查询词典 rotational flow

It is shown that laser anemometry, as a non-intrusive anemometer, is more suitable and convenient than traditional instruments in application to rotational flow fields, especially to the flow within centrifugal impellers which have only small width of flow passage.

研究表明，激光测速仪作为一种先进的非接触式测速仪器在旋转流场特别是流道高度很小的离心旋转流场的研究中较之传统仪器更合适、更方便。

The calculation and analysis results were instructive to the optimization design of rotational flow self-priming pump.

计算及分析结果对旋流自吸泵性能优化设计具有一定的参考价值。

To all project practicality, the introduction is given to the operational characteristics, the methods for calculation and the researching actuality of the tail tunnels with sloping ceiling underground hydropower stations the Three Gorges. This paper has discussed in detail the characteristic method being the same with the compressive flow and the Priessmann solution being the same with the free-surface-pressure flow. And how to deal with boundary conditions has been expatiated. Also hydraulic transient process of tremendous load fluctuation in the tail tunnels with sloping ceiling has been numerical simulated and the Fortran program for numerical simulation has been given. The paper gain the maximal press for tail end of the shell, the maximal rising rate of rotational speed of generating set, the maximal vacuum degree for inlet of the tail tunnels and so on under 11 kinds conditions of tremendous load fluctuation. These conditions include the design conditions, the check conditions and the superposition conditions. Finally, the computing results have been analyzed and summarized. The end chapter is the general comment of the whole-length content and the describing of the intending view of researching.

本文以三峡右岸地下电站尾水洞设计为背景，从工程实际出发，阐述了变顶高尾水洞的工作特性、使用范围及其研究现状；详细论述了适用有压流的特征线法、适用明满交替流的普里斯曼解法等数学模型；边界条件的给定和明满交替流的计算方法；用Fonran语言编制了数值计算程序，对三峡右岸地下电站变顶高尾水洞的大波动工况进行了数值模拟，分别得出了在设计工况、校核工况和叠加工况下蜗壳末端最大压力上升值、机组最大转速上升值和尾水管进口最大真空度等重要参数；对数值计算结果进行了详细分析并得出了有价值的结论；最后展望了今后水电站变顶高尾水洞的研究方向。

The numerical results show that the secondary flow is enhanced in the cross section vertical to the mainstream for the revised burner, the gas tangential velocity component increases, and the rotational flow is intensified.

结果表明：改进后的燃烧器明显地增加了垂直于主流方向截面上的二次流，气体的切向分速度增大，旋流程度增强，能够有效地改善煤气和空气的混合效果。

The method is applicable for measuring vorticity of a strong rotational flow.

该方法适用于具有强旋转流动涡量的测量。

The eddy flow around waterspout of a tub and the cyclone in the bottom of a typhoon are convergent flow-in rotational flow .

水槽排水孔形成的旋涡和台风底层的气旋都是Coriolis力作用下的辐合流入层旋流，台风顶部是辐散流出层气旋。

It examine rotational speed through tachogenerator it sends processor to carry on corresponding adjustment make rotational speed strengthen by stability; Have corresponding excessive pessure, pass flow, owe pigeonholing and protected, strengthen systematic dependability.

并且通过测速发电机测得转速，送到处理器进行相应的调整，从而使转速稳定性增强；此外还有相应的过压、过流、欠压保护，增强系统的可靠性。

The relative leakage flow coefficient decreases with the increase of the rotational speed, and the leakage flow rate of the labyrinth seal at the high rotational speed of more than 6 000r/min decreases by 5.1%.

采用标准k-ε紊流模型和三维RANS方程求解方法，数值研究了密封间隙、压比、转速对典型迷宫密封泄漏特性的影响规律。

By analyzing the results of simulation and experiment, a series of new phenomena were found. There is an inner boundary within the rotational flow field of cyclone. The velocity head is zero on the inner boundary.

通过对仿真结果的分析，并结合试验数据，揭示出一系列新的现象，主要归纳为：旋风分离器内的旋转流场中存在一内边界，其速度头为零。

The electrical properties of single-walled carbon nanotube films in rotational flow of electrolyte solution have been studied.

最后对单壁碳纳米管膜在转动的电解质溶液中的电学性质进行了研究。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。