Novel Eulerian Vorticity Transport Wake Module for Rotorcraft Flow Analysis

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911W6-06-C-0057
Agency Tracking Number: A052-065-1036
Amount: $729,836.00
Phase: Phase II
Program: SBIR
Awards Year: 2006
Solicitation Year: 2005
Solicitation Topic Code: A05-065
Solicitation Number: 2005.2
Small Business Information
34 Lexington Avenue, Ewing, NJ, 08618
DUNS: 096857313
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Glen Whitehouse
 (609) 538-0444
Business Contact
 Barbara Agans
Title: Administrator
Phone: (609) 538-0444
Research Institution
Accurate performance prediction is essential to the development of Army rotorcraft as well as the support of flight operations. While current numerical analysis tools can, in principle, model complete rotorcraft, in practice these implementations are severely hampered by accuracy limitations broadly attributed to modeling assumptions (e.g., vortex core models in Lagrangian methods) or numerical deficiencies (e.g. excessive numerical diffusion for Eulerian CFD). Thus, commonly used analysis tools fail to predict adequately the unsteady wakes and load distributions of rotor and fuselage designs. An approach that combines the first-principles physical modeling capability of Eulerian schemes with the vortex preservation capabilities of Lagrangian vortex techniques has long been needed. Enabled by recently-developed breakthrough technologies in Eulerian wake modeling that specifically address the critical numerical diffusion issue, this effort will develop a first-principles Eulerian vorticity transport wake module that will provide an unprecedented ability to capture the true temporal and spatial structure of the rotor wake when coupled to a wide range of CFD tools. In Phase I, a prototype wake module was developed and demonstrated through coupling to several representative CFD models. Phase II will see key enhancements, validation and packaging of a module with significantly expanded functionality tailored to Army needs.

* Information listed above is at the time of submission. *

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