This week, multidisciplinary partners GE Research, Oak Ridge National Laboratory (ORNL), and PARC, a Xerox company, were awarded a $1.3 million project to more than double the speed of the design and validation process for high-performance 3D printed turbomachinery components. If the speed can be increased by up to 65%, it could revolutionize turbomachinery product design, as 3D printing would be faster than many conventional manufacturing processes.
“It not only could help expand the broader application of additive; it also could lead to improved design of turbomachinery parts that deliver cleaner, more efficient energy solutions,” Todd Alhart, Media Relations Executive with GE Research, told 3DPrint.com.
The award was granted through DIFFERENTIATE (Design Intelligence Fostering Formidable Energy Reduction (and) Enabling Novel Totally Impactful Advanced Technology Enhancements), a program by the Advanced Research Projects Agency (ARPA-E), which GE Research has worked with before.
It takes many people, who are experts in fluid, structural, and thermal properties, to design new components for complex power products, like gas and wind turbines and jet engines. And while 3D printing itself can save time on production, a lot of time and effort are put into initially validating a part for 3D printing in these types of industries. You have to consider its aerodynamic performance, how the material responds to stresses and heat, how the design can impact the airflow, etc.
All of this work can take between two and five years to complete. But, this collaborative research team thinks they can cut this time by over half, down to 1-2 years – making it faster than traditional casting processes.
“One of the keys to enabling the widespread use and benefits of 3D printing is the reduction of the time it takes to create and validate defect-free 3D component designs,” explained Brent Brunell, leader of GE Research’s Additive efforts. “Using multi-physics enabled tools and AI, we think we can beat the timeline for some traditional manufacturing processes by automating the entire process.”
He went on to say that “the optimization of structural characteristics has already been automated,” which has not yet been completed for the fluid and thermal properties of a part. GE and PARC researchers are now working to achieve this, using AI tools to generate surrogate models automatically from additive producibility data and “seamlessly integrate it with multi-physics design optimization techniques.”
The team will work together to create AI and machine learning (ML) technologies that will allow for millions of different design iterations in a much faster timeframe.
“The combination of model-based and data-driven AI to accelerate generative design is a key innovation that will dramatically reduce the time to synthesize and fabricate quality parts,” stated Saigopal Nelaturi, the Manager of Computation for Automation in Systems Engineering for the System Sciences Lab at PARC.
“Surrogate models (built using machine learning) that encapsulate complex couplings between process physics and part quality will help guide the optimization models in feasible regions of very high dimensional design spaces. This combination of AI techniques enables automatic multi-functional part synthesis to meet real-world application demands, for which AM can provide truly novel solutions.”
The researchers will be using the Summit supercomputer at ORNL’s Computing Facility to fabricate precise, AI-based surrogate models. ORNL’s High Flux Isotope Reactor will also be put to work during this project, as a way to analyze 3D printed turbomachinery components and generate the necessary data to train, and later evaluate, these models.
John Turner, the Computational Engineering Program Director at ORNL, said, “This is the type of project that leverages the unique capabilities at ORNL – experimental and computational facilities – as well as expertise in computational science and additive manufacturing.”
The end result will be a high-performance, defect-free 3D printed multifunctional design that can stand up well under high temperatures and stresses, and perform better than parts made with conventional casting methods.
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