I am modeling a Radial Aerospike Engine with 6 nozzles. The solid fuel grain is housed in a 75 mm outer diameter motor casing, which has a smooth contour down to the small Converging-Diverging Nozzle. I am attempting to add cooling channels into the contour walls. The channels have diameter of 2 mm and are spaced evenly.
My method has been created a sketch above the contour itself, then extruding down into the contour as a new body. This allows me to split the bodies, so just the interesting body is saved, and the top and bottom of the extrusion are deleted. Leaving behind a 2 mm thick rectangle along the complex curve of the contour. I use offset face to bring the rectangle line into the contour 0.5 mm. Then, by placing 2 mm circles around the face that connects to the motor casings, I do a sweep going along the rectangle curve on the contour. This has worked for so far for 8 of the cooling channels (on one nozzle), but the four channels that go in between the working ones are failing to complete the sweep
Another challenge I am coming across is creating the turning in the channels by the throat of the nozzles. The channels are in sets of two, one inlet hole and one outlet. So, the fluid can go into the channels, turn around at the nozzle throat, then come back out the contour. When I ty to sweep this turn around section, the sweep is unable to be completed. The error says to decrease the taper angle, although it is already at 0 deg. I believe my turn around section is too sharp for the sweep function.
Is there a better way to model these cooling channels? Or is there a simple fix to the issue I am currently having?
