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Simultaneous Orthogonal Imaging for Cold Flow Characterization of Additively Manufactured Injector ElementsAdditively manufactured (AM) injectors have the potential to improve characteristic velocity (C*) performance beyond the 90-97% of theoretical C* performance seen by traditionally manufactured (TM) combustion device injectors. Maximized C* performance yields high overall combustion efficiency in all types of combustion devices, particularly liquid rocket engines (LREs) and rotating detonation rocket engines (RDREs). A high degree of propellant atomization and mixedness is required to achieve maximum C* performance and therefore high overall combustion efficiency. This study focused on measuring and comparing the performance of different novel AM injector elements over a broad range of operating conditions under high pressure, cold flow. As part of this work, a high pressure, cold flow experimental spray facility was designed to measure each element’s injector spray patterns under pressures ranging from 50 to 1000 psig and stiffness ratios from 0.5 to 2.0. Preliminary results are presented from orthogonal, simultaneous imaging comparing atomization and spray geometry between quad, trio, pentad, slotted, and triplet impingers in gas-liquid flow.
Document ID
20220017962
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Ari D Goldman
(Auburn University Auburn, Alabama, United States)
Murphy Mitchell
(Auburn University Auburn, Alabama, United States)
David E Scarborough
(Auburn University Auburn, Alabama, United States)
T Teasley
(Marshall Space Flight Center Redstone Arsenal, Alabama, United States)
Date Acquired
November 29, 2022
Subject Category
Spacecraft Propulsion and Power
Meeting Information
Meeting: AIAA Scitech Forum
Location: National Harbor, MD
Country: US
Start Date: January 23, 2023
End Date: January 27, 2023
Sponsors: American Institute of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: 80NSSC21M0285
CONTRACT_GRANT: CAN 0972-21P/EN21041
CONTRACT_GRANT: NNH19ZHA001C
Distribution Limits
Public
Copyright
Use by or on behalf of the US Gov. Permitted.
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