Results 71 to 80 of about 66,325 (272)
Engineering Reports, Volume 7, Issue 7, July 2025.FR‐FMEA combines fuzzy logic and rough set theory to address uncertainty and incomplete knowledge in failure analysis. Applied to a gas turbine system, it delivers more reliable and distinct risk rankings, identifying critical components for targeted maintenance and improved reliability.
Ali Aghazadeh Ardebili +2 more
wiley +1 more source
Wind Energy, Volume 28, Issue 7, July 2025.ABSTRACT As the demand for power increases, installing small‐scale wind turbines can be an alternative solution. However, the main challenge for their implementation is the aerodynamic noise. With a view to minimizing noise, this study focuses on the performance investigation of a small‐scale horizontal‐axis wind turbine with NACA 4412 blades inspired ...
Hasan Muhommod Robin +4 more
wiley +1 more source
Известия высших учебных заведений России: Радиоэлектроника, 2019 Introduction. The basis for solving the problem of aircraft recognition is the formation of radar portraits, reflecting the constructive features of aerial vehicles.
Sergey R. Heister, Thai T. Nguyn
doaj +1 more source
Panel/full-span free-wake coupled method for unsteady aerodynamics of helicopter rotor blade
, 2013 A full-span free-wake method is coupled with an unsteady panel method to accurately predict the unsteady aerodynamics of helicopter rotor blades in hover and forward flight.
J. Tan, Wang Haowen
semanticscholar +1 more source
A Review of Modeling and Control Techniques for Unmanned Aerial Vehicles
Engineering Reports, Volume 7, Issue 6, June 2025.By systematically classifying UAV modeling techniques and comparing control methods, this paper addresses a notable gap in the current literature. Furthermore, it highlights emerging trends and challenges in UAV control systems, providing valuable insights to guide future research toward enhancing the stability, efficiency, and adaptability of ...
Elisabeth Andarge Gedefaw +2 more
wiley +1 more source
Development of an unsteady aerodynamics model to improve correlation of computed blade stresses with test data [PDF]
, 1985 A reliable rotor aeroelastic analysis operational that correctly predicts the vibration levels for a helicopter is utilized to test various unsteady aerodynamics models with the objective of improving the correlation between test and theory.
Gangwani, S. T.
core +1 more source
Continuous Adjoint to Proudman's Formula for Aeroacoustic Shape Optimization
International Journal for Numerical Methods in Fluids, Volume 97, Issue 6, Page 966-984, June 2025.This paper presents a cost‐efficient framework for aeroacoustic shape optimization by developing the adjoint to Proudman's formula, coupled with the steady‐state RANS equations and the k‐ ω$$ \omega $$ SST turbulence model. The aeroacoustic model and the adjoint solver are initially validated/verified with experimental data/finite differences, before ...
M. Erfan Farhikhteh +2 more
wiley +1 more source
A rotor-mounted digital instrumentation system for helicopter blade flight research measurements [PDF]
A rotor mounted flight instrumentation system developed for helicopter rotor blade research is described. The system utilizes high speed digital techniques to acquire research data from miniature pressure transducers on advanced rotor airfoils which are ...
Haywood, W. S., Jr. +2 more
core +1 more source
Wind Energy, Volume 28, Issue 6, June 2025.ABSTRACT Wind turbines operating in unsteady and complex environments often encounter asymmetric and unsteady vortex flows on the suction side of the blade, leading to airflow separation and dynamic stall. These issues significantly impact the aerodynamic performance and energy efficiency of wind turbines. Trailing edge flaps are an active flow control
S. U. N. ZhiXin +2 more
wiley +1 more source
Helicopter far-field acoustic levels as a function of reduced main-rotor advancing blade-tip Mach number [PDF]
During the design of a helicopter, the weight, engine, rotor speed, and rotor geometry are given significant attention when considering the specific operations for which the helicopter will be used. However, the noise radiated from the helicopter and its
Lemasurier, Philip +2 more
core +1 more source