NASA 1996 SBIR Phase I


PROPOSAL NUMBER : 96-1 01.04-5532A

PROJECT TITLE : A New Approach to Turbulence Modeling

TECHNICAL ABSTRACT (LIMIT 200 WORDS)

Turbulence is a crucial component of viscous flow computations. In this work a novel approach to turbulence modeling is proposed which has a complexity and computational cost comparable to two-equation models, while at the same time having a much greater predictive capability and accuracy associated with Reynolds stress transport equation models. The model is constructed by using a mathematical transformation to reduce the tensor Reynolds stress transport equations to a vector system of equations. Besides computational efficiency, the proposed model is significantly easier to implement in numerical schemes which employ unstructured or curvilinear meshes. It is superior to standard two-equation models because it captures more of the turbulent physics, and also because additional physical effects (heat transfer, chemical reactions, sprays, etc.,) can be included in a straightforward manner. A numerical algorithm will be developed to demonstrate the efficiency and accuracy of this model. The model will be tested and tuned using a variety of standard benchmark turbulent flows, and it is anticipated that preliminary results from this model will demonstrate the superior predictive capabilities of the model. The accuracy and reduced cost of this turbulence model will significantly enhance NASA's ability to predict complex turbulent flows.
POTENTIAL COMMERCIAL APPLICATIONS
This turbulence model will be sold as an add-on (black-box) enhancement to existing commercial CFD codes, and is expected to significantly enhance the sales of the company's internal CFD code, currently under development.
NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR
J. Blair Perot,
Aquasions Inc.,
190 South Road,
Canaan NH 03741
NAME AND ADDRESS OF OFFEROR
J. Blair Perot,
Aquasions Inc.,
190 South Road,
Canaan NH 03741