Author: Jack D. Coats
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 64
Book Description
A series of tests has been conducted at free-stream Mach numbers four and eight to determine the effectiveness of three-dimensional boundary-layer trips in promoting transition on very blunt axisymmetric bodies with near equilibrium wall temperatures. Temperature distributions obtained with temperature sensing gages inserted in the model surface were used to locate boundary-layer transition at Mach number four, and qualitative results, based on pitot pressure measurements, were obtained at Mach number eight. A simple modification of a technique proposed by van Driest and Blummer for determining an effective trip size for blunt bodies is shown to yield a correlation applicable to their data on a sphere at Mach number two and the present configurations at Mach number four.
Investigation of the Effects of Nose Bluntness on Natural and Induced Boundary-layer Transition on Axisymmetric Bodies in Supersonic Flow
Author: Jack D. Coats
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 64
Book Description
A series of tests has been conducted at free-stream Mach numbers four and eight to determine the effectiveness of three-dimensional boundary-layer trips in promoting transition on very blunt axisymmetric bodies with near equilibrium wall temperatures. Temperature distributions obtained with temperature sensing gages inserted in the model surface were used to locate boundary-layer transition at Mach number four, and qualitative results, based on pitot pressure measurements, were obtained at Mach number eight. A simple modification of a technique proposed by van Driest and Blummer for determining an effective trip size for blunt bodies is shown to yield a correlation applicable to their data on a sphere at Mach number two and the present configurations at Mach number four.
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 64
Book Description
A series of tests has been conducted at free-stream Mach numbers four and eight to determine the effectiveness of three-dimensional boundary-layer trips in promoting transition on very blunt axisymmetric bodies with near equilibrium wall temperatures. Temperature distributions obtained with temperature sensing gages inserted in the model surface were used to locate boundary-layer transition at Mach number four, and qualitative results, based on pitot pressure measurements, were obtained at Mach number eight. A simple modification of a technique proposed by van Driest and Blummer for determining an effective trip size for blunt bodies is shown to yield a correlation applicable to their data on a sphere at Mach number two and the present configurations at Mach number four.
Artificially Induced Boundary-layer Transition on Blunt-slender Cones Using Distributed Roughness and Spherical-type Tripping Devices at Hypersonic Speeds
Author: Albert H. Boudreau
Publisher:
ISBN:
Category : Aerodynamics, Hypersonic
Languages : en
Pages : 50
Book Description
Research directed toward establishing criteria for distributed roughness-type boundary-layer trips on blunt-slender cones has been conducted in the AEDC/VKF at Mach numbers from 8 to 13. Results indicate that distributed roughness trips are superior to spherical-type trips in that equally effective distributed roughness trips are one-fifth as high and produce substantially smaller flow-field disturbances. Criteria are defined for optimum utilization of distributed roughness trips.
Publisher:
ISBN:
Category : Aerodynamics, Hypersonic
Languages : en
Pages : 50
Book Description
Research directed toward establishing criteria for distributed roughness-type boundary-layer trips on blunt-slender cones has been conducted in the AEDC/VKF at Mach numbers from 8 to 13. Results indicate that distributed roughness trips are superior to spherical-type trips in that equally effective distributed roughness trips are one-fifth as high and produce substantially smaller flow-field disturbances. Criteria are defined for optimum utilization of distributed roughness trips.
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1572
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1572
Book Description
Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States
Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 536
Book Description
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 536
Book Description
Japanese Science and Technology, 1983-1984
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1080
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1080
Book Description
OAR Cumulative Index of Research Results
Author: United States. Air Force. Office of Aerospace Research
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 550
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 550
Book Description
A Collection of Technical Papers
Author:
Publisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 1060
Book Description
Publisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 1060
Book Description
Master's Theses and Doctoral Dissertations in the Pure and Applied Sciences
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 172
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 172
Book Description
Aeronautical Engineering
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 580
Book Description
A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 580
Book Description
A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)
The University of Tennessee Record
Author: University of Tennessee
Publisher:
ISBN:
Category :
Languages : en
Pages : 154
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 154
Book Description