In this paper, a simulation-based method is proposed for optimal placement of vibration sensors for the purpose of fault detection in a centrifugal pump. The centrifugal pump is modeled to investigate the effect of vane tip fault on fluid flow patterns numerically. Pressure pulsations are investigated at different locations at the inner surface of the pump before and after the presence of the f...

T. IIZUKA and K. IKEDA Tochigi Works Hitachi, Ltd. Shimotsuga-gun, Tochigi-ken, Japan, 329-44 Since applications of rotary compressors driven by inverter motors have become more widespread, l~bricating problems with the sliding parts have been appearing. The sliding parts require sufficient antiseizure and wear-resistant properties under the boundary lubricating conditions. The authors have dev...

Regulation structures such as submerged vane are needed to reduce and eliminate environmental damage due increased flooding in rivers. In particular, scours on the outer bank flow velocities cause river bed change deteriorate. this study, effect was investigated experimentally by using 3-array areas close bank. The experimental results were performed open channel setup. Computational Fluid Dyna...

The mixing of oil and gas forms the foundation deep-sea extraction transportation. However, traditional conveying equipment has low efficiency high failure rates. In this study, a spiral axial flow liquid multiphase pump was used as base model. Eulerian model RNG turbulence were for numerical simulations to analyze internal field pump. A modification scheme proposed twist airfoil shape create t...