Results 201 to 210 of about 971,693 (247)

Trailing-Edge Flap Placement

2015
The optimal location of flaps for multiple-flap configuration shown in Chap. 4 was obtained through parametric studies and the objective was to minimize only the hub vibration levels. These trailing-edge flaps are typically operated using piezoceramic actuators placed inside the blade section.
Ranjan Ganguli, Dipali Thakkar, Sathyamangalam Ramanarayanan Viswamurthy   +2 more
openaire   +1 more source

Semiempirical Method for Predicting Aerodynamics of Trailing-Edge Flaps

Journal of Spacecraft and Rockets, 2002
An improved semiempirical method has been developed to estimate the static aerodynamics of configurations that use a trailing-edge flap for control. The method is based on deflecting the full aft-located lifting surface by an amount that allows the normal force coefficient to be equal to that generated by the deflected flap.
Frank Moore, Thomas Hymer
openaire   +1 more source

A Numerical Study of Flapping Plates Hinged with a Trailing-Edge Flap

32nd AIAA Applied Aerodynamics Conference, 2014
In current work, effects of a controllable trailing-edge flap (TEF) on hovering flapping plates at low Reynolds number is computationally investigated. The leading-edge portion of flapping plate is driven by a prescribed kinematics in a horizontal stroke plane.
Yan Ren, Chengyu Li, Haibo Dong
openaire   +1 more source

Trailing‐edge Flaps

Aircraft Engineering and Aerospace Technology, 1937
THE reader who asks for more wood and less trees in technical discussions of wing flaps has my sympathy, since I have myself been responsible for some denseness of undergrowth. In this article 1 intend to avoid detail somewhat ruthlessly, to stand back and get a long view of the subject, to give, in fact, a freehand sketch rather than a blue print.
openaire   +1 more source

Swashplateless Helicopter Rotor with Trailing-Edge Flaps

Journal of Aircraft, 2004
A helicopter primary control system with trailing-edge flaps was investigated numerically for its potential to replace a conventional swashplate system. Eliminating the swashplate and associated control system can lead to significant reductions in weight, drag, and cost and an improvement of rotor performance.
Jinwei Shen, Inderjit Chopra
openaire   +1 more source

ON THE HYDROACOUSTICS OF A TRAILING EDGE WITH A DETACHED FLAP

Journal of Sound and Vibration, 2001
Abstract An analysis is made of production of sound by low Mach number turbulent flow over the trailing edge of a hydrofoil with a single detached flap. Following the approach advocated by Professor Doak in 1960 (Proceedings of the Royal Society A 254 , 129–145), an aeroacoustic Green function is derived for a hydrofoil of large chord with a ...
openaire   +1 more source

Drag Reduction on Gurney Flaps and Divergent Trailing Edges

2001
Miniflaps at the trailing edges of airfoils (e.g., Gurney flaps or divergent trailing edges) change the Kutta condition and thus produce higher lift. Unfortunately, however, the drag is also increased due to the flow separation downstream of this particular type of trailing edge.
Meyer, R., Bechert, D. W., Hage, W.
openaire   +3 more sources

Flap Architecture by Morphing Trailing Edges

International Journal of Current Engineering and Technology, 2010
This paper proposes flap architecture for a variable camber trailing edge, whose reference geometry is based on a full scale wing for a regional transport aircraft. The compliant rib is based on a truss-like structure where some members are active rods made of Shape Memory Alloy (SMA).
openaire   +1 more source

Helicopter vibration reduction with trailing edge flaps

36th Structures, Structural Dynamics and Materials Conference, 1995
Main rotor blades with plain trailing edge flaps are investigated as a potential means of vibration reduction using a comprehensive rotorcraft analysis. The analysis is modified to incorporate an unsteady aerodynamic model including flap effects. Predicted blade and pitch link loads show adequate correlation with experimental data. An initial open loop
Judah Milgram, Inderjit Chopra
openaire   +1 more source

Design and Optimization of an Airfoil with Active Continuous Trailing-Edge Flap

Proceedings of the Vertical Flight Society 69th Annual Forum and Technology Display, 2013
This paper presents the design and optimization of an airfoil with active continuous trailing-edge flap (CTEF) investigated as a potential rotorcraft active control device. Several structural cross-section models are developed: high-fidelity NASTRAN and UM/VABS models and a reduced order analysis model.
Jinwei Shen, Yi Liu, Robert P. Thornburgh, Andrew R. Kreshock, Matthew L. Wilbur   +4 more
openaire   +1 more source