摘要
针对轴流风机出口流量过小,风机效率过低问题,基于计算流体力学理论和Fluent软件,建立轴流风机内部流场数值仿真模型,实验测试与仿真计算值误差为4.3%,验证了数值模型的正确性,为后续优化设计提供了依据.数值仿真结果表明:原风机结构的轴流风扇及导叶设计不合理,气流迹线杂乱,沿程损失大,影响了风机性能.通过优化轴流风扇结构参数,将直导叶变为弯曲导叶,并采用正交试验设计方法对导叶进行了匹配优化设计,优化后的风机气流迹线平稳,出口流量由0.167 7 kg/s增加至0.192 8 kg/s,效率由33.2%提高至51.7%.最后基于流固耦合理论计算了轴流风扇在旋转工作时的应力及位移值,结果表明,风扇强度满足要求.
In order to solve the problem of the small outlet flow rate and the low efficiency of an axial-flow fan,a numerical simulation model to compute airflow field is set up according to the theory of computational fluid dynamics and software Fluent; the error of numerical simulation and experimental results is 4. 3%,and the reliability of the model is validated,which provides a basis for optimizing. The numerical simulation results show that the structure of the axial fan and guide vane are unreasonable,the airflow trajectory is in disorder and the route loss is great,which affects the performance of the axial-flow fan. By optimizing the parameters of the fan and redesigning the upright guide vanes twisted spatial type,and match up the axial-fan with orthogonal test analysis,the airflow trajectory is ordered,the outlet flow rate is increased from 0. 167 7 kg/s to 0. 192 8 kg/s,the efficiency is increased from 33. 2% to 51. 7%. At last,the stress and displacement is carried out for the axial fan in rotating work based on fluid-structure interaction,the result shows that the strength of the axial fan meets the requirements.
出处
《江苏科技大学学报（自然科学版）》
CAS
北大核心
2017年第1期61-65,94,共6页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
关键词
轴流风机
流固耦合仿真
翼型风扇
导叶
axial-flow fan
fluid-structure interaction simulation
airfoil fan
guide vane
