| 波浪滑翔机推进装置翼片的启动阶段水动力学分析 |
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| 引用本文： | 于振江,常宗瑜,郑中强,孙秀军,卢桂桥.波浪滑翔机推进装置翼片的启动阶段水动力学分析[J].中国海洋大学学报(自然科学版),2020,50(4):121-127. |
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| 作者姓名： | 于振江 常宗瑜 郑中强 孙秀军 卢桂桥 |
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| 作者单位： | 中国海洋大学工程学院,山东青岛266100;山东省海洋工程重点实验室,山东青岛266100;中国海洋大学海洋与大气学院,山东青岛266100;中国海洋大学工程学院,山东青岛266100 |
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| 基金项目： | 国家自然科学基金项目(51875540;51175484);中央高校基本科研业务费专项项目(201513053);教育部博士点专项基金项目(20130132110024);高等学校学科创新引智计划项目(B14028)资助。 |
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| 摘 要： | 波浪滑翔机直接利用波浪能实现大范围长距离的机动运动观测,在海洋环境观测中可以发挥重要的作用。本文对波浪滑翔机推进装置在启动阶段的翼片的水动力学行为进行了研究。以波浪滑翔机水下推进装置的翼片为研究对象,运用雷诺平均Navier-Stokes方程(RANS),对给定垂荡和摆动运动的翼片水动力学进行了水动力分析和仿真,模拟了单个翼片、纵向阵列多翼片的运动状况,得到推进装置翼片附近的压力分布和整体推进动力,分析翼片间距变化在启动阶段对推进力的影响作用。通过该研究工作为深入理解波浪滑翔机推进装置工作状态提供了理论依据。
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| 关 键 词： | 波浪滑翔机 水动力学 RANS 动网格 启动阶段 |
Hydrodynamic Analysis of Wave Glider in Start-up Period |
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| YU Zhen-Jiang,CHANG Zong-Yu,ZHENG Zhong-Qiang,SUN Xiu-Jun,LU Gui-Qiao.Hydrodynamic Analysis of Wave Glider in Start-up Period[J].Periodical of Ocean University of China,2020,50(4):121-127. |
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| Authors: | YU Zhen-Jiang CHANG Zong-Yu ZHENG Zhong-Qiang SUN Xiu-Jun LU Gui-Qiao |
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| Institution: | (College of Engineering,Ocean University of China,Qingdao 266100,China;Key Lab of Ocean Engineering of Shandong Province,Qingdao 266100,China;College of Oceanic and Atmospheric Sciences,Qingdao 266100,China) |
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| Abstract: | The wave glider is able to use wave energy to realize mobile measurement with long range and distance,playing an important role in ocean environment measurement.Wave glider,with the float move up and down,relies on the propulsion mechanism to produce hydrodynamic of the fin to achieve movement.In the process of start-up,steady operation and recovery,etc.,the dynamic performance of the glider is different.According to experimental of the wave glider,the working principle were observed.It estimates that the swing of the fin accounted for 1/4 of the whole movement period,and the maximum swing angle of the fin was 28°when the experimental period was 6.5 s and the amplitude was 0.5 m.During simulation,it assumes that the motion of the floating body completely matches with the wave,that is to say,the motion period of the fin equals to the wave period and the amplitude of the rising and falling is equal to the wave amplitude.The fins’hydrodynamic behavior of the propulsion device is studied during the start-up period.One of the differences from the stable operation phase is that the forward speed is zero at this time;the force and the flow field in the start-up period are analyzed by setting the active motion of fin.Based on Reynolds average Navier-Stokes equation(RANS),the motion of single fin and longitudinal array of multi-fins were simulated by Fluent.The driving force was emphatically analyzed considering different distance of thrust fin.The conclusions could be obtained as follows:When the fin attains the maximum angle,position-limiting will cause the mutation of the propulsion force.When the start-up period has not yet reached a stable state of operation,the thrust generated in the first half of the cycle is greater than the latter half of the cycle.The fins can generate forward propulsion following the floating buoy up and down under wave excitation.Comparing the propulsion force generated by each fin in a longitudinal array of fins in a motion cycle,the propulsion force generated by a single fin is greater than that of each fin in the longitudinal array fin,and the propulsion force generated by the fins are different in different positions.Comparing the propulsive forces generated by the fins at different pitches of the longitudinal array fin,the propulsive forces generated by the first and last fins are greater than those generated by the middle fins.Comparing the force of different longitudinal array of the fin with the different distance,the best distance of the fin is found and is equal 15 mm.This work provides the theoretical basis for understanding the working state of the propulsion device-Wave glider. |
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| Keywords: | wave glider hydrodynamics RANS dynamic mesh launch stage |
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