Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722673819
Category :
Languages : en
Pages : 58
Book Description
Axisymmetric numerical simulations with finite-rate chemistry are presented for two operating conditions in the HYPULSE expansion tube. The operating gas for these two cases is nitrogen and the computations are compared to experimental data. One test condition is at a total enthalpy of 15.2 MJ/Kg and a relatively low static pressure of 2 kPa. This case is characterized by a laminar boundary layer and significant chemical nonequilibrium in the acceleration gas. The second test condition is at a total enthalpy of 10.2 MJ/Kg and a static pressure of 38 kPa and is characterized by a turbulent boundary layer. For both cases, the time-varying test gas pressure predicted by the simulations is in good agreement with experimental data. The computations are also found to be in good agreement with Mirels' correlations for shock tube flow. It is shown that the nonuniformity of the test gas observed in the HYPULSE expansion tube is strongly linked to the boundary layer thickness. The turbulent flow investigated has a larger boundary layer and greater test gas nonuniformity. In order to investigate possibilities of improving expansion tube flow quality by reducing the boundary layer thickness, parametric studies showing the effect of density and turbulent transition point on the test conditions are also presented. Although an increase in the expansion tube operating pressure level would reduce the boundary layer thickness, the simulations indicate that the reduction would be less than what is predicted by flat plate boundary layer correlations. Wilson, Gregory J. and Sussman, Myles A. and Bakos, Robert J. Ames Research Center...
Numerical Simulations of the Flow in the Hypulse Expansion Tube
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722673819
Category :
Languages : en
Pages : 58
Book Description
Axisymmetric numerical simulations with finite-rate chemistry are presented for two operating conditions in the HYPULSE expansion tube. The operating gas for these two cases is nitrogen and the computations are compared to experimental data. One test condition is at a total enthalpy of 15.2 MJ/Kg and a relatively low static pressure of 2 kPa. This case is characterized by a laminar boundary layer and significant chemical nonequilibrium in the acceleration gas. The second test condition is at a total enthalpy of 10.2 MJ/Kg and a static pressure of 38 kPa and is characterized by a turbulent boundary layer. For both cases, the time-varying test gas pressure predicted by the simulations is in good agreement with experimental data. The computations are also found to be in good agreement with Mirels' correlations for shock tube flow. It is shown that the nonuniformity of the test gas observed in the HYPULSE expansion tube is strongly linked to the boundary layer thickness. The turbulent flow investigated has a larger boundary layer and greater test gas nonuniformity. In order to investigate possibilities of improving expansion tube flow quality by reducing the boundary layer thickness, parametric studies showing the effect of density and turbulent transition point on the test conditions are also presented. Although an increase in the expansion tube operating pressure level would reduce the boundary layer thickness, the simulations indicate that the reduction would be less than what is predicted by flat plate boundary layer correlations. Wilson, Gregory J. and Sussman, Myles A. and Bakos, Robert J. Ames Research Center...
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722673819
Category :
Languages : en
Pages : 58
Book Description
Axisymmetric numerical simulations with finite-rate chemistry are presented for two operating conditions in the HYPULSE expansion tube. The operating gas for these two cases is nitrogen and the computations are compared to experimental data. One test condition is at a total enthalpy of 15.2 MJ/Kg and a relatively low static pressure of 2 kPa. This case is characterized by a laminar boundary layer and significant chemical nonequilibrium in the acceleration gas. The second test condition is at a total enthalpy of 10.2 MJ/Kg and a static pressure of 38 kPa and is characterized by a turbulent boundary layer. For both cases, the time-varying test gas pressure predicted by the simulations is in good agreement with experimental data. The computations are also found to be in good agreement with Mirels' correlations for shock tube flow. It is shown that the nonuniformity of the test gas observed in the HYPULSE expansion tube is strongly linked to the boundary layer thickness. The turbulent flow investigated has a larger boundary layer and greater test gas nonuniformity. In order to investigate possibilities of improving expansion tube flow quality by reducing the boundary layer thickness, parametric studies showing the effect of density and turbulent transition point on the test conditions are also presented. Although an increase in the expansion tube operating pressure level would reduce the boundary layer thickness, the simulations indicate that the reduction would be less than what is predicted by flat plate boundary layer correlations. Wilson, Gregory J. and Sussman, Myles A. and Bakos, Robert J. Ames Research Center...
Numerical Simulations of the Flow in the HYPULSE Expansion Tube
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 58
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 58
Book Description
Numerical Simulation of Transient Hypervelocity Flow in an Expansion Tube
Author: P. A. Jacobs
Publisher:
ISBN:
Category : Unsteady flow (Aerodynamics)
Languages : en
Pages : 64
Book Description
Publisher:
ISBN:
Category : Unsteady flow (Aerodynamics)
Languages : en
Pages : 64
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 652
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 : 652
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.
Shock Waves - Proceedings Of The 20th International Symposium (In 2 Volumes)
Author: Hans G Hornung
Publisher: World Scientific
ISBN: 9814548022
Category :
Languages : en
Pages : 1740
Book Description
The symposia take place every two years. They are the forum at which scientists concerned with shock waves present their research. They USE shock waves for chemical kinetics studies, for materials studies, and smashing kidney stones; they STUDY the phenomena associated with flows involving shock waves, such as supersonic flow, explosions, detonations, volcanic eruptions, and, in this symposium, even such with-it topics as impact of Shoemaker-Levy on Jupiter and blast waves in the World Trade Center. They also discover new, bigger and better ways of generating flows at hypervelocity speeds and develop their technological tools further.The international exchange of information is documented in the proceedings volumes, which have become a storehouse of information on the subject, documenting the history of this peculiar branch of science that involves chemists, physicists, engineers, geophysicists, material scientists and biologists.
Publisher: World Scientific
ISBN: 9814548022
Category :
Languages : en
Pages : 1740
Book Description
The symposia take place every two years. They are the forum at which scientists concerned with shock waves present their research. They USE shock waves for chemical kinetics studies, for materials studies, and smashing kidney stones; they STUDY the phenomena associated with flows involving shock waves, such as supersonic flow, explosions, detonations, volcanic eruptions, and, in this symposium, even such with-it topics as impact of Shoemaker-Levy on Jupiter and blast waves in the World Trade Center. They also discover new, bigger and better ways of generating flows at hypervelocity speeds and develop their technological tools further.The international exchange of information is documented in the proceedings volumes, which have become a storehouse of information on the subject, documenting the history of this peculiar branch of science that involves chemists, physicists, engineers, geophysicists, material scientists and biologists.
AIAA 7th International Spaceplanes and Hypersonic Systems & Technology Conference
Author:
Publisher:
ISBN:
Category : Aerospace planes
Languages : en
Pages : 526
Book Description
Publisher:
ISBN:
Category : Aerospace planes
Languages : en
Pages : 526
Book Description
Numerical Simulation of Transient Hypervelocity Flow in an Expansion Tube
Author: P. A. Jacobs
Publisher:
ISBN:
Category : Unsteady flow (Aerodynamics)
Languages : en
Pages : 56
Book Description
Publisher:
ISBN:
Category : Unsteady flow (Aerodynamics)
Languages : en
Pages : 56
Book Description
35th Aerospace Sciences Meeting & Exhibit
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 654
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 654
Book Description
Scramjet Propulsion
Author: E. T. Curran
Publisher: AIAA
ISBN: 9781600864414
Category : Airplanes
Languages : en
Pages : 1354
Book Description
Publisher: AIAA
ISBN: 9781600864414
Category : Airplanes
Languages : en
Pages : 1354
Book Description
Government Reports Announcements & Index
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 928
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 928
Book Description