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Improving the Efficiency of Engines for Large Nonfighter Aircraft (2007) / Chapter Skim
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8 Technology Preparedness and Insertion
Pages 96-105

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From page 96...
... efforts to recognize this trend and place greater emphasis on the continual transition of new technology to fielded engines, in particular, technology that can reduce fuel consumption. The former Engine Model Derivative Program (EMDP)
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From page 97...
... The breadth of this integrated team allows the VAATE program to coordinate gas turbine technology development strategy at the national level while leveraging funding of the constituent organizations. A fundamental goal of VAATE is to advance overall air system capability with a capability-focused investment strategy.
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From page 98...
... Recommendation 8-1. The Air Force should review and amend the VAATE plan and its engine development programs, as appropnate, to provide an explicit emphasis on technology to improve fuel efficiency and reduce operational costs, to transition those improvements to fielded, highbypass-raho engines, and to consider research aimed at the reduction of particulate, hydrocarbon, sulfur, carbon monoxide (CO)
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From page 99...
... 70% (0.8Mn/40Kft) - 3-D Aerodynamics - Active Flow Control 60% - Cooled Cooling Air/TMS - Multi-Walled Cooling Fuel Efficiency - Ceramics and Intermetallics VAATE VAATE - Transonic Aero 50% +15% - Convection & Film Cooling - Single Crystal SOA SOA - Dual Spool IHPTET - Variable Geometry - Convection Cooled 40% - DS Eutectic 38% of the way to - Subsonic Aero Stoichiometric Limit - Single Spool - Uncooled 30% 20% 1940 1950 1960 1970 1980 1990 2000 2010 2020 2030 2040 Year Basic Engine Performance Improvements Combined with Integration Technologies Will Result in a 25% Increase in Fuel Efficiency FIGURE 8-2 Progress in gas turbine thermodynamic cycle fuel efficiency.
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From page 100...
... COMPONENT IMPROVEMENT AND ENGINE MODEL DERIVATIVE PROGRAMS This section discusses the issues and opportunities associated with a large and growing portion of the DoD aircraft propulsion systems. Figure 8-3 shows that approximately $4.2 billion per year of the total $6.6 billion DoD yearly gas turbine engine budget is spent on the sustainment of existing engines (AFRL, 2005)
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From page 101...
... The first gap is the inability to conduct timely studies of propulsion system enhancement or to develop technology transition roadmaps to support and complement aircraft modernization and capability growth studies prior to acquisition Milestone A The second gap is the lack of a propulsion technology demonstration process to mature technology from Technology Readiness Level (TRL)
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From page 102...
... SOURCE: Personal communication between Mark Amos, Agile Combat Support Wing, Wright-Patterson to Satisfy Payload/Aero Performance Requirements Air Force Base, and NRC staff member Carter Ford on July 7, 2006. 8-4 generate quantitative propulsion system requirements until the weapon system enters systems design and development.
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From page 103...
... TURBINE ENGINE SCIENCE AND TECHNOLOGY FUNDING Gas turbine engines will continue to be the predominant military propulsion source for the foreseeable future. To maintain air supenonty, it is cnbcal for the United States to maintain technological supenonty in gas turbines.
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From page 104...
... . shown in Figure 8-6, owing to the near elimination of the NASA and ManTech programs and reduced funding for the VAATE program, the funding available in the United States for the development of gas turbine technology is approximately one-third of the funding that produced the technology for the Fl 19, F135, and GE90 engine families.
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From page 105...
... Dave Irwin, Pmpulsion Systems Squadron Development Engines, Wright-Patterson Air Force Base, "Engine model derivative program," Presentation to the committee on June 15, 2006.
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Key Terms

  • fuel efficiency
  • gas turbine
  • engine technology
  • turbine engines
  • vaate program

  • fuel consumption
  • model derivative
  • engine model
  • propulsion capability
  • derivative program

  • component improvement
  • turbine technology
  • engine fuel
  • engine science
  • engine performance

  • fuel burn
  • technology transition
  • derivative engines
  • percent improvement
  • advanced technologies

  • fielded engines
  • baseline engine
  • engine capability
  • specific fuel
  • gas turbines

  • vaate plan
  • existing engines
  • technology funding
  • technology investment
  • agile combat


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