Author: Ing D. Hummel
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
Book Description
Within the framework of some theses hypersonic flows have been investigated theoretically as well as by experiments in the hypersonic facility Gun Tunnel of the institute. Some of these activities during the last years are summarized. The first problem is of a blunt body of revolution with subsonic blowing in the stagnation point region against the hypersonic main flow. Surface pressure and heat transfer measurements have been carried out for two bodies at different free-stream Machnumbers and for various blowing rates. Remarkable agreement has been obtained in comparison with a combination of Newtonian and potential theory. The second problem is of the hypersonic flow in corners formed by intersecting swept wedges. The corner angle and the leading-edge sweep angle have been varied systematically. The flow field has been analysed by means of pitot pressure measurements in a characteristic cross-section and the flow structure near the wall has been determined from oilflow pictures as well as from wall pressure and heat transfer measurements. Strong vortical flows have been detected underneath the corner shock system. Starting from a 90 deg corner of unswept wedges, the heat flux in the corner center can be reduced considerably by increasing the corner angle and by sweeping the leading-edges back.
Experimental Investigations on Blunt Bodies and Corner Configurations in Hypersonic Flow
Author: Ing D. Hummel
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
Book Description
Within the framework of some theses hypersonic flows have been investigated theoretically as well as by experiments in the hypersonic facility Gun Tunnel of the institute. Some of these activities during the last years are summarized. The first problem is of a blunt body of revolution with subsonic blowing in the stagnation point region against the hypersonic main flow. Surface pressure and heat transfer measurements have been carried out for two bodies at different free-stream Machnumbers and for various blowing rates. Remarkable agreement has been obtained in comparison with a combination of Newtonian and potential theory. The second problem is of the hypersonic flow in corners formed by intersecting swept wedges. The corner angle and the leading-edge sweep angle have been varied systematically. The flow field has been analysed by means of pitot pressure measurements in a characteristic cross-section and the flow structure near the wall has been determined from oilflow pictures as well as from wall pressure and heat transfer measurements. Strong vortical flows have been detected underneath the corner shock system. Starting from a 90 deg corner of unswept wedges, the heat flux in the corner center can be reduced considerably by increasing the corner angle and by sweeping the leading-edges back.
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
Book Description
Within the framework of some theses hypersonic flows have been investigated theoretically as well as by experiments in the hypersonic facility Gun Tunnel of the institute. Some of these activities during the last years are summarized. The first problem is of a blunt body of revolution with subsonic blowing in the stagnation point region against the hypersonic main flow. Surface pressure and heat transfer measurements have been carried out for two bodies at different free-stream Machnumbers and for various blowing rates. Remarkable agreement has been obtained in comparison with a combination of Newtonian and potential theory. The second problem is of the hypersonic flow in corners formed by intersecting swept wedges. The corner angle and the leading-edge sweep angle have been varied systematically. The flow field has been analysed by means of pitot pressure measurements in a characteristic cross-section and the flow structure near the wall has been determined from oilflow pictures as well as from wall pressure and heat transfer measurements. Strong vortical flows have been detected underneath the corner shock system. Starting from a 90 deg corner of unswept wedges, the heat flux in the corner center can be reduced considerably by increasing the corner angle and by sweeping the leading-edges back.
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1460
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1460
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Government Reports Announcements & Index
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1102
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1102
Book Description
U.S. Government Research Reports
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 870
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 870
Book Description
Research and Technology Program Digest Flash Index
Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 794
Book Description
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 794
Book Description
Future Aerospace Technology in the Service of the Alliance: Sustained hypersonic flight
Author:
Publisher:
ISBN:
Category : Aerodynamics, Hypersonic
Languages : en
Pages : 440
Book Description
Publisher:
ISBN:
Category : Aerodynamics, Hypersonic
Languages : en
Pages : 440
Book Description
Proceedings
Author:
Publisher:
ISBN:
Category : Astrophysics
Languages : en
Pages : 544
Book Description
Publisher:
ISBN:
Category : Astrophysics
Languages : en
Pages : 544
Book Description
The Aeronautical Journal
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 664
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 664
Book Description
Aerodynamics of Space Vehicles
Author:
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 68
Book Description
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 68
Book Description
Proceedings of the NASA-University Conference on the Science and Technology of Space Exploration
Author:
Publisher:
ISBN:
Category : Outer space
Languages : en
Pages : 544
Book Description
A Chinese boy's greatest wish is to be an artist but he is too poor to buy a good brush until a wizard appears and gives him one with magic powers.
Publisher:
ISBN:
Category : Outer space
Languages : en
Pages : 544
Book Description
A Chinese boy's greatest wish is to be an artist but he is too poor to buy a good brush until a wizard appears and gives him one with magic powers.