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Modeling of Variable Surface Roughness Effects in Turbulence Models for…

Award Information

Department of Defense
Award ID:
Program Year/Program:
2014 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
MetroLaser, Inc.
CA Irvine, CA 92618-2008
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Woman-Owned: No
Minority-Owned: Yes
HUBZone-Owned: No
Phase 2
Fiscal Year: 2014
Title: Modeling of Variable Surface Roughness Effects in Turbulence Models for Rotorcraft Applications
Agency / Branch: DOD / ARMY
Contract: Ww911W6-14-G0003
Award Amount: $468,957.00


The goal of this Phase II program is to develop a simulation tool to estimate the aerodynamic effects of variable surface roughness, such as from the surface abrasion of helicopter rotor blades and the protective coatings that are applied to counteract it. The modeling is based on a displacement of origin methodology, within the k-omega turbulence model frameworks. Our initial investigations suggest that this method is effective in non-equilibrium boundary layers. Additionally we will implement and develop intermittency based transition models. We will work with OpenFoam and OVERFLOW CFD solvers which are widely used in the rotorcraft, and aerodynamics community. We expect to develop a state-of-the-art simulation tool for rotor blade drag estimation, and demonstrate capabilities through rotor simulations. The work plan consists of implementation and extension of the roughness models, in addition to development of a general capability for user defined measures of surface roughness. The effort includes verification and validation and also includes experiments to develop validation for configurations that are relevant to the rotorcraft application roughness strips and representative pressure gradients. A transition model will be implemented, with verification and validation using available transition data on turbine geometries.

Principal Investigator:

Jacob George
Sr. Scientist
(949) 553-0688

Business Contact:

Cecil F. Hess
(949) 553-0688
Small Business Information at Submission:

MetroLaser, Inc.
22941 Mill Creek Drive Laguna Hills, CA 92653-1215

EIN/Tax ID: 330584881
Number of Employees:
Woman-Owned: No
Minority-Owned: Yes
HUBZone-Owned: No