fluidic thrust vectoring nozzle science fair project

[badpilot27]

So I was wondering how the x36 went about yaw thrust vectoring and I'm not totally sure but I think it does it with fluidic methods. About the same time, I had to choose a project for the school science fair in my science class so I figured this would be a good excuse to test some of these nozzles.

I did some research and apparently there are only two methods of fluidic thrust vectoring that I've seen which don't need a supersonic exhaust speed to work well at and since i don't have a jet engine I decided to only test those two methods.

link to a simple paper with a lot of the fluidic thrust vectoring configurations
the two configurations I chose to test were the "co-flow" (CF) and "throat skewing" (TS) configurations and I used square nozzle geometries

top view of the nozzles I designed

The grey and blue flaps are servo actuated
I recently tested the TS nozzle when I was setting it up and I found it able to slightly angle the thrust vector but defiantly less then the 20 degrees I thought It would be able to vector. I'm not really sure why but I think its at least due to lack of injection pressure and how I did absolutely zero CFD on the nozzles.

haven't tried out the CF nozzle yet but I think it will do far better.

I'm curious to see what you guys think of this project.

 

[badpilot27]

small ammount of data i got this afternoon

 

[Mr Man]

Cool project!

 

[badpilot27]

might have designed the nozzle a tad bit too long

TS nozzle shown here

 

[badpilot27]

after testing the TS nozzle, every test point resulted in a negative ammount of thrust oriented in the correct decision.

i think its prob because the nozzle tip injection point has little injection pressure compared to the throat injection point causing the vector direction to reverse

I would really appreciate some feed back if anyone has any.

 

[badpilot27]

almost done with collecting data