摘要
为获取分层流体中螺旋桨尾迹的水动力学特性,在大型分层流水槽中采用多点组合探头阵列测量技术,对具有连续密度跃层流体中Suboff自航体模型螺旋桨产生的扰动特征进行了定量测量与分析。与拖曳体模型的尾迹特征比较,螺旋桨效应在分层流体中的水动力学尾迹具有特殊结构,其临界Froude数增大为Frs=4.4,波动中存在2种扰动波系,包含低频波动和非对称波形结构。相关结果不仅建立了对分层海洋中复杂螺旋桨效应的初步认识,也为分层海洋中螺旋桨水动力学尾迹建模及其应用提供了进一步的实验依据。
To obtain hydrodynamics characteristics of the propeller wake in the stratified fluid, the quantitative measurement ＆analysis of the disturbed characteristics produced by a standard SUBOFF model with an propeller in the large-type stratified fluid tank of continuous density pycnocline were conducted by means of the multi-channel conductivity-probe arrays. The special configurations about the propeller effect in the stratified fluid were obtained in comparison with the characteristics of the internal wave generated by a towed body. For example, the critical Froude number becomes Frs=4. 4, double-wave system exits in wave, and the propeller wake contains low frequency behavior and asymmetrical structure. So some new understanding of the complicated propeller-effect in the ocean of stratification is established, and the more experimental evidences for the propeller-wake modeling and its application are provided.
出处
《解放军理工大学学报（自然科学版）》
EI
北大核心
2014年第6期576-582,共7页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(11472307)
关键词
分层流
内波
尾迹
螺旋桨效应
低频扰动
stratified fluid
internal wave
wakes
propeller effect
low frequency disturbance
