CEAS Aeronautical Journal
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Review of flight simulation fidelity requirements to help reduce ‘rotorcraft loss of control in-flight’ accident rates
CEAS Aeronautical Journal - Tập 12 - Trang 701-721 - 2021
This paper examines the fidelity requirements for flight simulators to improve training and address the problems associated with rotorcraft loss of control in-flight (LOC-I). To set the context, trends in rotorcraft accident statistics are presented. The data show that, despite recent safety initiatives, LOC-I rotorcraft accidents have been identified as a significant and growing contribution to a......
Influence of engine modeling on structural sizing and approach aerodynamics of a circulation controlled wing
CEAS Aeronautical Journal - Tập 9 - Trang 219-233 - 2018
Extended configurations of a short take-off and landing aircraft under investigation at the Coordinated Research Centre SFB 880 include a morphing droop nose and a tractor propeller engine. The short take-off and landing capabilities are achieved by circulation control via a high velocity jet over the flap leading edges utilizing the Coandǎ effect. The effect of the engine integration in combinati......
Two-stage leak detection in vacuum bags for the production of fibre-reinforced composite components
CEAS Aeronautical Journal - Tập 10 - Trang 885-892 - 2019
The increasing application of fibre-reinforced composite components in aviation results in new problems in production when compared to the conventional production of components from aluminium alloys. For instance, the existence of leakages in the vacuum bag can substantially impact the component quality. A significant increase of both time and cost, and even the rejection of the entire component a......
Modeling of aircraft fuel consumption using machine learning algorithms
CEAS Aeronautical Journal - Tập 11 - Trang 277-287 - 2019
With the aid of recording systems such as the flight data recorder, information from aircraft sensors can be transmitted in-situ to airlines or maintenance providers during the flight in form of reports, or stored for subsequent analysis in the postprocessing. This allows the determination of current aircraft performance with regard to fuel consumption or emissions. At present, data in a highly ag......
Energy optimal 3D flight path planning for unmanned aerial vehicle in urban environmentsAbstract This paper presents a general approach to compute energy optimal flight paths for unmanned aerial vehicle (UAV) in urban environments. To minimize the energy required, the flight path is optimized by exploiting local wind phenomena, i.e., upwind and tailwind areas from the airflow around buildings. A realistic wind field of a model urban environment typical... ...
CEAS Aeronautical Journal - - 2023
Experimental investigation of UAV rotor aeroacoustics and aerodynamics with computational cross-validation
CEAS Aeronautical Journal - - Trang 1-16 - 2023
The study provided a base of comparison of known computational techniques with different fidelity levels for performance and noise prediction of a single, fixed-pitch UAV rotor operating with varying flight parameters. The range of aerodynamic tools included blade element theory, potential flow methods (UPM, RAMSYS), lifting-line method (PUMA) and Navier–Stokes solver (FLOWer). Obtained loading di......
Numerical and experimental study of aerosol dispersion in the Do728 aircraft cabin
CEAS Aeronautical Journal - Tập 14 - Trang 509-526 - 2023
The dispersion of aerosols originating from one source, the ‘index’ passenger, within the cabin of the aircraft Do728 is studied experimentally using an aerosol-exhaling thermal manikin and in Reynolds-averaged Navier–Stokes simulations (RANS). The overall aim of the present study is the experimental determination of the aerosol spreading for the state-of-the-art mixing ventilation (MV) and to eva......
Sensor fusion and flight path reconstruction of the ACT/FHS rotorcraft
CEAS Aeronautical Journal - Tập 6 - Trang 529-539 - 2015
DLR’s active control technology/flying helicopter simulator (ACT/FHS) research rotorcraft supports research in a variety of fields. This paper presents the flight path reconstruction (FPR) of the ACT/FHS for post-flight data processing and its online sensor fusion during flight. Both are fundamental for system identification and flight control research. First, the ACT/FHS rotorcraft, its system ar......
Assessment of hydrogen transport aircraft
CEAS Aeronautical Journal - Tập 13 - Trang 813-845 - 2022
Zero-carbon-dioxide-emitting hydrogen-powered aircraft have, in recent decades, come back on the stage as promising protagonists in the fight against global warming. The main cause for the reduced performance of liquid hydrogen aircraft lays in the fuel storage, which demands the use of voluminous and heavy tanks. Literature on the topic shows that the optimal fuel storage solution depends on the ......
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