Effects of the Second-Stage of Rotor with Single Abnormal Blade Angle on Rotating Stall of a Two-Stage Variable Pitch Axial Fan
| Autor: | Qian Zhang, Songling Wang, Liang Zhang, Lei Zhang, Yuan Tie, Kuan Jiang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Control and Optimization Computer simulation Renewable Energy Sustainability and the Environment Turbulence lcsh:T 020209 energy Energy Engineering and Power Technology Cell formation Stall (fluid mechanics) 02 engineering and technology Mechanics Throttle lcsh:Technology rotating stall Unsteady flow Axial compressor Mechanical fan numerical simulation 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering abnormal blade installation angle two-stage axial fan Engineering (miscellaneous) Energy (miscellaneous) |
| Zdroj: | Energies, Vol 11, Iss 12, p 3293 (2018) Energies Volume 11 Issue 12 |
| ISSN: | 1996-1073 |
| Popis: | It is of great value to study the impact of abnormal blade installation angle on the inducement mechanism of rotating stall to achieve the active control of rotating stall in an axial fan. Based on throttle value function and SST k-&omega turbulence model, numerical simulations of the unsteady flow process in stall condition of an axial flow fan with adjustable vanes were carried out, and the influence mechanism of abnormal stagger angle of a single blade in the second stage rotor on induced position and type of stall inception and evolution process of rotating stall were analyzed. The results show that compared with synchronous adjustment of blade angle, the blade with abnormal stagger angle will cause the increase of flow rate at the beginning of stall and make the fan fall into an unstable condition in advance. The existence of blade with abnormal angle does not cause the change of the induced position and type of stall inception and the inducement mechanism of rotating stall, which are the same as the axial fan with normal blade angle. Moreover, the single blade with abnormal deviation angle has important impacts on the 3D unsteady evolution process from stall inception to stall cell formation in two rotors. |
| Databáze: | OpenAIRE |
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