DFDC Summary

• Axisymmetric components
  • Centerbody
  • Duct walls
  • Rotor
  • Stator
  • Drag sources
• Input file
  • Keyword-driven case input file
• Aerodynamic outputs
  • Duct forces and moments
  • Rotor forces
  • Stator forces
• Analysis capability
  • Duct with actuator disk (specified loading)
  • Duct with rotor blade (specified blade geometry)
  • Stator modeled as actuator disk (with swirl and torque)
  • Stator modeled as bladed disk
  • Arbitrary number of rotor/stator rows
  • Freestream velocity, rotor RPM
  • Drive to specified thrust
  • Effects of duct drag sources
  • Rotor tip gap modeling
  • Control vane forces and moments
• Rotor/Stator design capability
  • Design blade chord to specified circulation
  • Design blade twist for specified chord and circulation
  • Blade pitch and twist changes
• Geometric redesign of duct walls
  • XFOIL-like geometry modification (GDES)
• BL analysis of duct and centerbody walls, viscous forces
  (one-way coupled for now)
• Aerodynamic redesign of duct walls to specified pressures

Whirlwind Summary

• Whirlwind is a Win32 GUI wrapper for DFDC
  (currently does not support all DFDC functionality)
• DFDC can be used without Whirlwind, via DFDC's XFOIL-like text menus

Release Conditions

• DFDC and Whirlwind are released under the GNU General Public License. Short version is here.
• By downloading the software you agree to abide by the GPL conditions.

Management and Sponsorship

• DFDC was developed under contract with Booz Allen Hamilton Inc.,
  with the sponsorship of the Tactical Technology Office of DARPA
  (Defense Advanced Research Projects Agency)
• Contacts/Good-Guys:
  Brad Tousley, brad.tousley (at) darpa (dot) mil
  Paul Eremenko, eremenko_paul (at) bah (dot) com

Software

• DFDC_v0.70.zip
  DFDC 0.70 for Unix and Win32. Zipped directory image.
  All source code. User Guide. Theory document. Sample DFDC session inputs.
  EXE file for Windows.
  Linux implementation Requires Fortran 77, C compilers, windowing support.
• Whirlwind_exe_9-30-2005.zip
  
• Whirlwind_src_9-30-2005.zip
  

Documents

• dfdc_doc.txt
  User Guide in plain text
• DFDC-menus.txt
  Printout of DFDC module menus
• version_notes.txt
  Summary of changes made for recent DFDC versions.
• DFDCtheory12-31.pdf
  Theory document in PDF.

Authors:

• Harold Youngren, guppy (at) maine (dot) rr (dot) com [DFDC]
• Mark Drela, drela (at) mit (dot) edu [DFDC innards]
• Scott Sanders, ssanders (at) post (dot) harvard (dot) edu [Whirlwind]

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