Current models for the dissociation rate and the vibration-dissociation coupling process are used to simulate several recent hypervelocity experiments. It is shown that all of the models accurately predict the shock standoff distance for a spherical, blunt-body flow. However, the computational results do not agree with a set of experiments that was designed to be sensitive to the chemical kinetics model. In these highly separated flows, the equilibrium dissociation rate must be increased or decreased by a factor of about four to obtain reasonable agreement with the data. This puts into doubt the accuracy of the reaction rate, or indicates that some other unknown thermo-chemical process occurs in these flows.
|Published - 1997
|32nd Thermophysics Conference, 1997 - Atlanta, United States
Duration: Jun 23 1997 → Jun 25 1997
|32nd Thermophysics Conference, 1997
|6/23/97 → 6/25/97
Bibliographical noteFunding Information:
We would like to thank Prof. Hans Hornung of the Graduate Aeronautical Laboratories at Caltech for his collaboration on this work. The work was supported by the Air Force Office of Scientific Research Grant No. F49620-93-1-0338. Computer time was provided by the Minnesota Supercomputer Institute. This work is also sponsored in part by the Army High Performance Computing Research Center under the auspices of the Department of the Army, Army Research Laboratory cooperative agreement number DAAH04-95-2- 0003/contract number DAAH04-95-C-0008, the content of which does not necessarily reflect the position or the policy of the government, and no official endorsement should be inferred.
© 1997 by Graham V. Candler.