Research on Influence Factors of New High-magnification Air Amplifier
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.
air amplifierspaced jet slitentrainment ratiostructure
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