| 1. | It shows that the aeration influence is not neglect after correcting between the theory value and practice calculate value
考虑掺气后的消能率实测计算值与理论计算值吻合较好，这表明掺气的影响是不可忽略的。 |
| 2. | At the toe of thc stepped spillway if exchange a series of steps for arc section , the highe enersy dissipation can be got bu the pressure is higher in downstream icction
在坝趾处，不设反弧段比设反弧段时的消能率高，但坝下水平段的压强值较大。 |
| 3. | In the light of the study result that the energy dissipation ratio is higher as the spillway slope is gentle , to applied stepped spillway to overflow earth - rock dams with a certain height is proposed
根据坝坡较缓时，阶梯的消能率较高的研究成果，提出把阶梯溢流应用于一定高度过水土石坝。 |
| 4. | To use the athwart gradient protection which takes the end of dam as the datum mark will reduce the digging depth of the stilling basins is reducing , and increase the energy dissipation rate
采用以坝体末端为基准面的坝体逆坡防护时，消力池挖深减小，消能率提高，坝面平均流速减小，坝区防护难度降低。 |
| 5. | 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。 |
| 6. | ( 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。 |
| 7. | 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。 |
| 8. | 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。 |
| 9. | 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。 |
| 10. | 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。 |
