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Author: Louis A. Cassel
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 420
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Book Description
Interference effects between a highly underexpanded, sonic or supersonic jet in a subsonic or supersonic crossflow, and the surface from which the jet exhausts are examined. For subsonic freestream Mach numbers, existing data are examined and correlated. Various semi-empirical models to represent the interference pressure distribution on flat plates are then developed. For supersonic freestream Mach numbers, a computer program for calculating jet interference effects on axisymmetric bodies at angle of attack is described. Interference effects between the jet plume and control fins on a cruciform missile are analyzed. A semi-empirical model of the jet in a crossflow, valid at large distances from the nozzle is developed. The results of this model are then used to compute interference forces and moments on fins located aft of the nozzle, both for subsonic and for supersonic freestream Mach numbers.
Author: Louis A. Cassel
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 420
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Book Description
Interference effects between a highly underexpanded, sonic or supersonic jet in a subsonic or supersonic crossflow, and the surface from which the jet exhausts are examined. For subsonic freestream Mach numbers, existing data are examined and correlated. Various semi-empirical models to represent the interference pressure distribution on flat plates are then developed. For supersonic freestream Mach numbers, a computer program for calculating jet interference effects on axisymmetric bodies at angle of attack is described. Interference effects between the jet plume and control fins on a cruciform missile are analyzed. A semi-empirical model of the jet in a crossflow, valid at large distances from the nozzle is developed. The results of this model are then used to compute interference forces and moments on fins located aft of the nozzle, both for subsonic and for supersonic freestream Mach numbers.
Author: J. W. Barnes
Publisher:
ISBN:
Category : Aerodynamic load
Languages : en
Pages : 246
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Book Description
Author: E. Collin
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
In a lot of industrial applications, especially in ejectors and propulsive jets, most of the dynamical behaviour of the system is strongly influenced by the mixing efficiency in a supersonic jet. This is particularly the case when dilution of hot propulsive jets is required for example to reduce infrared signature of a military aircraft. Many mechanical devices have been used to increase mixing in free shear flows. Most of these devices stimulate the activity of longitudinal vortices naturally occurring in mixing layers. For instance, the insertion of small tabs on the splitter plate of a plane mixing layer, or in the nozzle of a jet, produces large and small-scale vortical motions. This results in a strong distortion of the mean flow and a strong mixing enhancement. In order to prepare the development of an active hyper-mixing method, Davis studied a pneumatic device. A schematic arrangement of this device is shown in figure 1. It is generally admitted that transverse jets generate longitudinal vorticity in a crossflow. Several control jets (CJ) can be used in order to improve the mixing in the initial part of a supersonic jet. This kind of device has been proved to be efficient in subsonic flows. The question arises of the behaviour of such control jets in supersonic flows.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 648
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Author: F. W. Spaid
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 78
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Author: W. T. Strike
Publisher:
ISBN:
Category : Aerodynamic load
Languages : en
Pages : 260
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 956
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Author: American Institute of Aeronautics and Astronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1380
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Author: Troy A. Street
Publisher:
ISBN:
Category :
Languages : en
Pages : 696
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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 828
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