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Homework Help: HGL and EGL at gradual contract region

  1. May 4, 2016 #1
    1. The problem statement, all variables and given/known data
    in the two notes , the shape of graph at the gradual contraction region is are different , which is correct ? the first one ? or the second one ?
    in the first picture , we can see that the gradient of graph of HGL is increasing downwards , whereas in the second photo , the gradient of HGL is decreasing downwards? in the second picture , the shape of EGL at gradual contaction region is also different with the first one ? which is correct ?
    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

    • 175.PNG
      File size:
      25.7 KB
    • 176.PNG
      File size:
      135.6 KB
  2. jcsd
  3. May 4, 2016 #2
    anyone can comment which one is correct ?
  4. May 4, 2016 #3
    i have another example here , in this example we can see that the shape of HGL at nozzle is different with the one in 176 , so which shape is correct ?.

    Attached Files:

    • 177.PNG
      File size:
      98.7 KB
  5. May 5, 2016 #4
    or the shape of graph is not important here ? as long as the EGL drop and velocity increse , both graph are correct ?
  6. May 5, 2016 #5
    anyone know to answer ?
  7. May 7, 2016 #6
  8. May 14, 2016 #7
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