内波的相似律及其实验室量化模拟关系  

Similarity law of internal waves and its quantified relation of experimental simulation

作　　者：姚志崇 马向能[1] 赵峰[2] 刘乐 YAO Zhi-chong;MA Xiang-neng;ZHAO Feng;LIU Le(State Key Laboratory of Deep-sea Manned Vehicles,China Ship Scientific Research Center,Wuxi 214082,China;National Key Laboratory on Hydrodynamics,China Ship Scientific Research Center,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心深海载人装备国家重点实验室,江苏无锡214082 [2]中国船舶科学研究中心水动力学重点实验室,江苏无锡214082

出　　处：《船舶力学》2021年第1期1-8,共8页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(51779232)。

摘　　要：弄清内波的相似律和实验室量化模拟关系,是内波缩比模拟试验研究实用化、解决实际海洋中内波相关科学问题和工程问题的前提。本研究从流动的力学相似条件出发,梳理了内波的相似原理,采用内波预报模型分析了分层结构和分层密度差对内波特征的影响,阐明了分层结构相似是内波相似的必要条件,还分析了内波和表面波相似律的制约关系。实验室中分层密度差一般远大于实际海洋跃层的密度差,内波和表面波相似律不能同时满足,缩比实验模拟结果须根据内波和表面波的特征分别按各自的相似准则换算。Clarification of the similarity law of internal waves and its quantified relation of experimental simulation is a precondition for practical application of reduced scale experimental research on internal waves and for solution of the science problem and engineering problem related to internal waves in the ocean.According to the similarity condition of fluid mechanics,similarity theory of internal waves is analyzed and the effects of the structure and the density difference of the stratified fluids on the character of internal waves are investigated using the predicting model of internal waves.It is clarified that the necessary condition of similarity of internal waves is similarity of the structures of the stratified fluids.The relationship between the similarity law of internal waves and that of surface waves is also analyzed.The density difference of the stratified fluids in the laboratory is greater than that of the marine thermocline,and the similarity laws of internal waves and surface waves cannot be satisfied at the same time,so the reduced scale experimental results should be converted respectively according to the similarity laws of internal waves and surface waves.

关 键 词：分层流 内波 相似律 试验研究 

分 类 号：P731.24[天文地球—海洋科学]