Contact Us
Development of an Additive Manufactured Micro Gas Turbine

Development of an Additive Manufactured Micro Gas Turbine

Wednesday 08/03/2023
  • Lukas Badum
  • The work is towards PhD degree under the supervision of Assoc. Prof. Beni Cukurel
  • Classroom 165, ground floor, Library, Aerospace Eng.
  • click here
  • Department of Aerospace Engineering
  • Technion – Israel Institute of Technology
  • The talk will be given in English

Ultra micro gas turbines for electric power generation below 1 kW are a viable replacement technology for lithium batteries in drones due to their high energy density. To achieve high aerodynamic efficiency, turbomachinery at centimeter scale and speeds up to 500,000 rpm are required. Previous research showed that small-scale effects disqualify design practices applied to larger gas turbines where subcomponents can be optimized isolated from system design. To appropriately capture component interdependencies of ultra micro gas turbines, an integrated design approach based on reduced order models is expedient. Therefore, a comprehensive engine design model including thermodynamic cycle analysis, compressor and turbine aerodynamic design, combustor design and high-speed generator design is presented. The design system is adapted to capture additive manufacturing constraints of small-scale components. In addition, reduced order models for rotordynamics, stress analysis and heat transfer are used to define the permissible design space.

To validate the established set of reduced order models, extensive experimental investigations have been performed. The applicability of additive manufacturing to micro gas turbines was investigated by performance comparison of two rotors manufactured with lithographic ceramic manufacturing (LCM) and selective laser sintering (SLS). To this end, compressor performance maps were recorded at speeds up to 450,000 rpm, showing significant performance benefit for the LCM processed rotor and good agreement with the reduced order model. Additionally, porous media combustion performance was measured, showing low achievable equivalence ratios but considerable radiation heat losses. Furthermore, a high-speed generator was developed and tested validating the reduced order modelling approach. Finally, system performance testing is currently on-going on a preliminary micro turbine prototype integrating generator, turbomachinery and combustor.

Light refreshments will be served before the lecture
For more info
Please fill in the details

"*" indicates required fields

This field is for validation purposes and should be left unchanged.
*required fields are marked with an asterisk