Prediction of the noise from a propeller at angle of attack [PDF]
An analysis is presented to predict the noise of a propeller at angle of attack. The analysis is an extension of that reported by Mani which predicted the change in noise due to angle of attack to both unsteady loading and to azimuthal variation of the ...
Krejsa, Eugene A.
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Observations of Cavitation on a Three-Dimensional Oscillating Hydrofoil [PDF]
, 1990 A test apparatus was designed and constructed to observe the effect of sinusoidal pitching oscillations on the cavitation of three-dimensional hydrofoils.
Acosta, A. J. +2 more
core
A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems
International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam +2 more
wiley +1 more source
Simulator study of the effectiveness of an automatic control system designed to improve the high-angle-of-attack characteristics of a fighter airplane [PDF]
A piloted, fixed-base simulation was conducted to study the effectiveness of some automatic control system features designed to improve the stability and control characteristics of fighter airplanes at high angles of attack.
Gilbert, W. P. +2 more
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Advanced Engineering Materials, EarlyView.Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat +6 more
wiley +1 more source
High-angle-of-attack pneumatic lag and upwash corrections for a hemispherical flow direction sensor [PDF]
As part of the NASA F-14 high angle of attack flight test program, a nose mounted hemispherical flow direction sensor was calibrated against a fuselage mounted movable vane flow angle sensor.
Deleo, Richard V. +5 more
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Advanced Engineering Materials, EarlyView.The release of foulers from protective marine coatings is determined by several interrelated material properties, including the strength of Young's modulus, the flexibility of chain segments, the surface free energy, and the magnitude of hydrodynamic stress.
Johann C. Schaal +2 more
wiley +1 more source
Studi Eksperimen dan Numerik Pengaruh Penambahan Vortex Generator pada Airfoil NASA LS-0417
Jurnal Teknik ITS, 2017 Separasi boundary layer merupakan fenomena penting yang mempengaruhi performansi airfoil. Salah satu upaya untuk menunda atau menghilangkan separasi aliran adalah meningkatkan momentum fluida untuk melawan adverse pressure dan tegangan geser permukaan ...
Ulul Azmi, Herman Sasongko
doaj
Experimental Investigation of Aerodynamic Noise Characteristics of Tandem Asymmetric Airfoils Across Varied Angles of Attack [PDF]
Journal of Applied Fluid MechanicsThis paper experimentally investigates the aerodynamic noise characteristics of a tandem asymmetric airfoil-airfoil at different angles of attack in the 0.5 m×0.4 m acoustic wind tunnel at Wenzhou University.
W. Shi, Y. Li, J. Zhou, Z. Chen
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Optimum subsonic, high-angle-of-attack nacelles [PDF]
The optimum design of nacelles that operate over a wide range of aerodynamic conditions and their inlets is described. For low speed operation the optimum internal surface velocity distributions and skin friction distributions are described for three ...
Diedrich, J. H. +2 more
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