CAJ | 학술논문

采用非定常k-ω湍流模型和滑移网格技术，从安装角β=0°、β<0°和β>0°三个方面分析了安装角对直叶片升力型风轮气动特性的影响规律。研究得出，负安装角增大，有效提高了上盘面力矩，局部范围内减小了下盘面力矩。正安装角的增大，大幅度大范围降低了上盘面力矩，局部范围内大幅度提高了下盘面力矩。两者比较得出，负安装角可改善风轮的气动流场，增加风轮的风能利用系数。部分计算结果得到了试验结果验证，证明可以反映流场的真实信息。
채용비정상k-ω단류모형화활이망격기술，종안장각β=0°、β<0°화β>0°삼개방면분석료안장각대직협편승력형풍륜기동특성적영향규률。연구득출，부안장각증대，유효제고료상반면력구，국부범위내감소료하반면력구。정안장각적증대，대폭도대범위강저료상반면력구，국부범위내대폭도제고료하반면력구。량자비교득출，부안장각가개선풍륜적기동류장，증가풍륜적풍능이용계수。부분계산결과득도료시험결과험증，증명가이반영류장적진실신식。
In order to know about the influences of the blade installation angle β on the performances of straight-bladed vertical axis wind rotors, an unsteady k-ωturbulence model with sliding grid technology was used to model aerodynamic performance in two-dimensional numerical study, from three aspects of β=0°, β<0° and β>0°. The results show that: if the absolute value of the negative installation angle is increased, the torque output of blades running in the upstream circle is promoted effectively, while the torque of blades in the downstream circle decreases slightly. If the positive installation angle increases, the torque output of blades running in the upstream circle decreases dramatically in a wide zone, while a great promotion of torque is only took place in a narrow zone. Compared two results, it is concluded that a negative angle install approach can improve the flow field of the wind rotor and increase the power coefficient of the wind rotor. The comparison between the test results and simulation results proves that the change rules are the same, the error is within the allowable range, the simulation results reflect real information of the wind rotor.