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- NUMERICAL SIMULATION OF BOUNDARY LAYER ON BLADE SURFACE UNDER DIFFERENT INLET FLOW CONDITIONS? 来流条件对叶片表面附面层转捩影响的数值模拟研究?
- The corrosion pits on the blade surface contributed to such failure as an additive factor. 叶片表面的腐蚀坑是其疲劳断裂的另一促进因素。
- Stem, abaxial leaf blade surface, and peduncle puberulent or pubescent to villous; bracts 2-4 mm; calyx segments 3.5-6 mm; staminodes 2. 茎，背面的叶片表面和花序梗被微柔毛的或短柔毛到具长柔毛；苞片2-4毫米；花萼裂片3.;5-6毫米；退化雄蕊2。(4
- Due to the effects of inertia and diffusion, the droplets impact to the blades and deposit on the blade surface to form water film, when the wet steam flows in cascade passage. 湿蒸汽在叶栅通道内运动时，由于惯性和扩散作用，水滴会撞击并沉积在叶片表面上，形成水膜。
- The Film cooling effectiveness on the blade surface were measured in the cases of mainstream Reynolds number from 250000 to 450000 and blowing ratio from 0.5 to 2.5. 实验的参数变化范围是：基于叶片弦长的来流雷诺数250000~450000，吹风比0.;5~2
- In practice,square stock was electrochemically machined to form a blade surface,and checked the blade by a special measuring device,satisfactory results were obtained. 实践证明在该机床上电解加工方料毛坯,加工出的叶片经专用量具检测,叶片型面精度符合要求。
- It is one of the efficient approaches that the air-film is accreted on blade surface of operative marine propeller for improving cavitation characteristics. 摘要在船用螺旋桨桨叶表面充气以形成气膜是改善其空泡特性的有效方法之一。
- Experiment of NC generative ultrasonic grinding of ceramic blade surface was carried out with the grinding spindle assembly,the experimental results show t... 采用研制的磨轮主轴部件进行了数控展成超声磨削陶瓷直纹面工艺试验,试验结果表明主轴部件及驱动控制系统运行良好。
- Comparison between S2 calculation, S1 calculation and FLUENT calculation illustrated that the mass flow and efficiency tally well, so does the distribution of mach number along the blade surface. 为校验所用S2正问题计算和S1流面计算程序,对设计状态进行了S2正问题计算、S1流面计算及FLUENT计算,总参数如流量、效率等吻合较好,叶表马赫数分布趋势也很相似。
- On basis of the linearized Euler equation,the sound pressure is correlated with the unsteady pressure distributions on stator blade surface in the form of the Fredholm integral equation of the first kind. 具体从线化欧拉方程出发 ,将空间有限点的声压与静叶表面的非定常压力分布关联成第一类 Fredholm积分方程的形式。
- In order to solve the problem of machining the blade surface of an integral impeller,the paper carried out the research on the mechanisms of electrochemical contour evolution grinding(ECEG). 介绍了以四轴联动方式精密展成电解加工直纹面叶型整体叶轮叶片型面时,叶片型面的拟合方法、展成运动的组成以及展成运动轨迹的计算方法。
- Xiang Anding,Zhu Huiren,Liu Songling,et al.Discharge coefficient measurements for film cooling holes on blade surface in a turbine cascade[J].Journal of Propulsion Technology,2003,24(3):216-218. [6]向安定;朱惠人;刘松龄;等.;涡轮导向叶片表面气膜孔流量系数的实验研究[J]
- The flow field parameter distribution can be affected more in upper stream, especially near the leading edge area while the mach number distribution of the upstream blade surface is affected little. 对上游进口段，特别是靠近叶片前缘区域流场参数分布有较大影响，但对于上游叶片表面马赫数影响不大。
- According to the thickness of the blade, variable distance offset curves of the shroud camber line and hub camber line were acquired, then the blade surface can be expressed by ruled surface. 按照叶片的厚度做盖盘曲线和轴盘曲线的变距偏置曲线,得到叶片曲面的直纹化表达式;
- The numerical simulation technique is used to investigating the isentropic Mach number distribution on the different swept height blade surfaces of a turbine last stage blades. 采用数值模拟技术详细地研究了不同掠高的某蒸汽轮机末级前掠叶片表面等熵马赫数的分布。
- Samara glabrous; leaf blade surfaces smooth and glabrous with tufted hairs on veins, base oblique, apex acuminate to narrowly acuminate. 翅果无毛叶片表面平滑和无毛的具丛生的毛在脉上，基部偏斜，先端渐尖到狭渐尖。
- The invader thrust the blade of his bayonet into the woman's heart. 侵略兵把刺刀的刀身刺入那个妇人的心脏。
- The 3D-flow fields near the endwall of the cascade,the flows over blade surfaces and endwall surface are visualized by using cotto n thread and floating small ball. 分别采用线簇和小球浮动法对五个雷诺数下的叶栅端壁区三维流场、叶片表面和端壁表面的流动进行了显示。
- A rabbit get catch in the blade of the reaper. 一只兔子被卷到收割机的刀刃中去了。
- The gas bubbled to the surface of the water. 气体变成气泡升上水面。
