| As intricate failure mechanism, the inner flow of Pelton turbine, 3-D unsteady turbulence, characterized free stream surface influenced by rotary force, is also considerably complex. With a great deal of unknown details, in the case of multi-jet turbine, the flow motion of runner and housing case will be more perplexed. In this article, with multi-turbine model is established, by make use of CFD technology, the inner flow of scoop, steady and free surface flow, carried out numerical simulation and gained content result.On the basis of the flow theory analysis of multi-jet turbine, by make use of FLUENT software, gained the fluid particle movement trace of single scoop working face, this outcome will provide scientific evidence for the optimum design of runner profile. At the same time, at home, at first time, according to whether scoop notch discharge or not, the optimum scoop number of multi-jet turbine will be decided. This thought and method is a significant contribution for decision of scoop number of multi-jet turbine.In this article, gained the inner pressure distribution principle of housing case, this outcome will provide scientific evidence for air inflating and tailwater elevation. gained the fluid particle movement trace of multi-jet turbine runner , gained the conclusion there are not flow interference between adjacent jet stream. Therefore, it is unnecessary that the flow partition is fixed between adjacent jet stream. On the basis of three dimension modeling of nozzle and runner, by make use of ANSYS software, gained stress distribution of scoop , max stress value point, natural frequency and mode atlas of nozzle and runner, these will serve with intensity design of multi-jet turbine runner scoop. besides, there are a significant meaning for vibration research of nozzle and runner. |
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