakoc, C. Ozgur Colpan and Onder Altuntas, illustrates this wider perspective. Published in 2019, it covers sustainable aviation methodology together with areas such as airport energy management, aircraft noise, biodiversity, sustainable aircraft design and alternative fuels.

An earlier Springer volume, Advances in Sustainable Aviation, was co-edited by Şöhret, Karakoç and Colpan. It approaches sustainability at a systems level and discusses engineering, environmental, management and economic dimensions of the sector.

In our view, this systems-level perspective is particularly important. Aviation does not become more sustainable because one isolated metric improves. Progress is more convincing when energy efficiency, operational performance and environmental consequences can be assessed together.

Measuring the Environmental Performance of Aircraft Engines

Engine performance has traditionally been discussed through parameters such as thrust, fuel consumption, pressure ratio and thermal efficiency. Those measures remain essential. Today, however, the environmental consequences associated with engine operation have become equally difficult to ignore.

This changes the questions researchers ask. Instead of only wondering whether an engine performs well, they may also examine how efficiently resources are used, where thermodynamic losses occur and how operating conditions influence environmental indicators.

From Fuel Consumption to Emissions

Fuel consumption and emissions are related, but they are not interchangeable concepts. Combustion conditions, fuel properties, engine architecture and operating regimes all influence the environmental characteristics of an aero-engine.

This is why a useful assessment needs context. An aircraft behaves differently during take-off, climb, cruise and descent. Engine load changes, temperatures change and fuel flow changes. Environmental performance can therefore vary considerably throughout a flight.

A 2025 publication listed on Şöhret’s official research profile examines the green performance limits of a cargo aircraft engine during flight through a thermo-environmental evaluation. The subject itself reflects an important shift in current engineering research: environmental performance is increasingly being investigated alongside conventional thermodynamic behaviour rather than as an entirely separate topic.

Why Engine-Level Analysis Still Matters

It is tempting to discuss the environmental future of flight only through large-scale solutions. Hydrogen aircraft, synthetic fuels, electrification and radical airframe concepts understandably attract attention. Yet improvements inside existing propulsion systems remain relevant too.

Small gains in efficiency can matter when they are repeated across many flights and operating hours. Identifying where energy quality is lost may also help researchers understand which components offer realistic improvement potential and which losses are constrained by physical limits.

There is another advantage: measurable engineering indicators allow sustainability claims to be tested. That is healthier for the sector than relying on broad “green” terminology that may mean very different things in different contexts.

Connecting Aviation Engineering with Sustainability

Modern aviation research increasingly brings propulsion, thermodynamics, fuel use, emissions and environmental performance into the same analytical framework. Şöhret’s academic profile is a good example of how these subjects can intersect rather than exist as separate research silos.

Consider a gas turbine engine. Combustion affects temperature and pressure. These affect thermodynamic efficiency. Efficiency influences fuel demand. Fuel demand is connected to emissions and resource consumption. At the same time, engine operation changes throughout the flight, so the environmental picture is dynamic rather than fixed.

Once these relationships are viewed together, the value of interdisciplinary analysis becomes clearer.

It also changes what we mean by “better performance.” Better may still mean higher efficiency or improved propulsion characteristics, but it can additionally mean using resources more effectively, reducing avoidable losses and understanding environmental trade-offs before choosing a technical solution.

Academic Contributions to Sustainable Aviation

One way to understand a researcher’s field is to look not only at individual papers but also at the larger academic themes in which that researcher participates. In Şöhret’s case, both his publications and his editorial work repeatedly return to the relationship between aircraft technology, energy and sustainability.

His involvement as an editor of Sustainable Aviation and Advances in Sustainable Aviation is relevant here because both books treat the subject as something larger than an aircraft-engine problem alone. They discuss technology alongside energy management, environmental impact, fuels and wider operational considerations.

At the same time, his own technical studies remain grounded in engineering analysis. Research on gas turbine aero-engines, exergo-sustainability and thermodynamic modelling provides a quantitative foundation beneath the broader sustainability discussion.

