2021-10-04

NASA prepares for the future Artemis moon mission through SLS rocket engine series tests

By yqqlm yqqlm

NASA prepares for the future Artemis moon mission through SLS rocket engine series tests </ P >

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p > Johnny hevlin, manager of SLS liquid engine office at NASA Marshall Space Flight Center in Huntsville, Alabama, said: “The successful test series of rs-25 engine of space launch system brings us one step closer to manufacturing the first new engine for future Artemis lunar missions. We are testing engine components manufactured with advanced manufacturing technology, which can reduce the cost of each engine by more than 30%, but still maintain the reliability and high performance of rs-25 engine. “</ P >

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p > during the hot test on September 30, the operator tested rs-25 development engine 0528 for more than 8 minutes (500 seconds) Thrust test, which is the same as the time required for actual launch. </ P >

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p > this series of tests provides valuable information for Aerojet Rocketdyne, the main contractor of SLS engine, because the engine it produces will be used after Artemis IV lunar mission. Operators collected thermal data to demonstrate and verify the capabilities of various engines and evaluate the use of state-of-the-art and cost-effective technologies New engine components manufactured by technology to reduce operational risk. </ P >

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p > the components tested include a 3D printed pogo accumulator to suppress pressure oscillations that may lead to flight instability, and a hot isostatic pressure (hip) Main combustion chamber manufactured by bonding technology. These components are an early important milestone in NASA and Aerojet Rocketdyne’s efforts to maximize the use of state-of-the-art manufacturing methods to significantly reduce the cost and time required to manufacture the new rs-25 engine. </ P >

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p > due to Hurricane IDA, which hit the coastal area of the Gulf of Mexico on August 29 “The test on September 30 was delayed from the original date. The storm initially affected propellant deliveries to the centre and had to be postponed when suppliers restored full capacity</ p>

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p > four rs-25 motors, together with a pair of solid rocket boosters, will help the SLS provide power during launch. When these engines are launched at the same time, they will generate 1.6 million pounds of thrust during liftoff and 2 million pounds of thrust during ascent</ p>

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p > the previous rs-25 test in Stannis began on January 9, 2015 and ended on April 4, 2019. During this period, NASA completed the acceptance test of the former space shuttle main engines, which will help power the first four SLS missions, developed and tested the airworthiness of all 16 new controllers (plus one standby) to be used in the traditional rs-25 engine, and proved the ability of the rs-25 engine to launch the heavier SLS rocket at the higher power level</ p>

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p > the first heat of the latest series was held on January 28, 2021. In this seven part test series, conducted simultaneously with the SLS core level green operation test in Stannis, the development engine No. 0528 experienced a 3650 second hot test. The program consists of six full-length thermal tests over 8 minutes (500 seconds) and one thermal test less than 11 minutes (650 seconds). The whole process test refers to the time that the engine must burn during the actual launch in order to provide power for the SLS to enter the orbit. The longer hot test is to test the performance limit of the engine</ p>

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p > the retrofit-2 test series was carried out after the main maintenance and upgrading project of the A-1 test bench, including the installation of a new NASA designed and manufactured thrust vector control system on the structure, so that the operator can “universal” test rs-25 engines and move them on a tight circular shaft. Universal joint is the key capability to ensure that SLS can maintain the correct flight trajectory</ p>

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p > the operator plans to start the follow-up retrofit-3 test series on the A-1 test bench later this fall, using rs-25 development engine no.0525. This new series will continue to collect data for the production of new engines</ p>

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p > NASA is making SLS the most powerful rocket in the world. With Artemis, NASA will land the first woman and the first colored man on the lunar surface and realize long-term exploration on the moon</ p>