This is our latest selection of worldwide publications and patents in english on Aeronautics, between many scientific online journals, classified and focused on aeronautic, aerodynamic, avionic, thrust, winglet, empennage, fuselage, flight envelope and Mach number.
The Transition to True North in Air Navigation from the Avionics Perspective
Published on 2025-03-11 by Octavian Thor Pleter, Cristian Emil Constantinescu @MDPI
Abstract: In azimuth sensing, aviation relies on the magnetic compass or magnetic sensors (flux valve, magnetometer) because the azimuth reference is Magnetic North. Maritime navigation completed the transition to True North. In October 2023, ICAO established the True North Advisory Group (True-AG) to consider the possibility of the same transition in aviation, as proposed by the International Association of Institutes of Navigation’s AHRTAG Group. There are significant benefits of this tran[...]
Our summary: Transition to True North in aviation navigation is being considered by ICAO and other organizations due to the benefits of accuracy and stability, but concerns about the major change and sensor resilience need to be addressed.
avionics, azimuth sensing, True North, GNSS
Publication
Numerical Investigation of the Two-Phase Flow Characteristics of an Axisymmetric Bypass Dual-Throat Nozzle
Published on 2025-03-11 by Xuefeng Xia, Zhensheng Sun, Yu Hu, Hongfu Qiang, Yujie Zhu, Yin Zhang @MDPI
Abstract: The bypass dual-throat nozzle is based on the dual-throat nozzle, which is a fluidic thrust vector nozzle suitable for integration into rocket motors in a symmetrical manner. As the effects of gas–solid two-phase flows are essential for solid rocket motors (SRMs), this study employs the RNG k–ε turbulence model and a particle trajectory model to numerically simulate the three-dimensional flow field inside a fixed-geometry axisymmetric bypass dual-throa[...]
Our summary: Study simulates flow characteristics in bypass dual-throat nozzle using numerical methods. Results show impact of particle size on performance and deposition locations. Introduction of particle phase reduces thrust-vectoring angle and thrust coefficient.
Numerical Investigation, Two-Phase Flow, Axisymmetric Bypass Dual-Throat Nozzle, Turbulence Model
Publication
The Aerodynamic Design of a Compliant Morphing Flap for Next-Generation Hybrid Electric Regional Aircraft
Published on 2025-03-11 by Francesco Antonio D�Aniello, Pietro Catalano, Domenico Quagliarella, Mauro Minervino @MDPI
Abstract: The focus of this paper is on some of the activities performed by CIRA under the framework of the HERWINGT project (Hybrid Electric Regional Wing Integration Novel Wing Technologies) supported by the Clean Aviation Joint Undertaking and funded by the European Union. The aim of the project is to design an innovative wing suitable for future hybrid electric regional aircraft (HER) that will contribute to the overall target of reducing fuel burn, CO2, and other GHG emissions by improving aerodynami[...]
Our summary: The paper discusses the aerodynamic design of a compliant morphing flap for next-generation hybrid electric regional aircraft, focusing on reducing fuel burn and emissions by improving aerodynamic efficiency and reducing weight through innovative wing technologies. Analyses were conducted for a 2D wing section with flow control applied to mitigate separation for landing performances.
aerodynamic design, compliant morphing flap, hybrid electric aircraft, evolutionary optimization
Publication
Design of a Light-Weight Vertical Tail for a Hybrid High-Altitude Pseudo-Satellite
Published on 2025-03-11 by Feliciano Di Biase, Domenico Varricchio, Vincenzo Rosario Baraniello, Giuseppe Persechino @MDPI
Abstract: The interest in high-altitude pseudo-satellites (HAPSs) has significantly increased in recent years due to the great versatility of these platforms, which allows them to be employed in a wide variety of applications in civilian and military fields. This study focuses on the design of an innovative hybrid airship vertical tail. The empennage proposed is internally sustained with a light-weight structure and coated with a thin film, avoiding any leakage that would occur with inflated structural el[...]
Our summary: Design of innovative hybrid airship vertical tail, Internally sustained with light-weight structure, Coated with thin film to avoid leakage, Detailed FE model for structural analysis.
