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Sun-Sheng Y.,Jiangsu University | Fan-Yu K.,Jiangsu University | Jian-Hui F.,Zhejiang Jiali Technology Co. | Ling X.,Jiangsu University
International Journal of Rotating Machinery | Year: 2012

Centrifugal pumps can be operated in reverse as small hydropower recovery turbines and are cheaper than bespoke turbines due to their ease of manufacture. Splitter blades technique is one of the techniques used in flow field optimization and performance enhancement of rotating machinery. To understand the effects of splitter blades to the steady and unsteady influence of PAT, numerical research was performed. 3D Navier-Stokes solver CFX was used in the performance prediction and analysis of PAT's performance. Results show that splitter blades have a positive impact on PAT's performance. With the increase of splitter blades, its required pressure head is dropped and its efficiency is increased. Unsteady pressure field analysis and comparison show that the unsteady pressure field within PAT is improved when splitter blades are added to impeller flow passage. To verify the accuracy of numerical prediction methods, an open PAT test rig was built at Jiangsu University. The PAT was manufactured and tested. Comparison between experimental and numerical results shows that the discrepancy between numerical and experimental results is acceptable. CFD can be used in the performance prediction and optimization of PAT. © 2012 Yang Sun-Sheng et al. Source

Qian Y.-K.,Zhejiang Jiali Technology Co.
Petrochemical Equipment | Year: 2011

It is introduced through research of high-power (more than 1 250 kW) self-lubricating bearing component structure for long-distance inline pump and high-speed lubricating bearing machining technology etc. A 2 000 kW self-lubricating inline pump was successfully developed and manufactured, though test verification the bearing component reached the expectation effect. The development experiences of this inline pump bearing component have a high value to extend. Source

Fu J.-H.,Zhejiang Jiali Technology Co. | Dong L.,Jiangsu University | Xiang Y.-T.,Zhejiang Jiali Technology Co. | Zhao J.-L.,Zhejiang Jiali Technology Co. | Xu S.-Q.,Zhejiang Jiali Technology Co.
Petrochemical Equipment | Year: 2015

Using the commonly used methods of numerical simulation including the velocity and pressure coupled algorithm, inlet and outlet boundary condition, convergence precision as well as turbulence model, an impeller and volute coupled numerical simulation of internal flow in 4 different specific speed horizontal split-case oil transport pumps at the design point was carried out by Fluent. Based on the numerical simulation results, a contrast study was undertaken to investigate the key factors of numerical simulation of horizontal split-case oil transport pump. The research shows that the good simulation results was quickly obtained when the simulation model is set as follows: the turbulent model is standard k-ε model, the convergence precision is 10-4, the velocity and pressure coupled algorithm is SIMPLEC algorithm as well as the inlet and outlet boundary is velocity inlet and free outflow. Source

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