Modeling Unsteady Cavitation Effects and Dynamic Loads in Cryogenic Systems

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$599,465.00
Award Year:
2005
Program:
SBIR
Phase:
Phase II
Contract:
NNM05AA05C
Award Id:
67323
Agency Tracking Number:
033132
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
6210 Keller's Church Road, Pipersville, PA, 18947
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
929950012
Principal Investigator:
Ashvin Hosangadi
(215) 766-1520
hosangad@craft-tech.com
Business Contact:
Paula Schachter
Business Official
(215) 766-1520
schachte@craft-tech.com
Research Institute:
n/a
Abstract
There currently are no analytical or CFD tools that can reliably predict unsteady cavitation dynamics in liquid rocket turbopumps. Cavitation effects, particularly at low-flow, off-design conditions, generate large amplitude pressure fluctuations that result in performance loss, and may interact with other components to generate damaging system-wide instabilities. The innovation proposed here is the development of a numerical tool that can predict amplitudes and frequencies of dynamic pressure loads in cryogenic turbopumps. This innovation will address the inclusion of advanced unsteady cavitation models for cryogenic fluids, development of boundary conditions that include interactions with other system components, and unsteady turbulence models for off-design conditions. The resulting product, a specialized version of the multi-element unstructured CRUNCH CFDREG code, will be a well-validated and reliable analysis tool that can be used to predict off-design performance of liquid rocket turbopumps. Furthermore, this tool can provide unsteady loading information necessary for stress and fatigue life modeling of inducer blades. It would also be able to quantify an inducer's mean head breakdown characteristics as a function of design variables. Thus this simulation software will be used for providing design support, as well as being an analysis tool for diagnosing cavitation related anomalies in operational systems.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government