1) vertical commutating fin
垂向整流鳍
1.
Research and its application of the mechanism about the vertical commutating fin before screw at stern for reducing vibration;
船尾桨前垂向整流鳍的减振机理研究及其应用
2) the double stern fins
整流鳍
1.
Since the ship has been constructed, instead of modifying the shape of the submerged afterbody of ship, the double stern fins are designed and installed on the ship.
在实船已经建成,船体线型无法修改的情况下,在艉部设计并加装整流鳍,改善了该船桨盘面伴流分布的不均匀性,从而降低由螺旋桨脉动压力所引起的剧烈振动,使该船最终得以顺利交船。
3) vertical flow
垂向流
1.
There is a problem that the vertical flow exists in the generalized tracing dilution model, which conflicts with the fluid volume conservation.
但是由于垂向流的产生,使得在广义稀释模型中流量的条件很难成立。
2.
Owing to are some questions about the traditional dilution formula and the generalized dilution formula deduced by predecessors,a new dilution formula was derived to calculate seepage velocity with tracer method,based on the condition that there existed vertical flow in the borehole and a reasonable physical model was adopted,considering the seepage velocity as a function of tracer dilution time.
基于传统稀释公式和前人推导的广义稀释公式存在的种种问题,在钻孔中存在垂向流的情况下,在合理的物理模型的基础上,考虑了渗透流速是示踪剂稀释时间的函数,重新推导了示踪方法测流速的稀释公式。
3.
It is also discussed how to measure the horizontal flow when vertical flow exists in the borehole.
根据钻孔后的实际情况 ,分析了Drost等人点稀释法测量地层渗透性理论的局限性 ,研究了如何在多含水层中系统中孔中存在垂向流时测量流速的方法。
4) saltation trajectory
垂向气流
5) vertical circulation
垂向环流
1.
The calculated re-sults show that there exist vertical circulations mainly formed by diluted water of upperlayer and salt water of lower layer for compensation in the east and west channels of theLingdingyang Estuary.
结果表明，东、西两槽均存在由湾口表、中层冲淡水和底层上溯流构成的垂向环流，平均流、斯托克斯漂移效应以及垂向净环流是净输沙的主要贡献项。
6) ventral fin; ventral strake
垂直腹鳍
补充资料：垂向分层理论
垂向分层理论
stratification theory of grains in vertical direction
ehuix旧ng feneeng Iilun垂向分层理论(stratifieation theory of grainsin vertieal direetion)对重选过程中矿粒群在介质中作垂向分层运动机理的阐释。在重选设备内堆置或铺置的动态矿粒群称作床层。借助介质的垂直流动、沿斜面流动或作回转运动使床层松散，是粒群发生分层转移的先决条件。分层是指矿物粒群按密度差形成不同的矿物层;颗粒的粒度以及形状对分层也有重要影响。对于分层的发生机理，曾经有过多种见解，但归纳起来不外两类观点。一类是动力学分层学说，认为分层是按个别颗粒在介质中的运动差异发生的(见自由沉降速度差分层学说、干涉沉降速度差分层学说);另一类是静力学分层学说，认为分层是粒群整体的内在不平衡因素引发的(见悬浮体密度差分层学说、位能分层学说和重介质分层学说)。前一类学说强调了流体动力对颗粒运动的影响，而忽略了颗粒间的静力作用;后一类学说的立论观点则忽视了流体动力对分层的影响，而将床层内颗粒或颗粒群间的静力差异视为分层的决定性因素。 (孙玉波)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条