Abstract
The hydrodynamic characteristics of pure conduit，tidal turbine，and conduit turbine was compared and analyzed through numerical simulation．The influence of gap ratio(3%~15%) on the energy conversion performance and flow field characteristics of heavy-duty and light duty conduit turbines was explored．The results showed that，without considering the tip clearance effect，the energy conversion efficiency of conduit on light load conduit turbines is significantly improved compared to bare turbines．Under the same operating conditions，the axial velocity of the light load guide tube turbine is higher than that of the heavy load guide tube turbine．Compared to light duty conduit turbines，the clearance ratio has a greater impact on the axial velocity of heavy duty conduit turbines，and the impact on energy conversion efficiency is also more significant．As the gap ratio increases，the mutual interference between the turbine tip vortex and the duct tail vortex gradually decreases.
| Translated title of the contribution | Analysis on influence of tip clearance on hydrodynamic characteristics of guide tube turbine |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 123-129 |
| Number of pages | 7 |
| Journal | Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) |
| Volume | 51 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 2023 |
| Externally published | Yes |
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