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Novel Design of Orifice Type Control Element for Mitigating Instabilities

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2012 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Combustion Research and Flow Technology,
6210 Kellers Church Road Pipersville, PA 18947-
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 2012
Title: Novel Design of Orifice Type Control Element for Mitigating Instabilities
Agency: NASA
Contract: NNX12CB10C
Award Amount: $749,981.00


An orifice element is commonly used in liquid rocket engine test facilities to provide a large reduction in pressure over a very small distance in the piping system. Orifice elements are used in propellant lines, feed systems, plume suppression systems and steam ejector trains. While the orifice as a device is largely effective in stepping down pressure, it is also susceptible to a wake-vortex type instability and cavitation instability that propagate downstream and interact with other elements of the test facility resulting in structural vibration. In this proposal a new proprietary instability mitigation device has been developed that steps down the pressure, straightens the flow and suppresses all instability modes. The device is scalable and can be used for different mass flow rates and varying levels of de-pressurization conditions. It is relatively inexpensive to manufacture, easy to fabricate and install, and can be tailored to meet the performance requirements of a given facility. In Phase I, the device has been successfully demonstrated in a sub-scale cryogenic test facility. In Phase II the performance of the device will be calibrated for full-scale operation in a cryogenic test facility and a water test facility.

Principal Investigator:

Vineet Ahuja
Principal Investigator

Business Contact:

Katherine Young
Business Official
Small Business Information at Submission:

Combustion Research and Flow Technology
6210 Keller's Church Road Pipersville, PA 18947-1020

EIN/Tax ID: 232759059
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
University of Alabama, Huntsville
Office of Sponsored Programs, VBRH Suite E12
Huntsville, AL 35899-0000
Contact: David Lineberry