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Next: The Practical Questions and Up: Entrance Mach number, M1, Previous: Entrance Mach number, M1, Index The maximum location of the shockThe main point in this discussion however, is to find the furthest shock location downstream. Figure (9.16) shows the possible as function of retreat of the location of the shock wave from the maximum location. When the entrance Mach number is infinity, , if the shock location is at the maximum length, then shock at results in .The proposed procedure is based on Figure (9.16).
From numerical point of view, the Mach number equal infinity when left side assumes result in infinity length of possible extra (the whole flow in the tube is subsonic). To overcome this numerical problem it is suggested to start the calculation from distance from the right hand side. Let denote Note that is smaller than . The requirement that has to be satisfied is that denote as difference between the maximum possible of length in which the supersonic flow is achieved and the actual length in which the flow is supersonic see Figure (9.15). The retreating length is expressed as subsonic but Figure (9.17) shows the entrance Mach number, reduces after the maximum length is exceeded.
Next: The Practical Questions and Up: Entrance Mach number, M1, Previous: Entrance Mach number, M1, Index Created by:Genick Bar-Meir, Ph.D. On: 2007-11-21 |