NASA SBIR 2016 Solicitation

FORM B - PROPOSAL SUMMARY


PROPOSAL NUMBER: 16-1 H10.02-7667
SUBTOPIC TITLE: Advanced Propulsion Systems Ground Test Technology
PROPOSAL TITLE: Robust Cryogenic Cavitation Modeling for Propulsion Systems Ground Test Facilities

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Tetra Research Corporation
420 Park Avenue West
Princeton, IL 61356 - 1934
(815) 872-0702

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Dr. Rex Chamberlain
rex@tetraresearch.com
420 Park Avenue West
Princeton, IL 61356 - 1934
(815) 872-0702

CORPORATE/BUSINESS OFFICIAL (Name, E-mail, Mail Address, City/State/Zip, Phone)
Dr. Rex Chamberlain
rex@tetraresearch.com
420 Park Avenue West
Princeton, IL 61356 - 1934
(815) 872-0702

Estimated Technology Readiness Level (TRL) at beginning and end of contract:
Begin: 3
End: 4

Technology Available (TAV) Subtopics
Advanced Propulsion Systems Ground Test Technology is a Technology Available (TAV) subtopic that includes NASA Intellectual Property (IP). Do you plan to use the NASA IP under the award?
No

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
Rigorous ground testing mitigates space propulsion system risk by enabling advanced component and system level rocket propulsion development and by demonstrating that designs reliably meet the specified requirements over the operational envelope before the first flight. The development of advanced ground test technology components and systems that are capable of enhancing environment simulation, minimizing program test time, cost and risk and meeting environmental and safety regulations is focused on near-term products that augment existing state-of-the-art propulsion system test facilities. Thus improved capabilities to model and predict component behavior in harsh ground test environments are needed for enhanced facility design. In particular, components such as valves, check valves and chokes that are subjected to high pressure, high flow rate cryogenic environments will experience potentially damaging two phase flow effects such as cavitation. Robust cryogenic cavitation models for real fluids equations of state in the presence of mixed supersonic/subsonic flows are demonstrated to deal with poor solution convergence and numerical instabilities. The proposed innovation leverages modifications to the local preconditioning formulation of the Roe flux with a barotropic equation of state and uses a representative component flow problem to demonstrate the effectiveness of enhanced modifications to the cryogenic liquid tabular equation of state. Instabilities arising from the single temperature assumption in the two phase mixture equation of state, which must often be evaluated by extrapolating data too far from the saturation curve, are eliminated with a nonlinear temperature limiter that precludes non-physical behavior, such as imaginary mixture sound speeds. The result is an efficient, robust cryogenic cavitation model suitable for application to propulsion systems ground test facility component design and analysis efforts.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
This technology will provide NASA with an efficient, robust cryogenic cavitation modeling and prediction tool suitable for application to propulsion systems ground test facility component design and analysis. The research product will provide enabling engineering and scientific technologies to predict complex cryogenic flow problems, reduce ground test facility costs and overall system risk while increasing test productivity. Potential enhancements include improved treatment of evaporation and condensation rates, turbulence/cavitation interaction modeling, liquid/vapor thermal interface effects, variable transport properties, expanded thermodynamic databases and extended model validation. The proposed cavitation modeling tool is also applicable to hydrogen inducers, impellers and pumps operating at high vapor fraction.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
The growing trend toward coupled multi-physics analyses is opening significant new markets as more difficult problems can be addressed using advanced computational techniques. The ability to robustly model complex cryogenic flows with cavitation will allow the commercial aerospace and defense industries to improve design and development of new products and streamline ground testing. Our analysis software can also be applied to marine propellers, boiler feed pumps and refrigerant systems. The basic architecture of the modeling framework can remain the same while new plug-in modules are developed to address different physics and design requirements.

TECHNOLOGY TAXONOMY MAPPING (NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.)
Actuators & Motors
Cryogenic/Fluid Systems
Models & Simulations (see also Testing & Evaluation)
Simulation & Modeling
Software Tools (Analysis, Design)

Form Generated on 04-26-16 15:14