UCTD探头阻力系数的数值分析及试验研究

Numerical Analysis and Experimental Research on the Drag Coefficient of UCTD Probe

为优化海洋动力参量拖曳式剖面测量系统(Underway Conductivity-Temperature-Depth instrument,UCTD)探头下降速度与稳定性,达到设计测量深度,提高观测数据质量,本文利用外型曲线解析式和探头基本运动方程完成初步设计,通过Fluent软件建立UCTD探头的流体动力学分析模型,计算相应的阻力系数,对其进行结构优化和重量调整,以满足技术指标的要求。2017年春季航次海试数据验证了数值仿真计算与探头结构设计的科学性和合理性,研究结果为UCTD探头水下运动规律研究和探头的设计提供参考。作为走航温盐剖面测量装置,UCTD可以快速、低成本地获取海洋水文剖面资料,广泛应用于海洋环境监测、海洋科学研究以及军事领域。

In order to optimize the descent speed and stability of the Underway Conductivity-Temperature-Depth instrument(UCTD)probe,reach the designed measurement depth and improve the quality of observation data,the preliminary design is completed by using the analytical expression of the external curve and the basic motion equation of the probe in this paper.The fluid dynamics analysis model of UCTD probe is established by Fluent software;the corresponding resistance coefficient is calculated,and the structure optimization and weight adjustment are performed to meet the requirements of technical indicators.The scientificity and rationality of numerical simulation calculation and probe structure design is verified by the sea trial data of the spring voyage in 2017.The research results provide a reference for the study of UCTD probe's underwater motion law and probe design.As a navigation temperature-salt profile measurement device,which can obtain marine hydrological profile data quickly and at low cost,is widely used in marine environmental monitoring,marine scientific research,and military fields.