{"project":{"id":5526,"lastUpdated":"2018-10-10","title":"Triaxial Swirler Liquid Injector Development, Phase II","status":"Completed","startDate":"Dec 2005","endDate":"Nov 2007","description":"Sierra Engineering Inc. (Sierra) believes that the subject triaxial liquid propellant swirl injector has the potential to meet many of NASA's Earth-to-Orbit (ETO) propulsion systems goals. The triaxial swirl injector is ideally suited to a wide range of liquid oxidizers and fuels, including hydrogen and a wide range of hydrocarbons. It holds the potential of excellent high-frequency combustion stability characteristics and low injector production cost, similar to a pintle injector. Additionally, the triaxial swirl injector offers the potential for excellent injector and combustion chamber thermal compatibility and outstanding propellant atomization characteristics, both at levels far superior to a pintle injector. The triaxial injector concept is well suited to both main injector and preburner applications. The Phase I SBIR effort focused on understanding the influence design variables have on injector performance. We developed the mechanical design concept for a prototype injector. The proposed Phase II effort will complete the detailed design and analysis of the prototype injector. The test hardware will be fabricated and tested with several propellants. A preliminary design will be developed for a large-scale combustor.","responsibleProgram":"SBIR/STTR","responsibleMissionDirectorateOrOffice":"Space Technology Mission Directorate","leadOrganization":{"name":"Marshall Space Flight Center","type":"NASA Center","acronym":"MSFC","city":"Huntsville","state":"AL"},"workLocations":["Alabama","Nevada"],"programDirectors":["Jennifer L Gustetic"],"programManagers":["Carlos Torrez"],"libraryItems":[],"supportingOrganizations":[{"name":"Sierra Engineering, Inc.","type":"Industry","acronym":null,"city":"Carson City","state":"NV"}],"primaryTas":[],"additionalTas":[]}}