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SFB 1029 (TurbIn), D01


Holistic evaluation and improvement of a gas turbine with periodic pressure-gain combustion

Energy conversion efficiencies of approximately 40% can be achieved in today’s gas turbines by the utilization of various design methods and materials. However, the main part of the primary energy used is still lost in form of heat, thereby producing greenhouse gases. It is common knowledge that after significant improvements in the past only marginal steps can be expected in the future for the classical design of these machines. Hence, only radical changes offer new opportunities. It is the vision of this Collaborative Research Center 1029 “TurbIn - Substantial efficiency increase in gas turbines through direct use of coupled unsteady combustion and flow dynamics” to increase the efficiency of a gas turbine by more than 10% by the exploitation and control of a combination of innovative combustion concepts and unsteady characteristics.

The major contribution to an efficiency increase is expected from a thermodynamically motivated move from a constant-pressure to a constant-volume combustion. This will be done with the more classical pulsed detonation as well as with a new shockless explosion concept. A pulsed combustion, however, will give rise to severe consequences with respect to a stable operation of the compressor or a reliable cooling of the first stages of a turbine, to name just a few challenges. To control these implications flow control methods either passive or in closed loop will be applied. These flow control methods will be built up in such a fashion that they offer an additional increase in efficiency which can even be used in a classical gas turbine as well.

The project “Holistic evaluation and improvement of a gas turbine with periodic pressure-gain combustion” focuses on the thermodynamic evaluation of gas turbine processes that implement pulsating constant-volume combustion. The gas turbine simulation tool GTlab is extend in the scope of the project, which will allow for the full consideration of the non - stationary gas dynamic phenomena, typical for the cycle in question. The affected turbo components as well as the secondary air system are covered at preliminary design level. Thus, the concept of periodic pressure-gain combustion is evaluated in the holistic context of a gas turbine.

Collaborative Research Centre 1029 „TurbIn“

Ansprechpartner: M.Sc. Nicolai Neumann

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Pulsed Impingement Turbine Cooling and its Effect on the Efficiency of Gas Turbines with Pressure Gain Combustion

N. Neumann, A. Berthold, F. Haucke, D. Peitsch, P. Stathopoulos
(TU Berlin)

Journal of Turbomachinery, Vol. 143, TURBO-20-1344
April 2021, DOI: 10.1115/1.4050361

Also published as GT2020-15344, ASME Turbo Expo 2020,
DOI: 10.1115/GT2020-15344

Introduction and Validation of a Mean Line Solver for Present and Future Turbomachines

N. Neumann, D. Peitsch
(TU Berlin)

24th ISABE Conference, International Symposium on Air Breathing Engines,
Canberra, Australia, Sep 23-27 2019, ISABE-2019-24441

A Comparison of Steady-State Models for Pressure Gain Combustion in Gas Turbine Performance Simulation

N. Neumann, D. Woelki, D. Peitsch
(TU Berlin)

Proceedings of Global Power and Propulsion Society Conference Beijing 2019,
Beijing, China, Sep 16-18 2019, GPPS-BJ-2019-198

Potentials for Pressure Gain Combustion in Advanced Gas Turbine Cycles

N. Neumann, D. Peitsch
(TU Berlin)

Journal of Applied Sciences, Energy, Section Energy
MDPI, Volume 9, Issue 16, August 2019, 3211

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