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ASoftware Toolset for Synthetic Turbulence Generation at Zonal Hybrid RANS/LES Interfaces

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: 80NSSC20C0408
Agency Tracking Number: 204777
Amount: $124,999.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: A1
Solicitation Number: SBIR_20_P1
Timeline
Solicitation Year: 2020
Award Year: 2020
Award Start Date (Proposal Award Date): 2020-08-04
Award End Date (Contract End Date): 2021-03-01
Small Business Information
6210 Keller's Church Road
Pipersville, PA 18947-1020
United States
DUNS: 929950012
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Balaji Muralidharan
 (215) 766-1520
 balajim@craft-tech.com
Business Contact
 Jessica Gillespie
Phone: (215) 766-1520
Email: jgillespie@craft-tech.com
Research Institution
N/A
Abstract

At NASA, there is an increased interest in using Computational Fluid Dynamics (CFD) tools to evaluate different aircraft designs and analyze their performance. The commonly used hybrid approaches employing Reynolds Averaged Navier Stokes (RANS) in attached regions and Large Eddy Simulation (LES) in regions of flow unsteadiness and separation, suffers from many issues related to the generation of resolved turbulence at the RANS/LES interface degrading their predictive accuracy. CRAFT Tech proposes to develop an integrated, modular, well-validated software toolset for the generation of acoustically adapted synthetic turbulence to be used in conjunction with any zonal hybrid RANS/LES approaches. This software toolset is envisioned to be a collection of STG approaches that are suited for various CFD codes used by NASA. Due to the artificial nature of the generated turbulence, it may not be entirely possible to avoid propagation of artificial acoustic disturbances from the interface. To address this, the toolset would also include an optional acoustic module than can be used to filter out spurious pressure fluctuations arising from the RANS/LES interface due to the synthetic turbulence generation. Many of the required feature sets for development and testing of the proposed toolset such as hybrid RANS/LES and WMLES turbulence models are already present in CRAFT CFDreg; and CRUNCH CFDreg; multi-physics codes developed and maintained at CRAFT Tech. The modeling capability will provide NASA with the means to efficiently characterize the flow across a RANS/LES interface thus drastically improving the predictive capability of the hybrid method. The toolset will be capable of interfacing with major CFD codes used by NASA such as FUN3D, LAVA, and OpenNCC, among others.

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

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