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Next: The Limitations of the Up: Normal Shock Previous: Prandtl's Condition Index Operating Equations and AnalysisIn Figure (5.3), the Mach number after the shock, M_{y}, and the ratio of the total pressure, P_{0y}/P_{0x}, are plotted as a function of the entrance Mach number. The working equations were presented earlier. Note that the has a minimum value which depends on the specific heat ratio. It can be noticed that the density ratio (velocity ratio) also has a finite value regardless of the upstream Mach number. The typical situations in which these equations can be used also include the moving shocks. The equations should be used with the Mach number (upstream or downstream) for a given pressure ratio or density ratio (velocity ratio). This kind of equations requires examining Table (5.1) for or utilizing Potto-GDC for for value of the specific heat ratio. Finding the Mach number for a pressure ratio of 8.30879 and k=1.32 and is only a few mouse clicks away from the following table. This table was generated by Potto-GDC (in HTML)
Solution
Subsections Next: The Limitations of the Up: Normal Shock Previous: Prandtl's Condition Index Created by:Genick Bar-Meir, Ph.D. On: 2007-11-21 |