Commercial vortex tubes are constructed from 6 parts. Here we have produced the tube and its end valves as single parts.
The AM vortex tube was designed so that the vortex generating airflow channels were built without build supports in the AM part as these would not be removable after construction.
By altering internal channel shapes to suit the AM process internal build supports can be avoided. Designs created for subtractive processes with many right angles that suit milling create the requirement for build supports in the AM process.
Altering the design by creating angled transitions rather than sharp 45 degree turns allows a design to be built without additional build supports.