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Turbulent Scalar Transport Model Validation for High Speed Propulsive Flows

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2008 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Combustion Research and Flow Technology, Inc.
6210 Kellers Church Road Pipersville, PA -
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2008
Title: Turbulent Scalar Transport Model Validation for High Speed Propulsive Flows
Agency: NASA
Contract: NNX08CB31P
Award Amount: $99,857.00


This effort entails the validation of a RANS turbulent scalar transport model (SFM) for high speed propulsive flows, using new experimental data sets and accompanying large-eddy simulation (LES) solutions. The SFM has been used to predict local values of the turbulent Prandtl and Schmidt numbers and also provides the rms scalar fluctuation values that are used with assumed PDF models for turbulent combustion. Performing the experimental work in unison with LES studies ensures that the two sets of data will be fully compatible, and may be used to support SFM model validation. Work to date indicates some deficiencies in the present SFM model for high speed mixing problems where the two streams have very different densities, which we will attempt to resolve in this program. PIV data for the transverse injection of hot air and helium/nitrogen mixtures into a Mach 3.5 stream will be obtained in unison with LES studies to yield scalar fluctuation data not readily obtained in experiments. SFM upgrades will be performed using this unified data. Experiments will be performed by Dr. Seiner and coworkers at U. Miss using a new 12"x12" trisonic tunnel and existing slot/round jet injector models.

Principal Investigator:

William Calhoon
Principal Investigator

Business Contact:

Paula Schachter
Office Manager & FSO
Small Business Information at Submission:

Combustion Research and Flow Technology
6210 Keller's Church Road Pipersville, PA 18947

EIN/Tax ID: 232759059
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No