Author: Klaus WillekePublisher:
ISBN:
Category : Gases at high temperatures
Languages : en
Pages : 124
Book Description
Shock-tube Study of the Transient Thermal Behavior of Gases at High Temperatures
Author: Klaus WillekePublisher:
ISBN:
Category : Gases at high temperatures
Languages : en
Pages : 124
Book Description
Shock-tube Study of the Transient Thermal Behavior of Gases at High-temperature
Author: Stanford University. Department of Aeronautics and AstronauticsPublisher:
ISBN:
Category : Gases
Languages : en
Pages : 78
Book Description
The Shock Tube in High-temperature Chemical Physics
Author: Alfred Gordon GaydonPublisher:
ISBN:
Category : Science
Languages : en
Pages : 338
Book Description
High Temperature Phenomena in Shock Waves
Author: Raymond BrunPublisher: Springer Science & Business Media
ISBN: 3642251196
Category : Technology & Engineering
Languages : en
Pages : 344
Book Description
The high temperatures generated in gases by shock waves give rise to physical and chemical phenomena such as molecular vibrational excitation, dissociation, ionization, chemical reactions and inherently related radiation. In continuum regime, these processes start from the wave front, so that generally the gaseous media behind shock waves may be in a thermodynamic and chemical non-equilibrium state. This book presents the state of knowledge of these phenomena. Thus, the thermodynamic properties of high temperature gases, including the plasma state are described, as well as the kinetics of the various chemical phenomena cited above. Numerous results of measurement and computation of vibrational relaxation times, dissociation and reaction rate constants are given, and various ionization and radiative mechanisms and processes are presented. The coupling between these different phenomena is taken into account as well as their interaction with the flow-field. Particular points such as the case of rarefied flows and the inside of the shock wave itself are also examined. Examples of specific non-equilibrium flows are given, generally corresponding to those encountered during spatial missions or in shock tube experiments.
Wall Heat Transfer Effects in the Endwall Region Behind a Reflected Shock Wave at Long Test Times
Author: Corey FrazierPublisher:
ISBN:
Category : Heat
Languages : en
Pages : 173
Book Description
Shock-tube experiments are typically performed at high temperatures ([greater than]1200K) due to test-time constraints. These test times are usually ~1 ms in duration and the source of this short, test-time constraint is loss of temperature due to heat transfer. At short test times, there is very little appreciable heat transfer between the hot gas and the cold walls of the shock tube and a high test temperature can be maintained. However, some experiments are using lower temperatures (approx. 800K) to achieve ignition and require much longer test times (up to 15 ms) to fully study the chemical kinetics and combustion chemistry of a reaction in a shock-tube experiment. Using mathematical models, analysis was performed studying the effects of temperature, pressure, shock-tube inner diameter, and test-port location at various test times (from 1-20 ms) on temperature maintenance. Three models, each more complex than the previous, were used to simulate test conditions in the endwall region behind the reflected shock wave with Ar and N2 as bath gases. Temperature profile, thermal BL thickness, and other parametric results are presented herein. It was observed that higher temperatures and lower pressures contributed to a thicker thermal boundary layer, as did shrinking inner diameter. Thus it was found that a test case such as 800K and 50 atm in a 16.2-cm-diameter shock tube in Argon maintained thermal integrity much better than other cases-- pronounced by a thermal boundary layer [less than]1 mm thick and an average temperature [greather than] 799.9 K from 1-20 ms.
A Theory for Predicting the Flow of Real Gases in Shock Tubes with Experimental Verification
Author: Robert L. TrimpiPublisher:
ISBN:
Category : Gas flow
Languages : en
Pages : 674
Book Description
The nonlinear characteristic differential equations applicable to a quasi-one-dimensional unsteady channel flow with friction and heat transfer are linearized and integrated in functional form for the particular study of small perturbations from ideal shock-tube flows. If the equivalence of unsteady- and steady-flow boundary layers is assumed, the problem of determining the perturbation in the unsteady flow reduces to an evaluation of the drag of a flat plate in the equivalent steady flow.
An Electromagnetic Shock Tube for Study of Magneto-gas Dynamics and High Temperature Properties of Gases
Author: Charles E. PaxPublisher:
ISBN:
Category : Ionized gases
Languages : en
Pages :
Book Description
An Analysis of an Adiabatic Combustion Driver for Shock Tube Applications
Author: Elsayed Ahmed MogahedPublisher:
ISBN:
Category : Gases
Languages : en
Pages : 198
Book Description
Evaluation of Expansion Chambers in Shock-tube Experiments with Mass Addition
Author: Horst P. RichterPublisher:
ISBN:
Category : Experiments
Languages : en
Pages : 14
Book Description
Shock-tube Flow Analysis with a Dimensionless Velocity Number
Author: N. Muniswamy ReddyPublisher:
ISBN:
Category : Measurement
Languages : en
Pages : 28
Book Description
Shock tube flow analysis with dimensionless velocity number.