入口侧 meaning in Chinese
entrance side
entry side
inlet side
Examples
- 5 . the numerical simulation of the axial vortex movement in the inlet side of the pump system with the method of discrete vortex provided a new way for hydromechanical characteristics of a pump system
用离散涡方法计算涡系位置的演化模拟泵入口侧涡量场的轴向涡流运动，为研究泵系统入流侧涡量场特性提供了一种定量研究方法。 - The transient continuously distributive vortex can be replaced by a number of discrete point vortexes . the trajectory of vortex movement was computed with the method of discrete vortex and the axial vortex movement in the inlet side of the pump system was simulated
将泵入口侧连续分布的涡量场离散成有限数目的离散涡，用离散涡方法计算涡系位置的演化，模拟泵入口涡量场的轴向涡流运动。 - On the basis of the experiment , this thesis furthered the research on vortex in the inlet side of the pump system with the method of numerical calculation , and offered its axial vortex line , and contrasted this line with the diagrammatized vortex line
本文在实验基础上，通过数值计算方法对泵入口侧涡量场作了进一步研究，绘出了泵入口侧涡量场地轴向涡线，并与图解法绘制地涡线进行了对比。 - For shutters , the results show : 1 ) according to the formula p = , the theoretical value of is calculated by the effective velocity of the flow , and its engineering value is calculated by the arriving velocity of the flow , the relationship between the theoretical value of and its engineering value is 2 ) the smaller value of declining angle will result in the smaller pressure loss and smaller outlet velocities . as a result , the declining angle of 30 掳 or less is recommended in some places which need small wind velocity , such as broadcasting studio and library , and the declining angle of 45 掳 or less is recommended in places which need big wind velocity , such as cinema and office ; 3 ) the larger value of ratio between the wide of the shutter b and the space between two boards h ( b / h ) will result in the larger pressure loss and smaller outlet velocities . the range of b / h from 0 . 8 to 2 . 0 and the optimum value 1 . 2 is recommended ; 4 ) the range of b from 10 mm to 50 nun and the optimum value 40 mm is recommended ; 5 ) the proper thickness of the boards 8 of the shutters is 1 . 5 mm ; 6 ) cuneiform boards should replace the rectangle inlet boards of the shutters in order to obtain better ventilation
数值模拟采用fluent软件，计算结果用excel进行处理，通过对大量数值工况进行数值模拟计算，结果表明：对于单侧百叶风口，计算表明： 1 )对于公式p = ( ~ 2 ) 2 ，的理论计算值中定义为流体流经百叶风口内部时的速度，即有效速度，而工程上常使用流体的来流速度来计算，计算表明，的理论计算值与工程应用值的关系为( _ (理论) ) ( _ (工程) ) = 0 . 813 ； 2 )当来流速度一定时，挡板倾斜角度越小，压力损失越小、出口速度越小；因此在要求进口风速比较小的场所，如播音室、图书馆等，宜采用挡板角度30的百叶风口；在要求进口风速比较大的场所，如电影院、办公室等，百叶挡板的角度应选45 ； 3 )当来流速度一定时，百叶挡板的挡板宽度b与挡板间距h的比值b h越大，压力损失越大，出口速度越小，计算表明，鉴于压力损失、出口风速、板间形成涡流区的大小，百叶挡板的b h值取0 . 8到2 . 0之间， b h = 1 . 2为最佳值； 4 )当来流速度一定时，在计算的条件下，当百叶挡板宽度b = 40mm时，百叶挡板的阻力系数最小，考虑到涡流区等的影响，建议选用10mm b 50mm的百叶挡板；西安建筑科技大学硕士学位论文5 )百叶挡板的厚度取为1 . sinln为好; 6 )百叶挡板的入口侧可选用具有倾斜度的楔形挡板来代替矩形挡板，利用其较好的导流作用，可得到更好的出流效果。 - The reason that the noise is lower with inclining tongue is : 1 ) both the radius of the tongue and the gap between the tongue and the blade are changed across the wideth ; 2 ) the phase angle between blade and the tongue is changed across the wideth , therefore the peak value of the noise do not appear at the same time , so the peak value of the noise with inclining tongue is much lower than the straight one . the influence of the expanded angle of the shell of the fan on the noise was invested experimentally , and the optimal angle was got
倾斜蜗舌降噪的主要原因是：一是改变了从气流入口侧到风机轮盘的蜗舌间隙和蜗舌半径；二是改变了叶轮与蜗舌非定常相互作用的相位差，使其产生噪声也有相位差，迭加的结果进一步降低了噪声。另外，试验研究了不同蜗壳扩张角对风机噪声及效率的影响规律，蜗壳扩张角选择当否，对效率和噪声影响较大。