Author: A. A. HassanPublisher:
ISBN:
Category : Eddies
Languages : en
Pages : 212
Book Description
Blade-mounted Trailing Edge Flap Control for BVI Noise Reduction
Author: A. A. HassanBlade-Mounted Flap Control for BVI Noise Reduction Proof-of-Concept Test
Author: Blade-Mounted Trailing Edge Flap Control for Bvi Noise Reduction
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781723534973
Category :
Languages : en
Pages : 208
Book Description
Numerical procedures based on the 2-D and 3-D full potential equations and the 2-D Navier-Stokes equations were developed to study the effects of leading and trailing edge flap motions on the aerodynamics of parallel airfoil-vortex interactions and on the aerodynamics and acoustics of the more general self-generated rotor blade vortex interactions (BVI). For subcritical interactions, the 2-D results indicate that the trailing edge flap can be used to alleviate the impulsive loads experienced by the airfoil. For supercritical interactions, the results show the necessity of using a leading edge flap, rather than a trailing edge flap, to alleviate the interaction. Results for various time dependent flap motions and their effect on the predicted temporal sectional loads, differential pressures, and the free vortex trajectories are presented. For the OLS model rotor, contours of a BVI noise metric were used to quantify the effects of the trailing edge flap on the size and directivity of the high/low intensity noise region(s). Average reductions in the BVI noise levels on the order of 5 dB with moderate power penalties on the order of 18 pct. for a four bladed rotor and 58 pct. for a two bladed rotor were obtained. Hassan, A. A. and Charles, B. D. and Tadghighi, H. and Sankar, L. N. Unspecified Center NASA-CR-4426, NAS 1.26:4426 NAS1-19136; RTOP 505-63-36...
Scientific and Technical Aerospace Reports
Author: Monthly Catalog of United States Government Publications
Author: United States. Superintendent of DocumentsPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1072
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Smart Structures Theory
Author: Inderjit ChopraPublisher: Cambridge University Press
ISBN: 052186657X
Category : Science
Languages : en
Pages : 925
Book Description
This book focuses on smart materials and structures, which are also referred to as intelligent, adaptive, active, sensory, and metamorphic. The ultimate goal is to develop biologically inspired multifunctional materials with the capability to adapt their structural characteristics, monitor their health condition, perform self-diagnosis and self-repair, morph their shape, and undergo significant controlled motion.
The Shock and Vibration Digest
Author: Proceedings of the ASME Fluids Engineering Division Summer Conference--2006
Author: American Society of Mechanical Engineers. Fluids Engineering DivisionPublisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 992
Book Description
Author: Wel-Chong Sim
Author: