A New Method for Adjusting Setting Angle of Rotor Blade for Axial Fan in Wind Tunnel
| Autor: | Chenghua Cong, Zebin Ren, Wenguo Yang, Yuanqiang Luo, Xiaoli Qu |
|---|---|
| Jazyk: | čínština |
| Rok vydání: | 2019 |
| Předmět: |
off-design point
commissioning test Flow (psychology) 02 engineering and technology 01 natural sciences 010305 fluids & plasmas law.invention Physics::Fluid Dynamics 0203 mechanical engineering Mechanical fan law 0103 physical sciences flow theory of blade Total pressure Wind tunnel Motor vehicles. Aeronautics. Astronautics Pressure drop 020301 aerospace & aeronautics axial fan Rotor (electric) General Engineering setting angle TL1-4050 Aerodynamics Mechanics Flow velocity low speed wind tunnel Geology |
| Zdroj: | Xibei Gongye Daxue Xuebao, Vol 37, Iss 3, Pp 580-586 (2019) |
| ISSN: | 2609-7125 1000-2758 |
| Popis: | Combining the fan aerodynamic efficiency with the wind tunnel pressure loss coefficient, a new equation which points out the inherent relationship of the fan blade setting angle, fan rotating speed and gas flow rate in wind tunnel circuit is derived according to the two-dimensional flow theory of the axial fan rotor blades and the aerodynamic characteristics of the low speed wind tunnel. So a new method for setting angle adjustment of fan rotor blade to satisfy the fan performance at off-design point by getting the test results of fan operation parameters but without the fan total pressure rise in the low speed wind tunnel is developed. Flowing the new method, the setting angle adjusting value of fan rotor blade was provided only with the fan rotating speed and flow velocity in the test section of a low speed wind tunnel directly before the fan setting angle altered, the adjusting target was achieved by the new blade setting angle successfully and the time and cost of the wind tunnel commissioning test were saved. The test results show that, after increasing the fan rotor blade setting angle by 4.5 degrees, when the flow velocity in the wind tunnel test section reaches 60 m/s, the fan rotating speed is 570 r/min, the deviation from the predicted fan rotating speed value of 575 r/min is 0.9%. For the same test section flow velocity, the predicted value of the fan rotating speed is in a good agreement with the real value, it proves that this method is reliable and accurate in practical application. |
| Databáze: | OpenAIRE |
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