Numerical Simulation And Experimental Analysis Of Air - Flow Injection Air Injector

The fuze airflow induced vibration piezoelectric generator is a type of power generator which can use the ballistic trajectory wind as the excitation source.This kind of generator has long operating life and can be manufactured miniaturization. Meanwhile the activation time is short,according to its volume, it can generator more power. The fuze airflow induced vibration piezoelectric generator was took as research object in dissertation, focus on the numerical simulation analysis of the piezoelectric power generation forced vibration and the exciting principle of airflow forced vibration.Based on the conclusion "The transition point close to the inlet flow", the transition of the air inlet airflow was ignored, the turbulence model was directly used in this case. On the foundation of this theory, circular tube airflow transient Navier Stokes equation and RNGk-ε　turbulence model was made.Geometrical shape of the air inletseverelyinfluence piezoelectric power structure vibration performance, thus airflow induced excitation piezoelectric generator was designed. At the same time, flow field numerical simulation under the different shapes of right angle, angle, arc was made. Velocity flow field analysis and the the pressure flow field was taken into consideration. This became the theory basis of air compressor airflow simulation experiment and the choice of air inlet structure.Via the experiment of air compressor experiment, the test of resonator bottom pressure and piezoelectric energy converter was made. The experiment of different inner hole of the nozzle witheric hinske curve、cone and arc-shaped influence on the vibration source performance was taken into consideration.This dissertation gives references of the fuze airflow induced vibration piezoelectric generator stimulate mechanism on both experimental and theoretical.