By means of setting inlet pre-rotator ,the inlet and exit flow field of the diagonal flow impeller with exit guide volute have been measured with 5 holes probe, in different flow conditions, and in the conditions of positive and negative pre-rotating. The expe1iment results are compared with that of without the pre-rotator.

Abstract The mechanical characteristics of the impeller are important indicators that determine working pump. pump is subjected to periodic hydraulic loads during process. This load will cause dynamic deformation and shaft, thereby further affecting distribution fluid. Liquid-solid coupling used. Method, rated operating point centrifugal analyzed, it proved stress shaft meets requirements, whic...

BACKGROUND Mass transfer plays an important role in determining the efficiency of the biofuel conversion. However, adverse effect of shear stress from traditional agitation inhibits the cell growth and production of biofuels. How to enhance the mass transfer with less adverse effect is considered as one of the important bioengineering issues. RESULTS In this study, a novel agitation type, nam...

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...