| Autor: |
CHEN Jianwei, ZHU Qinghua, WANG Kun, ZHU Zhenhua, SHEN Suiyuan |
| Jazyk: |
čínština |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Hangkong gongcheng jinzhan, Vol 11, Iss 2, Pp 167-175,198 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
1674-8190 |
| DOI: |
10.16615/j.cnki.1674-8190.2020.02.003 |
| Popis: |
There will be complex interference between the front and rear rotors of tandem helicopter. The flow field analysis is carried out for the aerodynamic interference between two rotors, the numerical analysis method based on momentum source model and N-S(Navier-Stokes) equation is established, the k-ω SST two equation turbulence model is selected, and the pressure implicit solver is used to verify the solution method; The interaction flow fields of the front and rear rotors of a tandem twin rotor helicopter in hover, forward flow and backward flow are simulated respectively. Combined with the calculation results and the flow field characteristics, the aerodynamic phenomena caused by the interference flow field are analyzed. The results show that in hover, the performance of the front rotor and the rear rotor decreases, and the performance of the front rotor is greatly influenced by the rear rotor; In the forward flow state, the lift loss of the rear rotor is greater than that in the hover state; In the backward flow state, the loss of lift of the front rotor is more obvious, and the loss of rotor efficiency at the lowest position is nearly half. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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