Performance of a Turboshaft Engine for Helicopter Applications Operating at Variable Shaft Speed

@inproceedings{Mist2012PerformanceOA,
  title={Performance of a Turboshaft Engine for Helicopter Applications Operating at Variable Shaft Speed},
  author={Gianluigi Alberto Mist{\'e} and Ernesto Benini},
  year={2012}
}
An off-design steady state model of a generic turboshaft engine has been implemented to assess the influence of variable free power turbine (FPT) rotational speed on overall engine performance, with particular emphasis on helicopter applications. To this purpose, three off-design flight conditions were simulated and engine performance obtained with different FTP rotational speeds were compared. In this way, the impact on engine performance of a particular speed requested from the main… Expand
A New Methodology for Determining the Optimal Rotational Speed of a Variable RPM Main Rotor/Turboshaft Engine System
Variable speed rotors represent an innovative field of research for the development of new rotorcraft designs. The problems related to employing a main rotor variable speed are numerous and requireExpand
TURBOSHAFT ENGINE PERFORMANCE COMPARISON BETWEEN CV T AND FIXED RATIO TRANSMISSION FOR A VARIABLE SPEED R
Variable speed rotor studies represent a promising research field for rotorcraft performance improvement and fuel consumption reduction. The problems related to employing a main rotor variable speedExpand
Variable-Speed Rotor Helicopters: Performance Comparison Between Continuously Variable and Fixed-Ratio Transmissions
Variable-speed rotor studies represent a promising research field for rotorcraft performance improvement and fuel-consumption reduction. The problems related to employing a main rotor variable speedExpand
VARIABLE SPEED POWER TURBINE PRELIMINARY DESIGN OPTIMIZATION FOR ROTORCRAFT APPLICATIONS
Variable speed rotor studies represent a promising research field for rotorcraft performance improvement and fuel consumption reduction. The turboshaft engines employed to drive helicopter rotorsExpand
Optimal Control of a Compound Rotorcraft for Engine Performance Enhancement
TLDR
This work aims to investigate the impact of optimal control strategies for a generic coaxial compound rotorcraft, equipped with turboshaft engines, targeting the minimization of mission fuel burn and gaseous emissions. Expand
Optimal Control of a Compound Rotorcraft for Engine Performance Enhancement
Demands for rotorcraft with increased flight speed, improved operational performance and reduced environmental impact have led to a drive in research and development of alternative concepts.Expand
Computational Finite Element Analysis of Adaptive Gas Turbine Stator-Rotor Flow Interactions for Future Vertical Lift Propulsion
TLDR
The results show that it is possible to increase efficiency increases of up to 10% by articulating rotor blades at off-design conditions thereby providing critical leap ahead design capabilities for the US Army Future Vertical Lift (FVL) program. Expand
The LQG/LTR control method for turboshaft engine with variable rotor speed based on torsional vibration suppression
In order to realize the rapid response control for turboshaft engine during the process of variable rotor speed, the linear quadratic Gaussian with loop transfer recovery (LQG/LTR) control method forExpand
Research on Integrated Control Method of Tiltrotor with Variable Rotor Speed Based on Two-Speed Gearbox
Abstract The process of rotor speed variation under tiltrotor cruise state has been studied, and the integrated variable speed control method of tiltrotor based on two-speed gearbox is proposed.Expand
Thermal characteristics of helicopters based on integrated fuselage structure/engine model
Abstract Although the temperature distributions and infrared characteristics on the helicopter fuselage and in the exhaust plume have been great investigated in previous literatures, most of them areExpand
...
1
2
3
...

References

SHOWING 1-10 OF 22 REFERENCES
Preliminary Study on a Wide-Speed-Range Helicopter Rotor/Turboshaft System
this paper, a preliminary performance assessment of the coupling between a wide-speed-range helicopter rotor and the connected turboshaft engine was carried out. For this purpose, a well-known testExpand
Wide speed range turboshaft study
NASA-Lewis and NASA-Ames have sponsored a series of studies over the last few years to identify key high speed rotorcraft propulsion and airframe technologies. NASA concluded from these studies thatExpand
Power turbine speed control of the GE T700 engine using the zero steady-state self-tuning regulator
This paper presents a new approach to the speed control of the T700 turboshaft engine using an adaptive controller of the self-tuning type for the power turbine. For the design of the SISO-STR, aExpand
Researches on Modeling and Simulation of Turbo-Shaft Engine and Main Rotor System
TLDR
Integrative model of turboshaft engine and main rotor on helicopter power system is realized and an inner-outer series-wound control loop to adjust engine output power based on feedback control is developed. Expand
A Sequential Shifting Algorithm for Variable Rotor Speed Control
A proof of concept of a continuously variable rotor speed control methodology for rotorcraft is described. Variable rotor speed is desirable for several reasons including improved maneuverability,Expand
A simplified dynamic model of the T700 turboshaft engine
Abstract : A simplified open-loop dynamic model of the T700 turboshaft engine, valid within the normal operating range of the engine, is developed. This model is obtained by linking linear stateExpand
A New Compressor Map Scaling Procedure for Preliminary Conceptional Design of Gas Turbines
In the preliminary conceptional design phase of any new gas turbine project the design and off-design performance of many alternative configurations and cycles must be studied. The simulation resultsExpand
How to Get Component Maps for Aircraft Gas Turbine Performance Calculations
TLDR
The extrapolation of compressor maps toward very low speed, as required for the calculation of starting, idle and windmilling performance calculations, is discussed in some detail. Expand
Gas turbine theory
1. Introduction 2. Shaft power cycles 3. Gas turbine cycles for aircraft propulsion 4. Centrifugal compressors 5. Axial flow compressors 6. Combustion systems 7 Axial and radial flow turbines 8.Expand
Improvements in Off Design Aeroengine Performance Prediction Using Analytic Compressor Map Interpolation
Abstract Compressor map interpolation is usually performed through the introduction of auxiliary coordinates (β). In this paper, a new analytical bivariate β function definition to be used inExpand
...
1
2
3
...