Theoretical Design,CFD Numerical Calculation And Experimental Study On Rectangle Labyrinth Screw Pump

Labyrinth screw pump, a new fluid mechanical production which with the striking characters of little float amount, high head and low ratio of transmission. , is developed from labyrinth sealing mechanics .So the normal pump products' performance grey area is filled up and the fluid mechanical applied range is widened.Nowadays, researches about such new labyrinth screw pump have just been done at the first step, rectangle labyrinth screw pump is belonged to such pump. All the researches are done upon the present immature theory system, which include as follows: (1) Theoretical design: In which the parameter selecting of the labyrinth spiral scroll is studied. According to related articles, the design method is determined, with which that hydraulic power design calculation is carried out, so that the pump structure mode is designed and the component treatment chart is draw. (2) CFD numerical calculation: The flow passage three-dimensional objects are modeled through PRO/E and the non-structural mesh was generated with the help of GAMBIT. FLUENT( a special flow field calculation software) is applied to simulate the 3D flow of clean water inside the pump. The Reynolds time-averaged N- S equation and Stand RNG k-εturbulent model, SIMPLEC algorithm based on non-structural mesh are adopted , on which the internal flow characteristics are gained. FLUENT is applied to predict the performance of the pump, and the outer characters can be gained. (3)Experimental study: Both the experimental programs are determined and setting drawing is worked out so that the service test experimental bench can be established. Variable speed service test are used to analyze the performance curve then the scaling law are certified.Through the experimental research the rationality of the design method of triangular labyrinth screw pump is checked. Meanwhile, the reliability of the selected model and the preciseness of the calculation method can be validated by comparing numerical calculation results. Due to the limited conditions, the researches are unperfected. However, reference value in the future development and design of the like products will be found in this research, because of its universal significance.