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Engineering LibreTexts The Star Conditions

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  • The speed of sound at the critical condition can also be a good reference velocity. The speed of sound at that velocity is

    \[ c^{*} = \sqrt{k\,R\,T^{*}}

    In the same manner, an additional Mach number can be defined as

    \[ M^{*} = \dfrac{U }{ c^{*}}

    Contributors and Attributions

    • Dr. Genick Bar-Meir. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or later or Potto license.