The Analyse And Research Of Geometrical Parameter In The Multiphase-pump Impeller

Multiphase transportation developed recently is one of the most effective and economical technique in the exploitation of oil field, and multiphase flow pump a synthesis combining regular liquid pump with gas compressor is its core equipment. With the increase of multiphase-pump study between internal and external, how to optimize multiphase pump impeller parameter is gradually regarded by people, and becomes a hotspot of multiphase transportation study currently.Impeller as one of the most important parts in multiphase pump is composed of whirly impeller and stator impeller. The whirly impeller transfers energy to the medium to improve its energy, and the stator impeller translates kinetic energy into pressure energy. Multiphase pump's efficiency and stability rely on impeller its basic unit. To scheme out highly efficient and stabile multiphase pump with excellent capability, the key is the design of impeller. High efficiency impeller can be designed by studying the interior flow field of impeller and finding out the law in it, according to which impeller being optimized.This thesis starts with the impeller of YQH-100 oil-gas multiphase pump, applying the method of air compressor and pump to design new impeller through changing it. According to change wrap, numbers of the lamina and the aerofoil, the function that impeller parameter acts in multiphase pump can be compared through new experiment. Last, YQH-100 impeller is final optimized in both air compressor and pump two sides according to above experimental results, and better design is worked out than before.This design uses Pro/E to build three-dimensional model and GAMBIT to plot mesh, and the model is simulated, analyzed and drawn impeller capability picture by FLUENT to confirm its total capability. By analyzing the distributing of velocity of flow, pressure and total pressure in the flow field, the interior flow field in impeller is known and repaired according to its shortage. It is proven by experiments that there are improvement of multiphase pump in both efficiency and the rate of gas contained, and there is prominent effect through design, which offers useful data to further work.