j_02 |
September 2, 2014 23:52 |
I am not sure if this is what you are looking for. However, I have done a problem that involved generating a nozzle shape. It simplified the geometry by representing the curves as sinusoidal.
Perhaps you can generate the outline of the nozzle boundary by dividing it into 6 curves (or I guess just 4 as the converging and diverging sections are to be reflected). One curve represents the inlet and a second curve represents the outlet. These are obviously described by vertical lines (for which you may find the height using area ratios and the throat diameter).
The third curve is for the converging portion. Assuming the horizontal axis ( ) divides the nozzle, the third curve is of the form
where represents the vertical difference between the top of the inlet and the top of the throat, represents the horizontal location of the throat, and represents the horizontal location of the inlet. Reflect this across the axis for the fourth curve.
The fifth curve describes the diverging section. The curve may be represented the same way:
where represents the vertical difference between the top of the outlet and the top of the throat and represents the horizontal location of the outlet. Reflect this across the axis for the sixth curve.
Maybe you can shift the curves in order to satisfy your converging and diverging angle criteria. Good luck.
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