Digitale Medien
New York, NY
:
American Institute of Physics (AIP)
Physics of Fluids
3 (1991), S. 803-821
ISSN:
1089-7666
Quelle:
AIP Digital Archive
Thema:
Physik
Notizen:
High-temperature effects alter the physical and transport properties of a gas, air in particular, due to vibrational excitation and gas dissociation, and thus the chemical reactions have to be considered in order to compute the flow field. Linear stability of high-temperature boundary layers is investigated under the assumption of chemical equilibrium and this gas model is labeled here as "real gas model.'' In this model, the system of stability equations remains of the same order as for the perfect gas and the effect of chemical reactions is introduced only through mean flow and gas property variations. Calculations are performed for Mach 10 and 15 boundary layers and the results indicate that real gas effects cause the first mode instability to stabilize while the second mode is made more unstable. It is also found that the second mode instability shifts to lower frequencies. There is a slight destabilizing influence of real gas on the Goertler instability as compared to the perfect gas results.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.858012
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