The pressure fluctuation characteristics of a rim driven propulsion pump are studied by an experimental method firstly, and then its unsteady inner flow is numerical simulation to reveal the generating mechanism fluctuation. In experiment, monitoring point was set in downstream region with distance 1D (D, Diameter impeller) impeller. point’s dominant frequencies within low frequency band 1APF (...

in this research, the effect of micro turbulence on the flotation rate of quartz particles was investigated. the maximum particle reynolds number (rep) was obtained at 60.25 with a particle size of -500+420 µm, impeller speed of 900 rpm, bubble surface area flux of 10.21 1/s and micro scale turbulence size of 162 µm. when the micro turbulence size was equal to the particle size, the maximum flo...

A pump is a machine or device that raises liquid from low surface to higher moves low-pressure high-pressure area. centrifugal equipment used provide energy fluid (liquid) based on the force generated by rotating impeller. So can be moved one place another. As it receives through impeller, velocity will increase. This kinetic then converted into compressive housing (casing) in form of spiral (v...

The technology for producing artificial rutile by the reduction-rusting method has advantages of high product quality and less slag. A computational fluid dynamics (CFD) is used to simulate solid-liquid suspension gas-liquid dispersion characteristics in stirred corrosion reactor. results show that maximum volume fraction difference solid phase reactor with an upward-lifting impeller 0.02, down...

The analysis sensitivity of strength, rigid and dynamic characteristics the console rotor to variation design parameters in paper describes speed rotation shaft, material impeller vary. dependences radial axial displacements on angular velocities modulus elasticity are established. For objects type rotary systems with a cantilever arrangement impeller, not one, but set criteria has been introdu...

The article presents the interim results of ongoing study (http://journals.ru.lv/index.php/SIE/article/view/6884/5683). At this stage, measurements are made with a model in which we combined mechanical part electromechanical part. presentation demonstrating principle operation scheme patented device has already been constructed as an object research. A rotating magnet was connected to impeller ...

The internal flow is very complex in the multiphase pump, especially static impeller, where more disorganized than that impeller wheel, and it will cause greater hydraulic losses. In order to investigate deeply rules within all kinds of losses are analyzed quantificationally pump. Based on standard SST k-ω turbulence model, selected helical axial pump as research object, used three-dimensional ...

It is well known that flow instabilities called rotating stall and surge may occur in non-cavitating turbomachines at flow rates smaller than design. Rotating stall is a local instability at the turbomachinery which is basically not dependent on the hydraulic system in which the turbomachine is installed. The stalled region rotates faster than impeller. Surge is a system instability in a hydrau...