That balance is valuable. High-level sustainability objectives can show where aviation wants to go; detailed engineering research helps determine what is physically and technically achievable.

What Does a Systems-Level Approach Change?

A systems-level perspective asks researchers to look beyond a single component or metric. This does not mean every study needs to analyse an entire global transport network. Rather, it means recognising that engineering decisions produce consequences elsewhere in the system.

Imagine improving one engine parameter while increasing another form of loss. On paper, the first metric looks better. In practice, the overall result may be less impressive. The same issue arises when a technology reduces direct operational emissions but introduces new energy or resource demands elsewhere in its lifecycle.

Şöhret’s official research profile explicitly frames his work around a systems-level approach to aviation challenges through energy, environment and sustainability. It also identifies resource efficiency and lifecycle thinking as elements within his energy and environment research.

For engineers, this broader lens encourages more complete performance assessment. For decision-makers, it can make technical comparisons more meaningful. And for students entering the field, frankly, it is a useful reminder that aircraft engineering is becoming increasingly interdisciplinary.

The Role of Alternative Fuels and New Propulsion Technologies

Alternative fuels are frequently presented as a major pathway toward lower-impact flight. Sustainable aviation fuel, hydrogen and other emerging energy carriers may all influence the future technology mix, although each pathway brings its own engineering, infrastructure and lifecycle questions.

This is exactly why propulsion cannot be separated from fuel science. Different fuels may affect combustion characteristics, storage requirements, aircraft architecture and operational procedures. Their environmental value also depends on more than what happens inside the engine.

The Sustainable Aviation volume co-edited by Şöhret includes alternative fuels among its core subject areas, while his academic research interests have long included combustion and fuels.

No single fuel or propulsion technology should be treated as a universal answer without considering the wider system. The better question is often: under which operating and lifecycle conditions does a particular technology deliver a genuine improvement?

Energy Efficiency Is Still Central to Greener Flight

New technologies naturally receive attention, but basic energy efficiency remains one of the most persistent themes in sustainable engineering. If an aircraft can perform the required mission while wasting less useful energy, that improvement has technical and potentially environmental value.

Efficiency can be examined at several levels. Engineers may evaluate individual engine components, the complete propulsion system, aircraft operations or even airport energy management. Each scale reveals different opportunities and constraints.

Şöhret’s work is particularly associated with the thermodynamic side of this question. By studying energy and exergy behaviour in aero-engines, researchers can identify both how much energy moves through a system and how effectively its useful potential is exploited.

That distinction is easy to overlook, yet it can tell us much more than a simple input-versus-output comparison.

What Can Aviation Professionals Learn from This Research Direction?

Not every aviation professional needs to perform an exergy calculation. Still, the principles behind this research have wider relevance for engineers, students, operators and people involved in sustainability strategy.

• Environmental performance should be supported by measurable indicators rather than broad claims.
• Fuel consumption, efficiency and emissions should be interpreted in the context of operating conditions.
• Aircraft propulsion and sustainability are closely connected technical subjects.
• Energy losses can reveal where engineering improvements may have the greatest value.
• Alternative technologies should be evaluated at a system level rather than through a single attractive metric.
• Lifecycle and resource-efficiency considerations can change how a supposedly “green” solution is assessed.

Perhaps the most useful lesson is that sustainability becomes more practical when it is translated into engineering questions. Once a goal can be measured, modelled and compared, researchers can begin testing whether a proposed improvement actually delivers what it promises.

The Future of Aviation Requires More Than One Solution

The next generation of aircraft will probably not emerge from a single breakthrough. More efficient propulsion, improved aerodynamics, new fuels, smarter operations, better energy management and more rigorous environmental assessment are all likely to play roles of different sizes.

That makes interdisciplinary research increasingly important. An engineer working on combustion may need to understand environmental consequences. A sustainability specialist may need to appreciate thermodynamic limitations. Designers may have to consider lifecycle implications much earlier in development.

