
Exp Data:

   model incidence of 5 degrees:
      diffuser_cp_T638_aoa5.dat       - x vs. cp data from Test 638 for AoA=5 (F6 no horn)     
      diffuser_cp_T640_aoa5.dat       - x vs. cp data from Test 640 for AoA=5 (F6 with horn)
      diffuser_cp_bestfit_aoa5.dat    - best fit curve for AoA=5, with 95% bounds
   model incidence of -2.5 degrees:
      diffuser_cp_T638_aoam2p5.dat    - x vs. cp data from Test 638 for AoA=-2.5 (F6 no horn) 
      diffuser_cp_T640_aoam2p5.dat    - x vs. cp data from Test 640 for AoA=-2.5 (F6 with horn)
      diffuser_cp_bestfit_aoam2p5.dat - best fit curve for AoA=-2.5, with 95% bounds 

Plots:

diffuser_cp_aoa5.jpg                      - diffuser x vs. Cp, AoA=5 deg
DiffuserPressures_5deg.jpg                - similar plot, with additional details
DiffuserPressursResiduals_5deg.jpg        - differences between curve fit and the data points for 5 deg
diffuser_cp_aoam2p5.jpg                   - diffuser x vs. Cp, AoA=-2.5 deg
DiffuserPressures_minus2.5deg.jpg         - similar plot, with additional details
DiffuserPressursResiduals_minus2.5deg.jpg - differences between curve fit and the data points for -2.5 deg


Tecplot layout files:

diffuser_cp_aoa5.lay                      - layout file to create diffuser_cp_aoa5.jpg
diffuser_cp_aoam2p5.lay                   - layout file to create diffuser_cp_aoam2p5.jpg


Photos:  diffuser_photos.pdf


Notes:

1. The pressure rail was installed in the diffuser (near the center of the floor) between approximately
   x=125 and 175.  Tunnel x location is given here in feet.  It represents the distance from the 
   start (x=0) of the test section.  The end of the test section and start of the diffuser is at around 
   x=50 feet.

2. There are tunnel flaps located in the diffuser, at approximately x=115 feet.  They can be opened during a 
   run to help cool the tunnel.  For the JF test, the flaps were closed.  However, even when these flaps are 
   "closed" there is always some flow coming through them into the tunnel.  Because the diffuser pressure 
   rail was located downstream of the flaps, it is possible that there may have been some effect of
   residual flow through the tunnel flaps on the measured pressures (compared with perfectly sealed walls).

