空化对电磁计程仪传感器的影响  

Influence of cavitation on electromagnetic log sensor

作　　者：张宁[1] ZHANG Ning(Naval Representative Offi ce of Warship Design & Research, Shanghai 200011,China)

机构地区：[1]海军驻上海地区舰艇设计研究军代表室,上海200011

出　　处：《船舶》2016年第6期76-80,共5页Ship & Boat

摘　　要：以某型出口国外13米级高速艇为研究对象,具体分析一例电磁计程仪在高速情况下引起的失捕现象。首先介绍电磁计程仪传感器的工作原理,对船体断阶处容易产生空泡及其危害进行理论分析,接着对传感器安装处进行压力分布仿真分析。最后得出结论 :在满足一定船速和水温的条件下,换能器突出船底产生气泡将导致电磁计程仪无法测速。Taking example by a 13 m high-speed vessel exported abroad, this paper analyzes a case of electromagnetic log signal missing under the high speed condition. It introduces the working principle of the electromagnetic log sensor, and theoretically analyzes the cavitation at the ship stepped bottom and its hindrance.Then it numerically simulates the pressure distribution of the installation site of the sensor. It finally concludes that the cavitation will be caused by the transducer standing outside the hull bottom at a certain ship speed and water temperature, thus leading the electromagnetic log unable to measure velocities.

关 键 词：空化 电磁计程仪 高速艇 船舶流体力学 

分 类 号：U666.152[交通运输工程—船舶及航道工程]