Tuesday, May 19, 2015

Hot Supersonic Jet

Do you ever wonder how hot a supersonic jet would become if it flew at sea-level at 3.5 the speed of sound (Mach 3.5)?  Well, put your thoughts to rest.  Here is the answer:

Step 1.  Grab a CAD file from the Sketchup 3D warehouse.  A great one is the SR-71 model.

Step 2.  Convert it to .stl format and read it into Stallion 3D.

Step 3.  Have Stallion 3D solve the Navier-Stokes equations at Mach 3.5 (1,200 meters/second).

Step 4.  Walk away for 3 hours (if you are using a 2 GHz laptop and 500 k cells) and return to find the "answer".

The surface pressure in Pascals:

 Pressure on the surface of the jet as rendered in Stallion 3D with HIST.

The Hanley Discretization (HD) technologies accurately solves
the complete flow field and displays surface Cp (near the fuselage) within a 
few hours using Windows XP, 7 or 8/8.1

The Mach Number:

Stallion 3D applies a no-slip velocity condition to
the surface for this particular problem.  The 
program can also solve the compressible Euler equations.

The temperature:

Yes. It gets hot on the surface of a supersonic jet flying at sea-level as speed more than the speed of sound. The temperature can become as hot as 770 degrees Celsius on the surface.

Surface temperature in degrees Kelvin

Temperature on wing section near the fuselage of the jet.

Stallion 3D with Hanley Innovations Surface Treatment (HIST) along with Hanley Discretization  (HD) solves difficult problem once only tractable with countless days of grid generation and super-computing time.  And guess what?  It solves them in just a few hours on ordinary laptops and tablets computers.

More information about Stallion 3D can be found at http://www.hanleyinnovations.com.  Please call me at (352) 240-3658 to further the discussion.

Thanks for reading.