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| 变转速模型旋翼挥舞摆振低阶载荷试验研究 | |
| 引用本文： | 黄东盛,吴世杰,韩东. 变转速模型旋翼挥舞摆振低阶载荷试验研究[J]. 航空学报, 2016, 37(3): 873-882. DOI: 10.7527/S1000-6893.2015.0189 |
| 作者姓名： | 黄东盛 吴世杰 韩东 |
| 作者单位： | 南京航空航天大学 直升机旋翼动力学国家级重点实验室, 南京 210016 |
| 基金项目： | National Natural Science Foundation of China(11472129)，Aeronautical Science Foundation of China(2013ZA52014)，Fundamental Research Funds for the Central Universities(NS2014007)，A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions 国家自然科学基金(11472129)，航空科学基金(2013ZA52014)，中央高校基本科研业务费专项资金(NS2014007)，江苏高校优势学科建设工程资助项目 |
| 摘 要： | 为研究变转速旋翼挥舞和摆振方向低阶载荷,以无铰式复合材料模型旋翼为研究对象,通过试验研究,探讨了旋翼桨叶根部挥舞和摆振零阶及前3阶载荷随旋翼转速、前飞速度和旋翼拉力的变化关系。试验结果表明,在相同的配平条件(前飞速度、旋翼拉力、俯仰力矩及滚转力矩)下,降低旋翼转速有利于减小模型旋翼摆振零阶载荷,明显降低旋翼需用功率,进而提升直升机性能。当旋翼转速较低时,随着旋翼转速的降低,挥舞前3阶载荷幅值均较大。旋翼转速较低时,摆振弯矩前3阶也较大。当旋翼工作于摆振1阶共振转速附近时,旋翼挥舞前2阶和摆振前2阶载荷突增较为明显,挥舞3阶和摆振3阶变化相对较小,其中以摆振1阶载荷变化最为明显,需特别注意旋翼工作于共振转速附近时的载荷问题。 |
| 关 键 词： | 旋翼 变转速 载荷 挥舞 摆振 风洞试验 |
| 收稿时间： | 2015-03-30 |
| 修稿时间： | 2015-06-28 |
Experimental investigation of flapwise and lagwise lower harmonic loads of a variable speed model rotor |
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| HUANG Dongsheng,WU Shijie,HAN Dong. Experimental investigation of flapwise and lagwise lower harmonic loads of a variable speed model rotor[J]. Acta Aeronautica et Astronautica Sinica, 2016, 37(3): 873-882. DOI: 10.7527/S1000-6893.2015.0189 | |
| Authors: | HUANG Dongsheng WU Shijie HAN Dong |
| Affiliation: | National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
| Abstract: | To investigate the characteristics of the flapwise and lagwise lower harmonic loads of variable speed rotors, a composite hingeless model rotor is tested in a wind tunnel. The zero and first three harmonic flapwise and lagwise root bending moments with the rotor speed, forward speed and rotor thrust are investigated. The test results indicate that reducing the speed of the model rotor can decrease the zero harmonic lagwise root bending moment, which means the reduction of the rotor power and the performance improvement of the rotor. At lower rotor speed, the first three flapwise harmonic loads increase with decreasing rotor speed. At lower rotor speeds, the first three lagwise loads are substantially large. When the rotor speed working near the first lagwise resonance rotor speed, the first two flapwise and lagwise loads are substantially large, and the variation of the third flapwise and lagwise loads are substantially small. Attention should be paid to the distinctly large first harmonic lagwise load, which can cause severe dynamic loads problems. |
| Keywords: | rotor variable speed loads flapwise lagwise wind tunnel test |
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