Combined type supersonic speed jet flow noise reduction spray pipe

• Main Authors: PU QI, NING RONGHUI, DONG BIN, LIU JIACHENG, YANG DANGGUO, LIU YANG, WANG LIANGFENG, ZHOU FANGQI
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2024
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; JET-PROPULSION PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

The invention discloses a combined supersonic jet flow noise reduction spray pipe which comprises a base body spray pipe, a corrugated spray pipe and a sawtooth spray nozzle which can be connected with one another, and the sawtooth spray nozzle comprises an inner layer of spray nozzles and an outer layer of spray nozzles which can rotate relative to one another and is used for studying the influence rule of inner wall corrugations and the sawtooth spray nozzles on supersonic jet flow noise. And verifying the noise reduction effect of the combination of the inner wall corrugations and the sawtooth nozzles and the combination of different sawtooth nozzles. The measured test data can be used for supersonic jet flow noise generation mechanism analysis and control research, and can also provide design reference for nozzle configuration development of advanced fighters. 本发明公开了一种组合式超声速喷流降噪喷管，包括能够相互连接的基体喷管、波纹喷管、锯齿喷嘴，锯齿喷嘴包括内外两层能够相互转动的喷嘴，用于研究内壁波纹、锯齿喷嘴对超声速喷流噪声的影响规律，验证内壁波纹和锯齿喷嘴组合、以及不同锯齿喷嘴组合后的降噪效果。所测得的试验数据可用于超声速喷流噪声产生机理分析