Hybrid airship, Vertical tail, Light-weight structure, Finite element model
Publication
Analysis and Optimization of a Moving Magnet Permanent Magnet Synchronous Planar Motor with Split Halbach Arrays
Published on 2025-03-11 by Ronglu Wang, Lu Zhang, Chenyang Shi, Chunqiu Zhao, Kai Yang @MDPI
Abstract: This paper investigates an improved permanent magnet synchronous planar motor (PMSPM) featuring a moving magnet configuration to enhance thrust density and positioning accuracy. A novel split Halbach permanent magnet (PM) array is introduced, and the optimization begins with adjusting the pole size ratio α, analyzing the flux density distribution, and calculating thrust using an electromagnetic force model. Results demonstrate that the optimized Halbach array reduces thrust fluctua[...]
Our summary: Investigation of an improved permanent magnet synchronous planar motor with a moving magnet configuration and novel split Halbach permanent magnet array. Multi-objective optimization using NSGA fine-tunes auxiliary magnet width and magnetization angles, resulting in a 9.1% improvement in thrust density. Extensive simulations and experimental validation demonstrate superior performance in terms of thrust density and positioning precision.
Moving Magnet, Permanent Magnet Synchronous Motor, Split Halbach Arrays, Optimization
Publication
Aerodynamic Characteristics and Dynamic Stability of Coning Motion of Spinning Finned Projectile in Supersonic Conditions
Published on 2025-03-10 by Jintao Yin, Shengju Jiang, Yaowei Hu, Jiawei Zhang, Haochun Miao, Juanmian Lei @MDPI
Abstract: For a spinning projectile, coning motion induced by disturbances during flight can have a unique impact on the lateral force and yawing moment, which may further affect flight stability and maneuverability. The flow over a coupled spinning–coning projectile and a spinning projectile was numerically simulated by solving the unsteady Reynolds-averaged Navier–Stokes (URANS) equation with an implicit dual-time stepping method and a spinning–coning coupled mo[...]
Our summary: Impact of coning motion on lateral force and yawing moment analyzed through numerical simulation and dynamic mesh technique, revealing modifications to traditional angular motion theory and discussion on flight response to initial disturbance. Time-averaged lateral force and yawing moment of spinning-coning coupled projectile multiplied compared to spinning projectile, varying linearly with dimensionless spin rate and cone rate, with main factors affecting lateral force being coning motion-induced effective angle of sideslip, asymmetric expansion waves, and asymmetric vortices.
aerodynamic characteristics, dynamic stability, spinning projectile, coning motion
Publication
Method and apparatus for confirming boarding of passenger in uam environment
Patent published on the 2025-03-06 in WO under Ref WO2025048366 by KIA CORP [KR] (Jung Chang Hun [kr], Park Seung Wook [kr])
Abstract: A method and an apparatus for confirming boarding of a passenger in a UAM environment are disclosed. According to one aspect of the present disclosure, the provided method, which is performed by a fuselage system supporting a function of checking whether a user has boarded a fuselage and taken a reserved seat, comprises the steps of: receiving, from a user terminal, a first encryption token including reservation information of the user and identification proof information; receiving, from a flig[...]
Our summary: Method and apparatus for confirming boarding of passenger in UAM environment by using encryption tokens and symmetric key to verify user reservation and seat allocation.
boarding, passenger, UAM, fuselage
Patent
Inner bore coupling assembly
Patent published on the 2025-03-06 in WO under Ref WO2025049280 by BAKER HUGHES OILFIELD OPERATIONS LLC [US] (Deiters Arne [us], Huber Cord [us])
Abstract: A mounting system secures a component in a tubular, which includes a compression element and an annular flow guide. The flow guide is attached to the component by a threaded connection. The compression collar and flow guide have complementary profiles on their respective inner and outer surfaces, which when the compression collar is coaxially urged along the outer surface of the flow guide, the compression collar is radially expanded into compressive engagement with an inner surface of the tubul[...]
Our summary: Inner bore coupling assembly with compression collar, annular flow guide, and thrust ring for securing a component in a tubular with a threaded connection and resist loosening.
coupling assembly, mounting system, compression element, threaded connection
Patent
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