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 55 3.10 Stator & Stator Housing The stator housing was designed to be machined from 316 stainless steel bar stock. The primary purpose of the housing is to hold the stator in place and allow the turbine to rotate at full speed while maintaining the high tolerance necessary for efficiency. We designed a simple geometry which includes a simple thin walled hollow cylinder with a flange on either end. The flanges provide surfaces where the combustion chamber and exhaust nozzle can be attached. On the combustion side, the flange was designed to be welded to the combustion chamber while the nozzle could be attached with bolts feeding through small tabs on the nozzle and into the housing. The stator was machined in the same fashion as the turbine. Once, we machined the stator as a bladed disk, we then installed the disk into the stator housing and welded the blades to the outer walls. The stator housing was machined using 35° and 55° ferrous inserts and a ferrous boring bar to bore out the inner diameter. We then drilled holes on the sides of the housing evenly so that the holes would line up with the blades in order to plug weld the stator inside of the housing. We machined a small lip so that the stator could sit inside of the housing before it was plug welded. The completed stator and stator housing assembly can be seen in Figure 21.

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