助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   临界雷诺 的翻译结果: 查询用时:0.016秒
图标索引 在分类学科中查询
所有学科
力学
航空航天科学与工程
动力工程
更多类别查询

图标索引 历史查询
 

临界雷诺
相关语句
  critical reynolds
     Based on the non-Newtonian stress formula,Kármán logarithm distribution and Nikuradse experiment,the authors defined the characteristic Reynolds number,generalized characteristic Reynolds number,and the critical Reynolds number in laminar and turbulent flow.
     基于非牛顿流的切应力本构式、卡门对数分布与尼古拉兹实验,推导了速度分布、阻力系数与平均速度及雷诺准则的关系式,定义了特征雷诺数、特征广义雷诺数及其表达式,分析给出了层流、紊流的临界雷诺数,临界特征广义雷诺数为215。
短句来源
     The results show that 1)the response amplitude of thedownstream cylinder is larger than that of the upstream one,2)the responses in critical Reynolds numbersare different from those in subcritical Reynolds numbers,and 3)There are abrupt changes of the dynamicresponses between L/D≤3.0 and L/D≥4.0.
     实验结果表明:下游柱振动比上游柱大,在临界雷诺数区中,圆柱动态响应与亚临界雷诺数区中的动态响应不同,在3.0
短句来源
     The Experimental Study of Critical Reynolds Number on Low-Velocity Non-Darcy Flow
     低速非达西流临界雷诺数实验研究
短句来源
     The critical Reynolds number for flow transition from laminar flow to turbulent flow is 255.
     迷宫式流道内部流体流动的雷诺数Re为105~930,层流和紊流的流态转捩的临界雷诺数比常规尺度流道的值要小,低于255。
短句来源
     A new concept about the critical Reynolds number of turbine flowmeters is also proposed in this paper.
     文中还提出了关于涡轮流量计临界雷诺数Re_(c1)的新概念。
短句来源
更多       
  “临界雷诺”译为未确定词的双语例句
     The phenomenon of drag reduction of turbulence water flow added with surfactant(CTAC+NaSal) was investigated experimentally in the work. The conditions of temperature, concentration of surfactant and Reynolds number that drag reduction may occur were studied. By using LDV,the turbulence properties of the flow in a two-dimensional channel were measured.
     针对在水中添加界面活性剂 (CTAC +NaSal)后 ,湍流流动阻力大幅度下降的现象 ,用激光多谱勒测速仪在二维水槽中对湍流特性进行了测量 ,研究并阐述了这种弱阻力湍流存在的条件 ,以及与雷诺数、温度、浓度的关系 ,得出了一些重要的结论 :添加界面活性剂的水溶液呈现弱阻力湍流的条件是流动雷诺数低于某个临界雷诺数 ;
短句来源
     8. The factors on the turbulent entrance length were analysed, based on the variable Recr, a new empirical formula was developed for the turbulent entrance length in a pipe flow.
     8.详细分析了管流湍流人口长度的影响因素,提出以临界雷诺数为基础变量的新湍流入口长度经验公式。
短句来源
     ①the value of higher than 4th order derivatives at the two sides of interface film has little effect on the critical unstable Reynolds number.
     研究得出:①在液膜两 边上黏性系数4阶以上导数值几乎不影响流动临界雷诺数;
短句来源
     Determinant of Flow Separation and Critical Reynold Number in Local Strictured Blood Vessel
     局部狭窄血管中流动分离和临界雷诺数的判定
短句来源
     The results indicate that thecritical Reynolds number transited from the lamilar flow to turbulent flow is equal to 1400~1800under the experimental conditions for water flow in the microchannels.
     结果表明,试验条件下微槽内水流动中从层流向湍流转变的临界雷诺数Rec=1400~1800。
短句来源
更多       
  相似匹配句对
     The Determination on the Critical Reynolds Number of the Smooth Pipe
     水力光滑圆管临界雷诺数的确定
短句来源
     RENAULT
     雷诺幻景
短句来源
     ,Reynolds stress(?) ,(?)
     ,雷诺应力(?)
短句来源
     (M, H)-Critical Matrices
     (M,H)-临界矩阵
短句来源
     Application of Polymers in Calculating Reynolds Number, Critical Flow Rate and Flow Velocity in Annulus
     聚合物在环形空间中雷诺数和临界流速、流量的计算
短句来源
查询“临界雷诺”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  critical reynolds
It was shown that, at some critical Reynolds number, backflows are initiated near the channel walls.
      
The dependence of the critical Reynolds number on the diverging angle of the channel and on the properties of a liquid in a strong electric field was determined.
      
The applied electric field increases the critical Reynolds number, which provides a means of controlling the regime of the considered flow using electrical methods.
      
Since the development of this sort of disturbance depends only weakly on the form of the velocity profile in the boundary layer, a marked change of the viscosity had little effect on the critical Reynolds number.
      
It is shown that for each given layer thickness there is a sequence of critical Reynolds numbers above which the motion is unstable.
      
