Paul Ziegler

ORCID: 0000-0002-7357-0130
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About
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Research Areas
  • Gas Dynamics and Kinetic Theory
  • Advanced Aircraft Design and Technologies
  • Rocket and propulsion systems research
  • Vehicle emissions and performance
  • Thermodynamic and Exergetic Analyses of Power and Cooling Systems

MTU Aero Engines (Germany)
2022-2025

Besides the goal of net-zero carbon dioxide (CO2) emissions, reduction aviation's climate impact requires mitigation its other forcing effects, most importantly avoidance warming condensation trails (contrails). From current understanding a decrease both, soot and water vapor emissions from aircraft engines yields reduced occurrence persistence contrails contrail cirrus, reducing their radiative forcing. The WaterEnhanced Turbofan (WET) for instance is one concept that achieves both effects...

10.2139/ssrn.5071292 preprint EN 2025-01-01

Abstract The Water-Enhanced Turbofan is a promising aero engine propulsion concept that could reduce the climate impact of aviation significantly by combining conventional Joule/Brayton cycle with Clausius-Rankine steam cycle. One important component high on overall performance condenser, heat exchanger cooling core exhaust for water recovery. design conditions condenser have not been analysed from system perspective in previous studies. Therefore, these operating conditions, which can be...

10.1017/aer.2024.158 article EN The Aeronautical Journal 2025-02-26

A significant part of the current aviation climate impact is caused by non-carbon-dioxide emissions, mainly nitrogen oxides (NOx) and contrails. It is, therefore, important to have a holistic view on metrics. Today’s conventional, but already well-developed, aero-engines are based Joule–Brayton cycle, leave only limited room for improvement in impact. The revolutionary Water-Enhanced Turbofan (WET) concept represents technical step change addressing all relevant emissions implementing Cheng...

10.3390/app122312431 article EN cc-by Applied Sciences 2022-12-05

Abstract The Water-Enhanced Turbofan is a promising revolutionary concept which addresses the most climate-relevant emissions of aviation: carbon dioxide, nitrogen oxides as well water vapor and particulate matter form contrail cirrus. combines traditional Joule/Brayton cycle with Clausius-Rankine steam to dual-fluid also known Cheng cycle. While previous publications cover basic thermodynamics give an overview potential climate impact reduction, this paper aims important design parameters...

10.1115/gt2023-100529 article EN 2023-06-26
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