摘要
在小型火箭发动机点火实验的基础上,利用噪声传感器测量了发动机燃气射流气动噪声在各个方向上的声压级,获得了超声速射流气动噪声的辐射特性。实验结果表明:(1)噪声遮蔽对发动机超声速射流气动噪声有明显的降噪效果;(2)曲面型噪声遮蔽出口的降噪能力要好于平面型出口。
Sound Pressure Level of engine jet noise in several directions was measured using noise sensor based on the firing experiment of small rocket engine. The radiation characteristics of supersonic jet noise were obtained. The experimental results indicate that: ( 1 ) Acoustical shielding reduces engine supersonic jet noise distinctly; (2) The efficiency of noise reduction of curved surface at Acoustical shielding exit is better in comparison with Plain surface.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2009年第4期1606-1608,1614,共4页
Journal of Astronautics
关键词
火箭发动机
气动噪声
噪声遮蔽
测量
Rocket engine
Jet noise
Acoustical shielding
Measurement
作者简介
刘占卿(1969-),男,博士生,兵器发射理论与技术专业,研究方向为飞行器测试发控理论与技术。通信地址:北京4702信箱10号(100028)电话:(010)66358513 E-mail:liu_zhanqing@126.com