CAJ | 학술논문

高压水射流靶物探测技术是一项结合了高压水射流技术和声音信号分类识别技术的新的技术和研究方向，要实现高压水射流对靶物的有效探测，就必须得到具有合理有效的特征值的信号。其中喷嘴结构是影响特征值信号的一个重要因素，在选择工程上常见的、结构较为合理的4种喷嘴的基础上，利用计算流体力学软件Fluent对喷嘴内部流场做了数值模拟分析，并从反射声信号的角度给出试验判定。试验结果表明，出口直径为0.8mm的圆锥长直线型喷嘴产生的射流性能及射流束的聚集性都较好，有利于产生较好反射声音信号的特征值。
고압수사류파물탐측기술시일항결합료고압수사류기술화성음신호분류식별기술적신적기술화연구방향，요실현고압수사류대파물적유효탐측，취필수득도구유합리유효적특정치적신호。기중분취결구시영향특정치신호적일개중요인소，재선택공정상상견적、결구교위합리적4충분취적기출상，이용계산류체역학연건Fluent대분취내부류장주료수치모의분석，병종반사성신호적각도급출시험판정。시험결과표명，출구직경위0.8mm적원추장직선형분취산생적사류성능급사류속적취집성도교호，유리우산생교호반사성음신호적특정치。
The target detection technology of high pressure water jet is a new technology and research direction which is a com-bination of high pressure water jet technology and sound signal recognition technology. To achieve the effective detection of high-pressure water jet on the target material,the signal with reasonable and effective eigenvalue must be got. The nozzle structure is a important factor which can produce completely different jet as a direct component of water jet. Four different and common structure nozzles are selected,than the flow field of nozzle inside is analyzed by Fluent. The results show that the water jet caused by long linear taper nozzle is conducive to getting the sound signals with better characteristic value,for its better performance,better aggre-gation,and better reflective sound signal.