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Design and Manufacturing of a Miniature Turbojet Engine

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Design and Manufacturing of a Miniature Turbojet Engine ( design-and-manufacturing-miniature-turbojet-engine )

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DESIGN OF MINIATURE TURBOJET ENGINE 40 After considering the use of a Coordinate Measuring Machine (CMM) as well as an Optical Comparator, we determined the best course of action was to obtain a 3D scan of the compressor. We reached out to a company in Windsor, Connecticut called Capture 3D, their staff donated their time, equipment, and expertise to generate a stereolithographic (STL) file of our compressor wheel. We then imported this STL file into SolidWorks. In order to design the inlet shroud to match the curvature of the rotating compressor profile, we drew concentric circles around the fins of the compressor and connected them with a spline. Rotating this spline around a centerline generated a surface matching the compressor profile. By offsetting this surface, we were able to design an inlet shroud that is within the acceptable tolerance. The shroud was machined from a six-inch bar stock of 6061 t651 aluminum and was turned on a Computer Numerical Control (CNC) lathe in the Worcester Polytechnic Institute (WPI) Washburn Shops. A total of sixteen bolt holes were drilled around the perimeter of the shroud in order to facilitate assembly. The completed inlet shroud can be seen below in Figure 11.

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