起动流速 meaning in English
competent velocity
Examples
- The experiment study on critical velocity of the rongchang fine coal powder
荣昌精煤粉起动流速试验研究 - The shape of model sand particle play an important role in submarine rest angle , starting speed , bulk specific weight and some other physical characters
摘要颗粒形貌对模型沙的水下休止角，起动流速、堆积密度等性能有显著影响。 - It is concluded that the critical velocity could be calculated by sharmov formula and the percentage of immobile particles of the bed should be considered for calculating the transport rate
结果表明，可以采用沙莫夫公式计算起动流速，计算输沙率应考虑床面不动颗粒所占比例的影响。 - And the relation between these velocity was analyzed at last . this is the conclusion : ( 1 ) the distribution of the velocity and concentration are get in the open channel flow and as the sewage flow is gravity flow , the equations is fit for this too . ( 2 ) generally speaking , the self - cleaning velocity should be the starting velocity , and it could fit for the self - cleaning target in limited sense theoretically , but when facing some higher requirement , it is not large enough
最后结合污水流动的最小设计流速与颗粒起动流速、临界不淤流速的关系进行了分析,结论如下: ( 1 )文中所得出的速度分布与浓度分布是在明渠两相流动情况下推得的,由于污水管道流动多为重力流,是明渠流中的一种,所以文中的分析在认识污水流动特性方面具有一定的参考价值。 - In this thesis , first , reasons and factors for the stability of loose rock dams were summarized according to the field surveys and certain expert ' s experiences . then , researches on block stability problems were reviewed , and according to the relationship between grain size and incipient velocity , it is found that the block weight is in direct proportion to 6 - 9 power of incipient velocity , and 50 % increase of the velocity will result in about 40 times change of the block weight . after that , experiments were conducted in a flume , focusing on the relationship between incipient velocity and some main factors including block weight , water depth over the dam , cross - section size , block material and river bed material
本文首先根据散抛石坝损毁情况的现场调查资料，结合有关专家多年的整治经验，总结出坝体的损毁原因及影响因素；对现有块体稳定性的研究成果进行回顾和总结，并针对散抛石坝的直接损毁现象，结合山区河流的水流、地形特点，利用块体粒径与起动流速的关系，提出块体稳定重量与起动流速高次方成正比的概念，流速50的增长可能导致块体稳定重量接近40倍的变化；通过二维变坡水槽试验，研究了坝体稳定的主要影响因素，包括块体重量、坝顶水深、断面尺寸、块体材料(块石和卵石两种) 、护底等，结果表明对于山区河流，试图仅仅通过增加坝体单个块体重量或断面尺寸来提高坝体稳定性效果甚微；最后，根据西部地区的自然、经济、交通等条件，提出可以采用柔性混凝土铰链体等一类整体性较好的护面层作为散抛石坝的防冲毁措施，以期取得良好的工程效果。