HybVer
Significant reductions in emissions and increases in efficiency are hardly possible by optimising conventional aero-engine components. Disruptive approaches for new propulsion systems are therefore necessary. The use of electrical energy promises high drive system efficiency; however, the existing disadvantages of electric components in terms of power-to-weight ratio and energy storage capacity have prevented a purely electric propulsion system for relevant air transport applications so far. This circumstance necessitates a synergetic integration of electric and advanced conventional technologies, i.e. hybrid aero-engines (see Figure 1).
The joint project ‘Hybridised Compressor Concepts’ (German: Hybridisierte Verdichterkonzepte – “HybVer”) is pursuing a technical approach in which individual compressor rotor rows, stages, or stage compounds of the engine are driven electrically and can, therefore, operate independently of the gas turbines (see Figure 2). The joint partners Bauhaus Luftfahrt e.V., TU Berlin (Chair or Aero Engines), TU München (Institute of Turbomachinery and Flight Propulsion) and BTU (Chair of Power Electronics and Propulsion Systems) are working together on the holistic development and integrated evaluation of turbo compressor concepts with partial electric drive.
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The project's central objective is to achieve technology readiness level (TRL) 2 and to evaluate the developed technology concept in terms of flight performance and emission characteristics for aircraft types with particular application potential for hybrid-electric propulsion systems. Questions for hybridised compressor concepts in aerodynamics and operating behaviour, electrical system components, compressor design and mechanical design, and the overall conceptual integration at the propulsion system and aircraft levels are answered. Central development requirements for key technological elements are identified based on the knowledge gained and characterised for further research and development activities as part of a technology development plan for a potential entry into service in 2035.
The Institute of Turbomachinery and Flight Propulsion is researching innovative construction methods for electrically driven multi-stage compressors with stage-specific power drives as part of the project. The aim is to create fast, constructive pre-design methods and processes. With this methodology, TUM is contributing to methodical design processes and developing an evaluation capability for compressors of this type.
Aim/Objective
- The aim of the project is the holistic development and integrated evaluation of compressor concepts with a partial electric drive, considering aerodynamics, operating behaviour, electrical system components, compressor design, mechanical design and overall conceptual integration at the drive system and aircraft level.
- The LTF develops design concepts for hybrid compressors with stage-individualised drive and creates new preliminary design methods that enable a fast and robust preliminary design of hybrid compressors.
