A method to improve the efficiency of the turbine through-flow passage using the technique of boundary layer suction is introduced.
介绍采用边界层抽吸提高透平通流部分效率的方法。
With the calculations of boundary layer and turbine through-flow, the rational suction flow rate and main structure size of the turbine thrugh-flow passage are determined.
通过边界层计算和透平级通流计算，确定合理的抽吸流量和相关的透平级通流部分主要结构尺寸，分析对透平级效率及热力特性的影响。
The physical simulation results on the process of gas migration and accumulation in Kela 2 gas-field indicate that the fault below salt near trap is effective migrating passage of natural gas, whereas the fault cutting salt is noneffective migrating passage of natural gas. It also indicates that the natural gas migration along fault zone is characterized by high speed and high efficiency under the suction role of seismic pumping, and natural gas can migration and accumulation at large scale in the short time of faulting.
通过克拉2气田天然气运聚成藏过程物理模拟实验结果表明，紧邻圈闭的盐下断裂为有效的天然气运移通道，穿盐断裂为无效的天然气运移通道，天然气在地震泵抽吸作用下沿断裂运移速度快、效率高，在断裂活动的短时间内可以大规模运聚成藏。
Comparison of vacuum is made between the single and double suction vacuum pump, between the unit with balance passage and that without balance passage.
对单级与双级抽气开平衡通道与不开平衡通道的真空泵的真空度进行了对比分析。
The present invention relates to spinnning machine, especially ring spinning frame with many spinning units. Each of the said spinning units has a drafting unit between the fiber supplier and a spinning device; and most of the said spinning units has one suction pipe between the fiber supplier and one spinning device; and each suction pipe is connected to at least one common suction passage connected to one son pressure source.
本发明涉及一具有许多纺纱单元的纺纱机，特别是环锭细纱机，其中每个所述单元在一纤维供应与一纺纱装置之间具有一牵伸单元，并其中在至少多数该单元上有一抽吸管在纤维供应与纺纱装置之间被引导，每一所述抽吸管连接在与一子气压源相连的至少一个共同抽吸通道上。
In design condition, the flow blockage, loss, turbulence and noise at the exit focus mainly in the tip mid-passage, wake and the corner between the hub and the suction surface; with the flow downstream, the tip leakage vortex is farther away from the suction surface, while both velocity and turbulence in radial direction rapidly decay.
设计状态转子出口流动阻塞、损失、高水平紊流脉动及噪声主要发生在叶尖通道中部、尾迹和叶根吸力面角区；在下游，通道内径向流动减弱，泄漏涡更加远离吸力面，径向速度脉动沿流向衰减很快。
This reduces the flow passage area and, therefore, lowers the suction performance.
这就降低了通流部分地区，因此，降低吸力的表现。
Through an analysis on mud-clogging mechanism of suction nozzles on wet type sweeper, a concept is suggested, that water ratio in dust nearing the wall of suction nozzle duct should be decreased so the mud stickiness can be controlled under a critical value and not sticking to the duct wall whereas water ratio in central dust passage of the duct is properly increased to satisfy effective dust absorbing. On the basis of the concept, a water spraying device is designed with improvement for suction nozzles. In the device, the water hole numbers, diameters and distribution along the nozzle circumference as well as initial direction of water spraying are all determined according to concrete suction nozzle structures.
通过对湿扫型道路清扫车的吸嘴易被泥土堵塞的机理分析，提出降低吸嘴流道近壁的尘土的含水率，控制泥块的黏性处于临界黏性以下，使泥块不黏附于流道壁面；而将吸嘴流道中心部位的尘土的含水率适当加大，以满足有效压尘的解决思路，并根据这种思路改进设计了一种吸嘴喷水装置，按不同吸嘴的具体结构确定孔数、孔径、孔沿圆周的分布规律和喷水的初始方向等要素。
The outlet of the introduction passage is located closer to the valve plate than to the wall of the suction chamber.
导入通道出口与阀片的距离比与吸入腔壁的距离小。
Compared the pressure distributions of the air passage before and after improvement, it argues that after improvement the pressure loss is decreased, and the suction is more uniform.
将其模拟结果与前面章节所得到的改进前的风道分析结果进行对比，证明改进后的风道能够有效的降低压力损失，同时使吸风相对均匀。
Through experiments, four heat transfer correlations for three local areas and for whole passage in a suction valve have been developed.
因而，本文应用热&质比拟萘升华方法，通过实验，成功地建立了吸气阀道内部三个不同部分的换热关系式，并导出了描写整个气阀通道的传热关系式。
When the impacting point of shock on suction surface locates behind the minimum pressure, secondary leakage flow distorts the passage shock directly, otherwise, leading edge leakage flow effects much upon the passage shock wave.
当激波位置在该点之后时，二次漏流直接冲击激波结构；当激波位置在该点之前时，激波结构基本只受前缘漏流的影响。
Flow field of centrifugal pump (Pump flow passage includes suction pipe, impeller and volute casing.) was obtained by solving the Reynolds average Navier-Stokes equation.
通过求解包括进水管、叶轮、泵体等过流部件在内的水泵流道内的三维稳定雷诺平均Navier-Stokes方程，获得水泵内部的流场分布特征。
Effect of Rib Turbulator Orientation on the Discharge Coefficient of Suction Hole in the Internal Passage
带肋壁与出流孔内流通道中肋角度对流量系数的影响
In comparison with these of the straight cascade the blade positively curving reduces the quantity of the critical points, eliminates the upper passage vortex, and transform the closed separated flow of the secondary vortex along the blade tip suction side into the open separated flow.
与直叶栅比较，叶片正弯明显减少了壁面与横截面流场中奇点的数量，消除了上通道涡，并使叶顶吸力边的二次涡分离流动由闭式分离转变为开式分离。
The results obtained describe the flow structure in the corner between the end-wall and blade suction surface in detail. Besides a passage vortex with in the passage, there exist a shed corner vortex pair and a secondary vortex pair in the corner.
结果表明：叶栅通道内不仅存在通道涡，而且在吸力面与端壁形成的角区内存在一角区脱落涡对和一二次涡对。
The experimental results showed that a little vortex in opposite direction of rotation emerged as the passage vortex existed at the root of suction surface. The vortex was induced mainly by mixing between mainstream and injecting air, and resulted from formation of kidney-shaped vortex.
结果表明，冷气射流与燃气主流的掺混以及卵型涡的形成，使得吸力面根部出现了与通道涡旋向相反的涡系；
The secondary vortex of flow passage changes near the suction surface to away from the suction surface, then the other. The incidence of leakage vortex is recurring process that from weak to strong, and then from strong to weak.
通道内的二次涡则经历了靠近吸力面到远离吸力面再到靠近吸力面的过程；二次涡的影响范围经历了从弱变强再从强到弱的周期性过程。
The distributions of pressure drop coefficients were measured along the passage with Reynolds numbers changing from 40000 to 80000 and suction ratios (SR) changing from 0.30 to 0.60. Influences of Reynolds number and suction ratio on pressure loss were studied.
在内流通道进口雷诺数为40000～80000，通道总出流比为030～060的范围内测量了通道压力损失系数Cp的分布，分析了通道进口雷诺数和通道总出流比对Cp的影响规律。
The calculation results of a straight and a positively curved blade flow field show that the positively curved blades can create in the flow passage, especially at the suction side surface, a C shaped static pressure distribution. The latter effectively suppresses radial secondary flows.
计算了直叶片及正弯叶片流场，计算结果表明叶片正弯曲在流道内，尤其是吸力面表面建立起C型静压分布，抑制了径向二次流动；