基于正交试验的双内齿迷宫灌水器数值模拟.

Comparing to ordinary rectangular labyrinth, the vertical channel was added two internal tooth and transverse channel was added one internal tooth respectively for forming four double inner teeth rectangular labyrinth channels with different position of inner tooth. The ordinary rectangular labyrinth channels and teeth double inner teeth rectangular labyrinth channels had the same minimum flow cross section, in order to study the hydraulic performance all of them. And the method of numerical simulation and orthogonal test were used to select the primary factors of inner tooth spacing, relative position and tooth height. Through variance analysis and range analysis, the main factors and secondary factors affecting the hydraulic performance were found. Finally the optimal scheme was got. The results show that in the ordinary rectangular labyrinth with internal tooth, the effect of energy dissipation will be better and the flow index generally decreases from 11.18% to 18.01%; three factors’ influencing order of double inner tooth rectangle labyrinth channel is that the relative position of inner tooth > inner tooth height > the inner tooth spacing; the structure of double inner tooth rectangular labyrinth channel with the minimum flow index is that the left upper side and right lower side in vertical flow and the side without vortex in transverse vortex adds inner tooth. The tooth spacing is 0.5 mm, tooth height is 0.9 mm and the flow index is 0.500 6. [ABSTRACT FROM AUTHOR]