Noise Prediction of Liquid Rocket Engine by the Software AutoSEA2
Because of the high-cost of the spaceflight launching,the reliability of the payload must be ensured in the high level acoustic energy produced by the first stage rocket engine.Its the base for ensuring the normal work of the instruments during the lift-off.In this paper,the exhaust noise and the specific sound field produced by the liquid rocket engine on the ground-test system were measured,and the statistical energy analysis model was built to predict the noise environment of the rocket engine.In order to obtain the noise spectrum loaded on the fairing and the instrument cabin during the lift-off,two measurements were made and some measuring locations were set for each test.During the testing,the sound pressure level around the engine spout and the corresponding heights of the payload cabin were measured.By comparing the data derived from different measuring locations for the same measurement and the different measurements for the same location,the characteristics of the noise field was obtained.Results showed that the measured data agreed well with the predicted data used AutoSEA2 software.
liquid rocket engine ground-test system noise measuring Statistical Energy Analysis
XiaoLong DUAN XiaoYong LIU
Coll.of Astronautics,Northwestern Polytechnical Univ.Xran,China Xian Aerospace Propulsion Institute.Xian,China
国际会议
太原
英文
794-798
2012-01-13（万方平台首次上网日期，不代表论文的发表时间）