Regeneration and Intercooling in Gas Turbine Engines for Propulsion Systems

Int. J. Turbo Jet-Engines

Ghezzi²,

Ingenito³

et al. 2012

Self Cite

The introduction of intercooling and regeneration in a gas turbine engine can lead to performance improvement and fuel consumption reduction. Moreover, as first consequence of the saved fuel, also the pollutant emission can be greatly reduced. Turboprop seems to be the most suitable gas turbine engine to be equipped with intercooler and heat recuperator thanks to the relatively small mass flow rate and the small propulsion power fraction due to the exhaust nozzle. However, the extra weight and drag due to the heat exchangers must be carefully considered. An intercooled-recuperated turboprop engine is studied by means of a thermodynamic numeric code that, computing the thermal cycle, simulates the engine behavior at different operating conditions. The main aero engine performances, as specific power and specific fuel consumption, are then evaluated from the cycle analysis. The saved fuel, the pollution reduction, and the engine weight are then estimated for an example case

Section: Introductionmentioning

confidence: 99%

Fuel Consumption Reduction and Weight Estimate of an Intercooled-Recuperated Turboprop Engine

Int. J. Turbo Jet-Engines

Ghezzi²,

Ingenito³

et al. 2012

Self Cite

“…The parametric study of a turboprop engine with intercooling and regeneration (ICR engine) has been performed by means of a thermodynamic numeric program developed for this purpose. The program allows to simulate the behavior of a ICR turboprop engine at different operating conditions (altitude, flight Mach number) and for different engine characteristics (pressure ratio, TET, intercooling and regeneration effectiveness, components efficiency) computing the thermal cycle and hence the main engine performance and efficiencies [19][20][21][22]. The program simulates the HPT blade cooling, follow ing the method presented by Oates and reported in bib liography [17].…”

Section: Introductionmentioning

confidence: 99%

Performance of a Turboprop Engine with Heat Recovery in Off-Design Conditions

Int. J. Turbo Jet-Engines

Ghezzi

Gamma

et al. 2013

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The research for fuel consumption and pollution reduction in new generation aero engines has indicated intercooling and regeneration as very effective methods for this purpose. Hence, different countries have joined their efforts in common research programs, to develop new gas turbine engines able to reduce considerably the fuel consumption and the ambient impact by means of these two techniques. To study their effects on the engine performance and characteristics, a thermodynamic numerical program that simulates the behavior of a turboprop engine with intercooling and regeneration in different operating conditions has been developed. After the parametric study, and the definition of the design conditions, the off-design analysis is carried on, comparing the main characteristics of the intercooled-regenerated turboprop with those of a conventional engine. Then, once a particular mission profile was fixed, the engine performance, in particular the equivalent power, the fuel consumption and the heat exchanger weight were discussed

“…The simultaneous use of both techniques allows to increase the available power, while the fuel consumption can remain nearly constant. Some studies have been done on the possibility of introducing regeneration and intercooling on gas turbine aero engines, in particular turboprops and high bypass turbofan engines [1][2][3][4][5][6][7][8][9][10][11][12][13] . It seems logical, as consequence, to think to introduce the two practices also in gas turbine engines for UAV propulsion systems.…”

Section: Introductionmentioning

confidence: 99%

Low-Fuel Consumption Gas Turbine Engines for Extended-Range UAVs

52nd Aerospace Sciences Meeting

Ingenito

Gamma

et al. 2014

Self Cite

In the last years the interest in Unmanned AirVehicle systems has greatly raised, thanks to their extended operation capabilities. Among the reasons of this growing interest there is the development of very efficient and reliable guiding systems, that allow a thorough remote vehicle control. The endurance capability is certainly one of the most important UAV characteristics, because some missions are supposed to last even more than one day. For this reason, the engine fuel consumption becomes a fundamental aspect. The turboprop engine is commonly used in this kind of missions, with powers in the range between 300-900 kW. To extend the flight range and the endurance characteristics, it is important to have low-fuel consumption propulsion systems. At this purpose, a turboprop engine with intercooling and regeneration has been studied. A thermodynamic numeric program that simulates the behavior of a turboprop with regeneration and intercooling at different engine and operating conditions has been developed. The program allows to compute the thermodynamic working cycle and hence the main engine performances, as specific power, thermal efficiency and specific fuel consumption. An off-design analysis is performed to evaluate the engine behavior when operating at different conditions respect to the design point. An example case, showing the saved fuel for a particular mission profile, is then reported.