SBIR-STTR Award

A Wall-Modeled Large-Eddy-Simulation Tool for Fan Broadband Noise Prediction
Award last edited on: 1/16/2023

Sponsored Program
SBIR
Awarding Agency
NASA : GRC
Total Award Amount
$149,980
Award Phase
1
Solicitation Topic Code
A1.02
Principal Investigator
Lei Tang

Company Information

D&P LLC

3409 North 42nd Place
Phoenix, AZ 85018
   (602) 957-2868
   info@d-p-llc.com
   www.d-p-llc.com
Location: Single
Congr. District: 09
County: Maricopa

Phase I

Contract Number: 80NSSC22PB006
Start Date: 7/20/2022    Completed: 1/25/2023
Phase I year
2022
Phase I Amount
$149,980
This SBIR project proposes to develop a wall-modeled large-eddy-simulation (WMLES) tool for fan broadband noise prediction. Since fan broadband noise results from the interaction of turbulence with solid surfaces, it is important to resolve turbulent eddies up to a certain scale in order to achieve an accurate fan broadband noise prediction. Unfortunately the computational cost of the wall-resolved LES approach is found to scale with the Reynolds number as Re2.72, similar to Re2.91 of the direct numerical simulation (DNS) approach. To obtain a faster tool for fan broadband noise prediction, this SBIR effort will pursue the WMLES approach, in which the inner portion of the boundary layer will be modeled rather than resolved. The approach can reduce the computational cost to Re1.14. As a feasibility study, the Phase I outcome will demonstrate the feasibility of the proposed WMLES approach for accurate simulation of NASA 22-in fan noise source diagnostic test (SDT) case. Therefore, it is meaningful to further refine the methodology and develop a computational software tool for commercialization in Phase II. Potential NASA Applications (Limit 1500 characters, approximately 150 words): The Advanced Air Transport Technology (AATT) and Commercial Supersonic Technology (CST) Projects would benefit from the developed computational tool that could be used to predict the performance and noise impacts of the novel engine installations for noise reduction. The Transformational Tools and Technologies (TTT) Project would benefit from the developed computational tool to enhance the ability to consider acoustics earlier in the aircraft propulsion system design process. Potential Non-NASA Applications (Limit 1500 characters, approximately 150 words): DoD's High Performance Computing Modernization Program would benefit from this computational tool that could provide them a useful tool for fan broadband noise prediction. Design engineers in engine manufacturers can use the developed computational tool to explore various noise reduction concepts and validate fast, low-fidelity analytical methods for trade-off studies and performance prediction. Duration: 6

Phase II

Contract Number: ----------
Start Date: 00/00/00    Completed: 00/00/00
Phase II year
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Phase II Amount
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