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2005-2006 Assessment of the Army Research Laboratory (2007) / Chapter Skim
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6 Vehicle Technology Directorate
Pages 43-48

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From page 43...
... These moves indicate that the NASA aeronautics program will be operating with further budget reductions. The BRAC announcement provided the VTD with the opportunity to conduct an introspective review of its activities and to conduct an ongoing strategic planning exercise to seek the best approach to addressing its mission and how it may best be accomplished without the four divisions being collocated in their entirety with NASA at the two NASA centers.
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From page 44...
... Engines operating in these conditions experience erosion of compressor blades and deposition of material on the turbine components, resulting in significant losses of aerodynamic capability and a shift of the acceleration characteristics of the engine. The ASCED program used a comprehensive approach that included modeling of the aerodynamic characteristics of the components, the engine, and its control system; component tests to establish baseline characteristics of the components and the engine; and detailed exploratory investigations into several techniques to modify and enhance the stability of the components and the overall engine system.
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From page 45...
... The directorate's efforts to adapt and use analytical tools, addressing aerodynamic characteristics, and the resulting dynamic interaction of helicopter structures are considered by the Board to be sound engineering work on the basis of individual programs but of more value when viewed as part of the total analytical capability of VTD. This value is further enhanced when the analytical capability is placed in the context of an integrated package of analysis, model testing, and full-scale component and vehicle testing.
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From page 46...
... This capability also holds the potential for extending equipment deployment and decreasing the load on critical depot assets. Programs such as the Active Twist Rotor, Tiltrotor Aeroelasticity, Multigrid Methods for HighResolution CFD, and some of the advanced turbine material characterization programs are more long term in nature, since they are in the methods validation phase and, while a portion of these programs may find near-term applications, their full value will be realized in solving future problems and configuring new systems.
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From page 47...
... The VTD is staffed with capable people, who, in some cases, would benefit from broader exposure to others working in their fields or in similar fields.
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Key Terms

  • analytical tools
  • analytical capability
  • analytical modeling
  • vtd mission
  • methods validation

  • aerodynamic characteristics
  • currently underway
  • sound engineering
  • coaxial rotor
  • overall engine

  • board notes
  • planning activity
  • aeronautics program
  • ground vehicle
  • nasa aeronautics

  • significant events
  • broader community
  • lesser negative
  • heavy lift
  • vtd makes

  • resulting dynamic
  • advanced structures
  • applying analytical
  • assessment period
  • twist rotor

  • modeling effort
  • followed sound
  • work currently
  • nasa programs
  • rotor concept


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