16.50  Intro to Propulsion Systems

I have been asked to remind you that while you are allowed to collaborate on problem sets, it is critical that your solutions be written up independently and that you indicate who you worked with.

 

Hello all,

An error inadvertently crept into the online version of the solutions. The correct way to solve this part of the problem is:

h_e/L_e = tan(mu);

mu=arcsin(1/M_e) = angle the last mach wave of the Prandtl-Meyer expansion fan makes with the local flow direction (in our case, the horizontal or parallel to the end of the spike). Remember, in an aerospike nozzle, the last expansion wave impinges on the end of the spike.

 

This gives mu= 19.47 deg

L_e=16.40 cm.

Sorry about that.

-Pranay.

Thursday 5-6pm in 37-362