Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 64
Book Description
Transition Documentation on a Three-Element High-Lift Configuration at High Reynolds Numbers--Database
Author: Transition Documentation on a Three-Element High-Lift Configuration at High Reynolds Numbers: Analysis
Author: Transition Documentation on a Three-Element High-Lift Configuration at High Reynolds Numbers--Database. Conducted in the Langley Low Turbulence Pressure Tunnel
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781721029600
Category :
Languages : en
Pages : 60
Book Description
A 2-D (two dimensional) high-lift system experiment was conducted in August of 1996 in the Low Turbulence Pressure Tunnel at NASA Langley Research Center, Hampton, VA. The purpose of the experiment was to obtain transition measurements on a three element high-lift system for CFD (computational fluid dynamics) code validation studies. A transition database has been created using the data from this experiment. The present report details how the hot-film data and the related pressure data are organized in the database. Data processing codes to access the data in an efficient and reliable manner are described and limited examples are given on how to access the database and store acquired information.Bertelrud, Arild and Johnson, Sherylene and Anders, J. B. (Technical Monitor)Langley Research CenterDATA BASES; HIGH REYNOLDS NUMBER; LIFT; BOUNDARY LAYER TRANSITION; HOT-FILM ANEMOMETERS; COMPUTATIONAL FLUID DYNAMICS; DATA PROCESSING; LOW TURBULENCE
Transition Documentation on a Three-Element High-Lift Configuration at High Reynolds Numbers
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781721939084
Category :
Languages : en
Pages : 260
Book Description
A 2-D high-lift system experiment was conducted in August of 1996 in the Low Turbulence Pressure Tunnel at NASA Langley Research Center, Hampton, VA. The purpose of the experiment was to obtain transition measurements on a three element high-lift system for CFD code validation studies. A transition database has been created using the data from this experiment. The present report contains the analysis of the surface hot film data in terms of the transition locations on the three elements. It also includes relevant information regarding the pressure loads and distributions and the wakes behind the model to aid in the interpretation of the transition data. For some of the configurations the current pressure data has been compared with previous wind tunnel entries of the same model. The methodology used to determine the regions of transitional flow is outlined and each configuration tested has been analyzed. A discussion of interference effects, repeatability, and three-dimensional effects on the data is included. Bertelrud, Arild and Anders, J. B. (Technical Monitor) Langley Research Center NAS1-96014; RTOP 706-31-11-80
Scientific and Technical Aerospace Reports
Author: International Aerospace Abstracts
Author: Summary of Low Speed Airfoil Data
Author: Michael S. SeligPublisher: Soartech
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 320
Book Description
A History of Suction-Type Laminar-Flow Control with Emphasis on Flight Research
Author: National Aeronautics and Space AdministrationPublisher: CreateSpace
ISBN: 9781493794324
Category : History
Languages : en
Pages : 86
Book Description
Laminar-flow control is an area of aeronautical research that has a long history at NASA's Langley Research Center, Dryden Flight Research Center, their predecessor organizations, and elsewhere. In this monograph, Albert L. Braslow, who spent much of his career at Langley working with this research, presents a history of that portion of laminar-flow technology known as active laminar-flow control, which employs suction of a small quantity of air through airplane surfaces. This important technique offers the potential for significant reduction in drag and, thereby, for large increases in range or reductions in fuel usage for aircraft. For transport aircraft, the reductions in fuel consumed as a result of laminar-flow control may equal 30 percent of present consumption. Given such potential, it is obvious that active laminar-flow control with suction is an important technology. In this study, the author covers the early history of the subject and brings the story all the way to the mid-1990s with an emphasis on flight research, much of which occurred at Dryden.
Viscous Drag Reduction in Boundary Layers
Author: Publisher: AIAA
ISBN: 9781600863783
Category : Boundary layer
Languages : en
Pages : 542
Book Description
Aerodynamic Characteristics of the NACA 747A315 and 747A415 Airfoils from Tests in the NACA Two-dimensional Low-turbulence Pressure Tunnel
Author: Albert E. Von DoenhoffPublisher:
ISBN:
Category : Aerodynamic load
Languages : en
Pages : 24
Book Description
Summary: Two low-drag airfoils, the NACA 747A315 and the NACA 747A415, designed to have reduced pitching moments about the quarter-chord point and moderately high values of the design lift coefficient have been tested in the NACA two-dimensional low-turbulence pressure tunnel. Section lift, drag, and pitching-moment coefficients are presented for Reynolds numbers of 3 x 106, 6 x 106, and 9 x 106, together with section lift and section drag data for a Reynolds number of 6 x 106 for the same airfoils with roughened leading edges.