新型大倍率空气放大器性能影响因素的研究  

Research on Influence Factors of New High-magnification Air Amplifier

作　　者：董大腾 李小宁[1] 孙中圣[1] DONG Dateng;LI Xiaoning;SUN Zhongsheng(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《机械制造与自动化》2024年第4期71-75,共5页Machine Building & Automation

摘　　要：为了提高空气放大器的综合性能,设计一种环状多段射流缝隙的新型间隔射流式空气放大器。通过仿真与试验相结合的方法,研究单元数n与闭通比P对卷吸比、输出流量以及内部流动的影响规律。研究结果表明:随着P的增大,间隔射流式空气放大器的卷吸比增大,而输出流量逐渐减小;n对卷吸比与输出流量影响不大,但较小的n会在扩散混合区内引发边界层分离,影响流动的稳定性;当供气压力为0.5 MPa时,n=16、P=2的间隔射流式空气放大器卷吸比为2.55,与环射式空气放大器相比,其输出流量略高,卷吸比提升了5.8%。To improve the comprehensive performance of air amplifier,a novel spaced jet air amplifier with annular multi-segment jet gap is designed.The influence law of the closed-to-open ratio P and the number of cells n on the entrainment ratio,output flow and internal flow is studied by combination of simulation and experiment.The research results show that with the increase of the closed-to-open ratio P,the entrainment ratio of the air amplifier increases,while the output flow gradually decreases.The number of cells n has little effect on the entrainment ratio and output flow,but smaller cell numbers will cause boundary layer separation in the diffusion mixing zone,affecting the stability of the flow.When air supply pressure is 0.5 MPa,the entrainment ratio of the spaced jet air amplifier with n=16 and P=2 is 2.55,the output flow is slightly higher,and the entrainmfent ratio is increased by 5.8%compared with the annular jet air amplifier.

关 键 词：空气放大器 间隔射流 卷吸比 结构 

分 类 号：TH138[机械工程—机械制造及自动化]