| This article has been：Browse 1504Times Download 2979Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.2019192 |
|
| Optimizing Twin-spin Turbine Blades Using Fluid Flow Simulations |
|
LIU Zhaoliang1, WANG Jinlong2, YUAN Chengdong3, ZHANG Xiaqi3, WANG Hui3
|
|
1.Shandong University of Science and Technology, Qingdao 266590, China; 2.Weifang University, Weifang 261061, China
|
| Abstract: |
| 【Objective】The primary objective of this paper is to study the relationship between characteristics of external flow field in the twin-rotating turbine to find the optimal blades in the turbine.【Method】We simulated the external fluid flow numerically in the turbine under different combinations of three factors: the number of twin-rotor blades (N=3, 5 and 6), blade opening and central shaft opening in the external flow field. We then analyzed and optimized the model, and compared it with the traditional oblique blade turbine blades.【Result】When the number of blades was 6, the circulation of the external flow field was manifested. As such, the circulation intensity was relatively large and mixing efficiency was the highest. The perforation of the blade and the central axis destroyed the circulation to certain extent and reduced stirring efficiency as a result. The number of blades was the factor that impacted the flow field most.【Conclusion】Among the three factors we investigated, the number of blades was most important in impacting the outflow field. Compared with non-perforated blades, perforating the blades and the central shaft hole reduced the mixing efficiency to certain extent. The optimal result was 6 non-perforated turbine blades. The simulation results have important implication for analyzing turbine blades, offering theoretical help for design of impeller of agitator. |
| Key words: twin twist blade; flow field; opening; circulation |
|
|
