摘要
利用数值模拟的方法,对宽弦空心风扇叶片在空气场作用下的瞬态响应进行了研究.采用流固耦合数值计算方法,得到了某宽弦空心风扇叶片在非定常边界条件下的变形响应.计算结果表明,叶片在空气场的作用下,最大位移发生在叶片前缘叶尖处,在沿叶展方向与叶片内部芯板结构沿叶展方向分布重合处产生应力集中,应力值由叶片表面向叶片内部逐渐减小,内部芯板虽然厚度较薄,但分布应力值均较小,且应力集中发生在叶片表面.气动力与叶片结构之间的耦合作用,使叶片结构模态振型沿周向不再均匀分布.叶片在气固耦合时的变形响应以绕旋转轴的弯曲振动为主,接近叶片的一阶模态变形.
By using the numerical simulation method, the transient response of a widechord hollow fan blade was investigated under the atmospheric flow field. The deformation response of the wide-chord hollow fan blade was obtained under unsteady boundary conditions with the fluid-structure interaction numerical simulation method. Computational results show that, under the action of the air flow field, the largest displacement occurs in the top of the front blade and the stress concentration is resulted from the superposition area along the spanwise direction including blade and core, with the stress decreased gradually from surface to inner of the blade. The stress concentration occurs in the blade surface while the distribution stress is relatively small and the core is relatively thin. The modal shape of the blade structure has not been well distributed along the circumferential direction due to the coupling effect between the aerodynamic force and the blade structure. When the fan blade is under fluid-solid coupling, the bending vibration is significant and close to the firstorder vibration mode.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2008年第12期2177-2183,共7页
Journal of Aerospace Power
基金
新世纪优秀人才支持计划(NCET-05-0189)
作者简介
王营（1973-），女，吉林长春人，博士生，工程热物理专业，主要从事流固耦合数值计算方面研究.