Şöhret’s work sits directly within this overlap. His research connects aircraft propulsion and thermodynamic performance with energy efficiency, emissions and environmental assessment, while his editorial contributions place those technical questions inside the broader development of sustainable flight.

For researchers, aviation professionals and students trying to understand where aircraft engineering meets sustainability, this intersection is worth following closely. The greener future of flight will depend not simply on ambitious targets, but on careful measurement, technically realistic choices and a clearer understanding of how energy moves through the systems that keep aircraft in the sky.

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 and environmental performance. He currently appears as a professor in Süleyman Demirel University’s official academic records.

What are Yasin Şöhret’s main research areas?

His official research profile groups his work under sustainable aviation, propulsion and thermodynamics, and energy and environment. Specific subjects include aircraft-engine energy analysis, exergy, emissions, performance limits, resource efficiency and lifecycle-oriented engineering assessment.

What is sustainable aviation?

Sustainable aviation is an interdisciplinary approach to reducing the environmental and resource impacts associated with flight while maintaining safe and effective air transport. It can involve propulsion efficiency, alternative fuels, aircraft design, airport energy management, operational improvements and environmental assessment.

How does aircraft propulsion affect aviation sustainability?

Propulsion systems consume fuel and convert its energy into thrust, making them central to aircraft energy use and emissions. Improvements in combustion, thermodynamic efficiency and engine operation can therefore influence both technical and environmental performance.

What is exergy analysis in aircraft engines?

Exergy analysis evaluates the useful work potential of energy and identifies where that potential is destroyed through irreversible processes. Applied to aircraft engines, it can help researchers locate thermodynamic inefficiencies that are not fully visible through conventional energy balances alone.

What is the difference between energy and exergy analysis?

Energy analysis tracks quantities of energy according to the first law of thermodynamics. Exergy analysis also considers energy quality and the potential to perform useful work, allowing engineers to identify and quantify irreversibilities within a system.

Why are gas turbine engines important in aviation research?

Gas turbines power a large portion of modern commercial and military aircraft. Because their performance depends on complex thermodynamic and combustion processes, they remain a major research area for improving fuel efficiency, propulsion performance and environmental outcomes.

Has Yasin Şöhret published research on gas turbine aero-engines?

Yes. His published work includes thermodynamic modelling of gas turbine aero-engines as well as exergo-sustainability and ecological analysis of a simple gas turbine aero-engine. These studies use thermodynamic methods to investigate engine performance and sustainability-related indicators.

Has Yasin Şöhret worked on sustainable aviation books?

Yes. He is listed by Springer as a co-editor of Sustainable Aviation, published in 2019, and Advances in Sustainable Aviation, published as an eBook in 2017. Both volumes examine sustainability in aviation through multiple engineering and environmental perspectives.

What role do alternative fuels play in sustainable aviation?

Alternative fuels may help reduce particular environmental impacts, but their value depends on production methods, lifecycle emissions, infrastructure, aircraft compatibility and operational requirements. This is why they are normally assessed as part of a broader aviation system rather than as an isolated solution.

Can more efficient aircraft engines reduce environmental impact?

Greater engine efficiency can reduce the amount of fuel required for a given operating objective, which can contribute to lower resource use and certain emissions. The actual environmental benefit depends on the engine, fuel, flight conditions and the wider lifecycle of the technology.

Why is a systems-level approach important in aviation?

Aircraft technologies are interconnected. A change that improves one performance metric can influence fuel demand, emissions, weight, operating requirements or other parts of the system. Systems-level analysis helps engineers evaluate these trade-offs rather than judging technologies through a single number.

How are thermodynamics and sustainable aviation connected?

Thermodynamics explains how energy is converted, transferred and degraded inside propulsion and other engineering systems. Because sustainability depends partly on using energy and resources efficiently, thermodynamic analysis provides a technical foundation for understanding where meaningful improvements may be possible.