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Aeronautical Facilities Assessing the National Plan for Aeronautical Ground Test Facilities (1994) / Chapter Skim
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4 Propulsion Facilities
Pages 31-36

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From page 31...
... Two of the new-generation large high-bypass engines for the Boeing 777 aircraft are being altitude tested at Arnold Engineering Development Center to avoid the capital investment required to upgrade industry owned facilities.
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From page 32...
... is the key to developing improved air breathing engines for both military and commercial applications. Figure 4- ~ shows the relationship between specific core engine gas power and Aeronautical Facilities: Assessing the National Plan turbine rotor inlet temperature, illustrating that improved performance is indeed possible.
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From page 33...
... 33 Subsonic Commercial and Military Transport Engine Development The 'final frontier" in conventional subsonic propulsion is represented by the cross-hatched region in Figure 4-2. Industry is developing three basic types of engines to reach this goal for commercial passenger, heavy cargo, and military transport applications: · high bypass ratio (five to nine)
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From page 34...
... At constant core engine power, fan bypass pressure ratios are reduced to accommodate high engine bypass ratios, and this lowers the velocity of the jet exhaust. For subsonic flight, Tower jet velocity is desirable, because it reduces jet noise and improves propulsive efficiency, which decreases specific fuel consumption (SFC)
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From page 35...
... PROPULSION FACILITY REQUIREMENTS Figure 4-3 shows that the current Aeropropulsion System Test Facility at Arnold Engineering Development Center is adequate for altitude testing of the newest generation of high-bypass engines, such as the PW4084 and GE90. However, a 40 percent increase in flow capacity might be required to handle the next generation of ultra-high-bypass, gear-driven propuIsor engines such as the PW4000 Advanced Ducted PropuIsor (ADP)
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From page 36...
... 1992. Future Aerospace Ground Test Facility Requirements for the Arnold Engineering Development Center.
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Key Terms

  • air flow
  • core engine
  • test facilities
  • arnold engineering
  • engineering development

  • air breathing
  • wind tunnels
  • breathing engines
  • engine test
  • bypass ratio

  • ground test
  • pressure ratios
  • engine bypass
  • speed civil
  • specific core

  • propulsion wind
  • facility requirements
  • ducted propulsor
  • supersonic cruise
  • thrust reverse

  • advanced ducted
  • core engines
  • fan bypass
  • bypass engines
  • propulsive efficiency

  • propulsion facilities
  • core power
  • test requirements
  • gas power
  • turbine temperatures


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