The results show that an eddy surrounding the main stream of the multiple jets exists and forms several strong shear flows and enhances the effect of energy dissipation 研究结果表明：多股多层淹没射流利用在射流轴线周围所形成的强剪切、三维立体漩滚的剧烈混掺来实现消能，消能率较高，且在平面上没有形成明显的、贯穿的立轴漩涡。
Cooperation has been the enterprise : guangzhou honda , bank of china , china unicom , china telecom , china merchants bank , and mengniu , wang ji , china netcom , samsung mobile phones , electrical appliances , etc . can rate 一直合作服务的企业：广州本田，中国银行，中国联通，中国电信，招商银行，蒙牛，王老吉，中国网通，三星手机，能率电器等等。
( 1 ) it was found from the obtained results that increasing of flux will led to decrease in froude no . of the following water at the shrinking section which will reduce rate of disspated energy , this will make the protection of dam surface more difficult 主要结论如下;随着流量的增加，消力池收缩断面弗劳德数减小，消力池的消能率减小。坝面平均流速增大，坝面的防护难度增加。
The main reason of the stepped spillway having greater energy dissipation is tha there is big horizontal vortex in the inner angel of the steps and it makes momenbo exchange with outer mainstream then accelerates the theulence in the water 由于阶梯的存在，使得水流在阶梯凹角内产生强烈的水平横轴旋涡，旋滚水流与外部主流之间不断进行的动量交换加剧了水流内部的紊动，从而使阶梯溢流坝有较高的消能率。
The results show that multi - lever and multi - strand horizontal submerged jets are a new energy dissipation type and have better stability of flow patter , lower velocity in the slab and higher dissipated energy rate than the single - lever and the multi - strand horizontal submerged jets 研究表明，多股多层水平淹没射流较单层多股水平淹没射流流态稳定性好、临底流速低、消能率高，是一种高效的新型消能方式。
At present , unipoint screws are widely used in a host of fields including construction - related , metal parts assembly , automotive , home appliances , etc . wherever they are used , unipoint screws enable a remarkable improvement in working efficiency while helping to save energy 现在，尖头被广泛使用于建设方面，金属部件的组装，汽车，家电等领域。在各个领域迅速提高了作业能率并在节省人力方面做出了很大的贡献。
Abstract : through study on energy dissipation of goupitang project on the wu - jiang river , the velocity field in the water cushion pool downstream ski - jump or drop was measured by hot - film anemometers on a fine model with scale 1 380 文摘:结合乌江构皮滩水利枢纽工程消能问题研究,用热膜流速仪在比尺为1 380的精细模型上量测了拱坝挑跌流在水垫塘内的流速场,并由试验成果分析了淹没射流在水垫塘内的消能过程,计算了消能率。
For the larger area contraction ratio , the flow condition becomes more complicated , the discharge of the tunnel and the change of the negative pressure in the cavity pocket will be reduced , but the cavity diameter of the level rotary cavity flow and the dissipation ratio of the system will be increased 面积收缩率较大时，流态变化复杂，泄流量和环流空腔内的负压的变化减小，但空腔环流的空腔直径和泄洪洞的消能率增大。
Through the analysis and discussion for the simulation results , the energy dissipation mechanism of the stepped spillway is preliminarily made clear and some engineering measures for increasing the energy dissipation ratio are proposed , and some useful and practical conclusions are obtained 通过对计算成果的分析和讨论，初步弄清了影响阶梯坝面消能率的机理，并提出了增大坝面消能率的工程措施，得到了一些具有实用价值的结论。
However , because of the particularity that is hydraulic jump , before jumping , when water ' s froude number is less than four point five , the damping ratio is so low that energy dissipator ' s lower river produce serious flushing , so much so that it may threaten energy dissipation structure ' s safty 然而，因为水跃本身又具有其特殊性，在跃前水流佛汝德数( froudenumber )小于4 . 5时，消能率很低，致使消能工下游产生严重的冲刷，甚至危及消能建筑物本身的安全。
