外文翻譯---基于內(nèi)流場的數(shù)值模擬的磁力驅(qū)動泵在不同轉(zhuǎn)速下的性能研究(已修改)
2025-06-21 15:42 本頁面
【正文】 英文原文 Performance Study Based on Inner Flow Field Numerical Simulation of Magic Drive Pumps with Different Rotate Speeds Abstract: Magic drive pump has gotten great achievement and has been widely used in some special fields. Currently, the researcheson magic drive pump have focused on hydraulic design, bearing, axial force in China, and a new magic drive pump with low flowand high head have been developed overseas. However, low efficiency and large size are the mon disadvantages for the magicdrive pump. In order to study the performance of highspeed magic drive pump, FLUENT was used to simulate the inner flow fieldof magic drive pumps with different rotate speeds, and get velocity and pressure distributions of inner flow field. According toanalysis the changes of velocity and pressure to ensure the stable operation of pump and avoid cavitation. Based on the analysis ofvelocity and pressure, this paper presents the pump efficiency of magic drive pumps with different rotated speeds by calculating thepower loss in impeller and volute, hydraulic loss, volumetric loss, mechanical loss and discussing the different reasons of power lossbetween the magic drive pumps with different rotated speeds. In addition, the magic drive pumps were tested in a closed testingsystem. Pressure sensors were set in inlet and outlet of magic drive pumps to get the pressure and the head。 The results of simulation and test were similar,which shows that the method of simulation is feasible. The proposed research provides the instruction to design highspeed magicdrive pump. Key words: magic drive pump, simulation, power loss, pump efficiency. Magic drive pumps are currently used in petrol andchemical industries to pump toxic, explosive, corrosive andexpensive fluid. Highspeed magic drive pump will havean extensive prospect with the application of frequencyconversion technology and the requirement of environmental protection. Currently, studies on the design of magic drive pump,bearing, axial force and magic coupling have been goingon for several years, and some achievements have been University developed the magic drive pump withhigh power, which provided the design method of magic drive pump. Kong Fnayu developed a new bearing material FC50[4–5], which is well in wearable performance and a new way to balance the axial force by using cooling cycle fluid which almost eliminate axial force[6]. Refs. [7–11] use ANSYS to simulate the efficiency of magic coupling, which improves the efficiency of magic drive pump. RIKKE, et al[12], researched into the distribution of flow field by using large eddy simulation to simulate the inner flow field in impeller under different operating [13] investigated into the distributions of pressure and velocity when impeller and pumping chamber were in different relative positions by simulating the unsteady flow in centrifugal pump. BENRA[14] proved that the method of simulation was feasible by simulating velocity distribution in singleimpeller centrifugal pump and paring simulation with testing result of PIV. Many researchers have researched and analyzed inner flow field in the pump by using putational fluid dynamics(CFD). In order to do further research on the performance of magic drive pump, this paper presents the simulation of 3D turbulent model inside of magic drive pumps with different rotated speeds. The distributions of pressure and velocity in impeller and volute were got。 head efficiency and power losses in normalspeed and highspeed magic drive pumps were discussed. The parison of simulation with experiment showed that the method of s
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