My logic vs. Calculated Results: Plots of Thrust, RPM, Spillage

  • Thread starter roldy
  • Start date
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I finally figured out what my previous problem was in my last question posted. I have obtained the plots required but I am a little confused about the trends.

(1) At low Mach, should my thrust be lower compared to the value at a higher Mach?
(2) Should the RPM decrease with an increase in Mach?
(3) Should spillage decrease with an increase in Mach?

I've attached plots of what I obtained. Each plot as 8 curves for different fuel flow rates ranging from .1 to .7 and also the on-design point fuel flow rate of .2506 kg/s.

My logic

(1) I would think that an increase in Mach would decrease thrust because the mass capture of air would decrease.
(2) Following from the statement above would result in an increase of RPM with an increase in Mach.
(3) Spillage would increase due to the mass capture of air decreasing.

Could someone help me out with this logic?
 

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