Overview of RS-25 Adaptation Hot-Fire Test Series for SLS, Status and Lessons Learned

Vetcha, Naveen ; Strickland, Matthew B ; Philippart, Kenneth D ; Giel, Thomas V, Jr

关键词: BEAT FREQUENCIES;    CONTROLLERS;    ENGINE TESTS;    FLIGHT CONTROL;    OSCILLATORS;    SHUTDOWNS;    SPACE SHUTTLE MAIN ENGINE;    SYSTEMS ENGINEERING;    VALVES;    ALTERNATING CURRENT;    ENGINE DESIGN;    LESSONS LEARNED;    PREBURNERS;    RADIATION HARDENING;    SIGNAL PROCESSING;    SPACE LAUNCH SYSTEM (SLS);    TRANSFORMERS;   

RP-ID  :  M18-6787

学科分类：航空航天科学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

This paper discusses the engine system design, hot-fire test history and analyses for the RS-25 Adaptation Engine test series, a major hot-fire test series supporting the Space Launch System (SLS) program. The RS-25 is an evolution of the Space Shuttle Main Engine (SSME). Since the SLS mission profile and engine operating conditions differ from that experienced by the SSME, a test program was needed to verify that SLS-unique requirements could be met by the adapted legacy engines. A series of 18 tests, including one engine acceptance test, was conducted from January 2015 to October 2017, to directly support Exploration Mission-1 (EM-1), the first flight of SLS. These tests were the first hot-firings of legacy SSME hardware since 2009. Major findings are described along with top level overview of the engine system.