Author: Albert E. Von Doenhoff
Publisher:
ISBN:
Category : Dichlorodifluoromethane
Languages : en
Pages : 668
Book Description
A number of studies relating to the use of Freon-12 as a substitute medium for air in aerodynamic testing have been made. The use of Freon-12 instead of air makes possible large savings in wind-tunnel drive power. Because of the fact that the ratio of specific heats is approximately 1.13 for Freon-12 as compared with 1.4 for air, some differences exist between data obtained in Freon-12 and air. Methods for predicting aerodynamic characteristics of bodies in air from data obtained in Freon-12, however, have been developed from the concept of similarity of the streamline pattern. These methods, derived from consideration of two-dimensional flows, provide substantial agreement in all cases for which comparative data are available. These data consist of measurements throughout a range of Mach number from approximately 0.4 to 1.2 of pressure distributions and hinge moments on swept and unswept wings having aspect ratios ranging from 4.0 to 9.0, including cases where a substantial part of the wing was stalled.
Studies of the Use of Freon-12 as a Wind-tunnel Testing Medium
Author: Albert E. Von Doenhoff
Publisher:
ISBN:
Category : Dichlorodifluoromethane
Languages : en
Pages : 668
Book Description
A number of studies relating to the use of Freon-12 as a substitute medium for air in aerodynamic testing have been made. The use of Freon-12 instead of air makes possible large savings in wind-tunnel drive power. Because of the fact that the ratio of specific heats is approximately 1.13 for Freon-12 as compared with 1.4 for air, some differences exist between data obtained in Freon-12 and air. Methods for predicting aerodynamic characteristics of bodies in air from data obtained in Freon-12, however, have been developed from the concept of similarity of the streamline pattern. These methods, derived from consideration of two-dimensional flows, provide substantial agreement in all cases for which comparative data are available. These data consist of measurements throughout a range of Mach number from approximately 0.4 to 1.2 of pressure distributions and hinge moments on swept and unswept wings having aspect ratios ranging from 4.0 to 9.0, including cases where a substantial part of the wing was stalled.
Publisher:
ISBN:
Category : Dichlorodifluoromethane
Languages : en
Pages : 668
Book Description
A number of studies relating to the use of Freon-12 as a substitute medium for air in aerodynamic testing have been made. The use of Freon-12 instead of air makes possible large savings in wind-tunnel drive power. Because of the fact that the ratio of specific heats is approximately 1.13 for Freon-12 as compared with 1.4 for air, some differences exist between data obtained in Freon-12 and air. Methods for predicting aerodynamic characteristics of bodies in air from data obtained in Freon-12, however, have been developed from the concept of similarity of the streamline pattern. These methods, derived from consideration of two-dimensional flows, provide substantial agreement in all cases for which comparative data are available. These data consist of measurements throughout a range of Mach number from approximately 0.4 to 1.2 of pressure distributions and hinge moments on swept and unswept wings having aspect ratios ranging from 4.0 to 9.0, including cases where a substantial part of the wing was stalled.
Technical Note - National Advisory Committee for Aeronautics
Author: United States. National Advisory Committee for Aeronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 886
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 886
Book Description
NASA Technical Note
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 910
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 910
Book Description
Research Abstracts
Author: United States. National Advisory Committee for Aeronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 568
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 568
Book Description
TID.
Author:
Publisher:
ISBN:
Category : Energy development
Languages : en
Pages : 184
Book Description
Publisher:
ISBN:
Category : Energy development
Languages : en
Pages : 184
Book Description
Heat Transfer
Author: James M. Jacobs
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 180
Book Description
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 180
Book Description
Nuclear Science Abstracts
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1308
Book Description
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1308
Book Description
NASA Technical Paper
Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 418
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 418
Book Description
NASA Technical Paper
Report
Author: United States. National Advisory Committee for Aeronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 42
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 42
Book Description