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Modeling Unsteady Cavitation Effects and Dynamic Loads in Cryogenic Systems

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2005 / 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 2
Fiscal Year: 2005
Title: Modeling Unsteady Cavitation Effects and Dynamic Loads in Cryogenic Systems
Agency: NASA
Contract: NNM05AA05C
Award Amount: $599,465.00


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.

Principal Investigator:

Ashvin Hosangadi

Business Contact:

Paula Schachter
Business Official
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