Aircraft Electrified Propulsion Systems and Component Design 21 August 2019 0800 - 1700 JW Marriott, Indianapolis, Indiana

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Registration Options:
  • Conference Rate: $450
  • Early Member Rate: $350
  • Standard Member Rate: $400

Synopsis

Prior to the AIAA/IEEE Electric Aircraft Technologies Symposium (EATS), this eight-hour course will focus on the major components of electrified propulsion systems, which include batteries, thermal engines, generators, feeders, power electronics, motors, propulsion fans, propellers, cooling pumps and fans, cooling plumbing and ducting, heat pumps, and heat exchangers. Participants will learn component theory of operation and design considerations, methods for modeling or estimating component weight and performance, and approaches for system steady-state and dynamic performance analysis. To provide context, electrified aircraft and electrified propulsion architectures will be reviewed and potential benefits will be discussed, before the underlying component technologies are covered in detail.

Methods of creating mechanical thrust from gas turbine engines, fans, and propellers naturally lead to consideration of fuel sources and their relative energy content. Significant attention is paid to the electric machines (motors and generators) and the electronic power converters that are used to supplement and complement the mechanical systems. Examples will be drawn from the current literature to illustrate design trade-offs and performance barriers. 

Key Topics

  • Understand the electric and hybrid aircraft and propulsion system architecture design space and the potential benefits and disadvantages associated with the architectures in this design space
  • Become familiar with historical and recent electric and hybrid-electric aircraft system studies
  • Understand the theory of operation, design considerations, and weight and performance modeling approaches for the following electrified propulsion drivetrain components 
    • Prime movers, such as gas turbines and other engines 
    • Mechanical propulsion technologies such as propellers and fans
    • Electrical machines
    • Electronic power converters
  • Develop an understanding of how electronic power converters and electric machines are controlled
  • Learn how to develop dynamic models for drivetrain components
  • Learn how to develop system models and predict system weight and performance 

Who Should Attend

This course is intended for engineers with a background in aerospace, heat transfer, thermodynamics, and electrical engineering that are interested in learning about the unique design considerations for electric and hybrid-electric propulsion systems.

Outline
  • Hybrid Propulsion System Architectures
    • Battery Electric (not a hybrid)
    • Parallel
    • Series
    • Partial Series
  • Energy Sources
    • Fuel
    • Grid
    • Well-to-wake energy
  • Metrics
    • Fuel consumption, energy
    • Emissions (noise, NOx, CO2)
    • Maintenance/lifing
    • Energy cost, DOC
  • Prime Movers/Energy Sources
    • Conventional GT 101
      • Thrusting engine
      • Shaft power production (power off takes and turboshafts)
      • Sizing and performance modeling
    • Other fuel burning IC engines for producing shaft power
      • Types
      • Sizing and performance modeling
    • Fuel Cells
      • Types
      • Sizing and performance modeling
  • Providing Mechanical Thrust — Propulsors
    • Ducted fan
    • Propeller
    • Mechanical conversion — shafts and gearboxes
  • Electric Drivetrain Components
    • Electric machines (motors and generators)
      • Fundamentals
      • Electromagnetic forces and torques
      • Conditions for average power conversion
      • Design of electric machines
    • Electronic power converters
      • Fundamentals
      • Dc/dc conversion
      • Dc/ac inversion
      • Galvanic isolation
    • Control of power converters and electric machines
      • Direct circuit averaging
      • State-space modeling
      • Sampled-data modeling
      • Field-oriented control
      • Direct torque control
    • Simulation of electric drivetrain components
      • High fidelity models
      • Behavioral models
      • Sampled-data modeling
  • Thermal Management System Design and Performance
    • Heat acquisition — component cooling technologies and approaches; heat pumping systems
    • Heat transport — pumps, fans, ducts and pipes
    • Heat rejection — heat exchangers, phase change materials, skin coolers
Materials
Course notes will be made available about one week prior to the course event. You will receive an email with detailed instructions on how to access your course notes. Since course notes will not be distributed on site, AIAA and your course instructor highly recommend that you bring your computer with the course notes already downloaded to the course. 
Instructors

Charles Lents , associate director at the United Technologies Research Center (UTRC), has 30 years of experience in the conceptual design of integrated aircraft primary and secondary power and thermal management systems. At UTRC, Chuck led a team in the development of an integrated modeling environment for the study of integrated total aircraft power systems and their impact on air vehicle performance. He has led several studies investigating power and thermal management solutions for a range of commercial and military vehicles, and is the project lead for UTRC’s Innovative Propulsion project, studying and developing high altitude and alternative small engine propulsion systems. He currently leads UTRC’s NASA-funded Parallel Hybrid Propulsion System Technology Development program. He has experience in a diverse set of technical areas, including thermodynamics, fluid dynamics, turbomachinery, heat transfer, power electronics cooling, systems integration and aircraft secondary power systems, reliability, risk/uncertainty analysis and life-cycle cost modeling. Chuck received his B.S.M.E from the University of Illinois in 1982 and his M.S.M.E. from Purdue University in 1984.

David Torrey bis a senior principal engineer in the Electric Power organization at GE Global Research. His research interests are in the design and control of electric machines, particularly within the context of integrated energy conversion systems. His application experience ranges from machine design for subsea hydrocarbon pumping and electric submersible pumps, to design of next-generation generators for offshore wind turbines, to design of engine-embedded generators to support hybrid-electric aircraft. He holds 14 awarded patents and 18 pending in the electric machine, power electronics, and control fields related to applications in transportation, renewable energy, oil and gas, and microgrids. He has authored over 40 journal papers, over 70 conference papers, 3 book chapters, and one textbook in these areas. He supervised 13 doctoral theses while on the faculty at Rensselaer Polytechnic Institute. David has a B.S. degree from Worcester Polytechnic Institute, and S.M., E.E., and Ph.D. degrees from MIT, all in electrical engineering. He is a fellow of IEEE and IET.