b'Power & Energy | Engineer InnovationCooler StatorBlower RotarFigure 2: Design process cooling concept Figure 3: SGen-3000 W series CAD section viewFigure 4 a, b: Computational meshconcept of turbo generators. Hehighly complex Siemens NX CAD possesses a wealth of knowledge andmodel from Siemens Teamcenter and experience in the design and realizationto review the total amount of of generators and gas turbines andmanpower that was to be invested to explains: A lot of optimization weprepare, set up and finally analyze such thought about cannot be done becausea complex CAD model. One of the the effort exceeds the benefits. objectives was to investigate the global pressure and flow distribution within Typical rotors have a diameter of aboutthe complete model, including the 1.2 meters (m), while the stator lengthrotor, the heat exchanger as well as all is 5 m with a power output of up to 850small cooling channels. As the Megavolt Amperes (MVA). The smallestgeometry will also be used for gap design for the cooling circuit in themanufacturing, it is one of the most rotor is 2 millimeters (mm) and 5 mm inintricate models as it includes a few the stator, resulting in a geometricalthousand parts with no simplifications. ratio of 2:5000, which can be problematic for simulations.Naturally, unused and unnecessary components were disabled for the In an effort to improve the simulationsimulation. One of the objectives of this process, Dr. Jkel was introduced tosoftware stress-test was to investigate Simcenter FLOEFD software. Thethe required total efforts to run such an first test was to import a full native,extraordinarily complex model. 13'