I created a new simulation project called 'FEA of Supersonic Rectangular Intake':
The project involves investigation of deformation and stresses in a supersonic intake due to pressure variations.
The primary function of a ram-intake is to reduce the Mach number on the inlet of propulsion systems thus increasing the pressure of the flow to reach the compressor. For this investigation, a rectangular lip intake design is considered, which can be seen on several fighter aircraft. (to reduce pressure losses)
for this example a pressure ratio of 2.5 is considered (Ma 1.5) and the tunnel pressure (towards compressor) is chosen to be 5 atm.
Inlet to the compressor is fixed, whereas other parts are free to move (as seen in F-16 or F-22), The other case investigated is when the 2 edges are fixed (as seen on F-15)
FEM analysis is important for such platforms as it gives designer an idea about the deformation and stress in structure every time the aircraft operates in such regime.
More of my public projects can be found here.