更多          


~~

現有波浪的紊动理論多借鑑于紊动水流的半經驗理論,把波浪运动簡化为恆定的水平水流,因而改变了波浪运动的特点,忽略了波浪垂直运动分速对紊动运动的影响,这是不够合理的。本文根据波浪流态的定性观察試驗,初步明确了波动水體內部流态沿深分区以及試驗室內的波浪临界雷諾数,並从波浪双向周期軌道运动的特点出发,推导了深水摆綫波紊动要素的計算公式,並用現場資料进行了驗証。最后还将深水波的紊动要素用鏡面映象的原理推广到浅水波紊动要素的計算。

The formation of atherosclerosis in a curved aorta is closely related to the existence of the separated vortex region. This paper deals with the steady laminar motion of an incompressible Newtonian fluid through a curved tube with circular cross-section whose curvature is small and whose curvature gradient is not too large. Using the momentum integral method as well as the approximation of quasi-constant curvature and equation, which determine the location of separation and the reattachment, were derived from...

The formation of atherosclerosis in a curved aorta is closely related to the existence of the separated vortex region. This paper deals with the steady laminar motion of an incompressible Newtonian fluid through a curved tube with circular cross-section whose curvature is small and whose curvature gradient is not too large. Using the momentum integral method as well as the approximation of quasi-constant curvature and equation, which determine the location of separation and the reattachment, were derived from that which is concerned. From this equation the earliest separated point and corresponding critical Reynolds number are obtained, and the relation between the position of separation and reattachment as well as Reynolds number Re for the different azimuthal angle is revealed. It is concluded that the separation at first emerges at the position whose curvature gradient has the maximum absolute value. With increasing Re, the separated region is extended in the direction of the mainstream, the azimuthal angle and the radius vector, and a three-dimensional separated vortex, which gradually enlarges in all three directions with increase of Reynolds number, is thus formed. The theoretical results also very clearly demonstrate the following striking experimental fact. If the symmetrical curved tube exhibits a separated vortex at the outside of the upstream, then it must have another symmetrical one at the inside of the downstream.

弯曲血管中动脉粥状硬化和涡旋区的产生密切相关.本文在牛顿粘性不可压缩流体作定常层流运动的前提下,采用动量积分关系式方法和准常曲率的概念.对曲率小,曲率变化不太大的弯曲血管,得到了确定分离点和再附点位置的方程.据此可确定最早分离的地方及对应的临界雷诺数以及对不同方位角分离点和再附点依赖于雷诺数R_e的曲线.分析所得结果表明,分离首先发生在曲率变化最剧烈的最外侧(或最内侧),随着R_e数的增加分离区向主流的上下游.方位角和矢径方向延伸从而形成三维的分离泡,分离泡在三个方向上的尺寸随着R_e数的增加不断地扩大本文所得的结果还从理论上阐明了实验观察到的下述饶有趣味的事实:对于对称的弯曲血管,如果在上游外侧有一分离泡,则在下游内侧与其对称的地方必有另一分离泡存在.

Experimental data and procedures for predicting the local and average heat transfer coefficient for film condensation of downward steam flow inside a verticaltube at around atmospheric pressure are presented in this paper. Testswere conducted in a 1965mm long, 14mm inside diameter carbonsteel tube with an inlet steam quality x_1=1 and outlet quality x_2=0~0.209.The range of film Reynolds number in test was 350~2611.The experimental results indicated that the critical film Reynolds number from laminar to transition...

Experimental data and procedures for predicting the local and average heat transfer coefficient for film condensation of downward steam flow inside a verticaltube at around atmospheric pressure are presented in this paper. Testswere conducted in a 1965mm long, 14mm inside diameter carbonsteel tube with an inlet steam quality x_1=1 and outlet quality x_2=0~0.209.The range of film Reynolds number in test was 350~2611.The experimental results indicated that the critical film Reynolds number from laminar to transition zone was found to be 800. Based upon the theoretical analysis and experimental data the authors developed the semiempirical formulas for calculating the local and average heat transfer coefficients in laminar and transition zones as follows.The errors between the predicted and measured values were below 18%. In the present paper, comparison has been made with some other works.

本文对于大气压力附近向下流动的水蒸汽在立管内膜状冷凝时的试验数据进行了整理,并得到了局部和平均放热系数。试验在内径14mm,长1965mm的碳钢管内进行,蒸汽入口干度x_1=1,蒸汽出口干度x_2=0~0.209。试验中雷诺数范围为350~2611。试验结果给出了由层流区到过渡区的临界雷诺数为800。根据理论分析和试验数据,作者提出了层流区和过渡区内的局部及平均放热系数的半经验计算式。计算值和测量值之间的误差小于18%。本文与其他文献进行了比较。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关临界雷诺的内容
在知识搜索中查有关临界雷诺的内容
在数字搜索中查有关临界雷诺的内容
在概念知识元中查有关临界雷诺的内容
在学术趋势中查有关临界雷诺的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社