Hypersonic flow | Wikipedia audio article
Channel: wikipedia tts
Date: 04/06/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Hypersonic_speed


00:00:43 1 Characteristics of flow
00:01:41 1.1 Small shock stand-off distance
00:02:14 1.2 Entropy layer
00:02:37 1.3 Viscous interaction
00:03:33 1.4 High-temperature flow
00:04:02 2 Classification of Mach regimes
00:05:51 3 Similarity parameters
00:08:44 4 Regimes
00:09:08 4.1 Perfect gas
00:09:46 4.2 Two-temperature ideal gas
00:10:20 4.3 Dissociated gas
00:11:15 4.4 Ionized gas
00:11:56 4.5 Radiation-dominated regime
00:12:52 5 See also



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SUMMARY
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In aerodynamics, a hypersonic speed is one that greatly exceeds the speed of sound, often stated as starting at speeds of Mach 5 and above.The precise Mach number at which a craft can be said to be flying at hypersonic speed varies, since individual physical changes in the airflow (like molecular dissociation and ionization) occur at different speeds; these effects collectively become important around Mach 5-10. The hypersonic regime is often alternatively defined as speeds where Cp and Cv are no longer able to be reasonably considered constant.