Numerical and visualization study on dynamic behavior of bubbles in anti-acceleration double tangent arc channel
The design of heat dissipation system of airborne electronic equipment is of great significance to the long-flight safe operation of aircraft.An acceleration-resistant double tangent arc flow channel was designed.Numerical analysis based on VOF multiphase flow model and visualization based on high-speed camera were carried out for the dynamic behavior of bubbles in the flow channel.The simulation analysis shows that,compared with the straight channel,the bubbles in the double tangent channel break into small bubbles and are thrown away from the heating surface due to the centrifugal force,which makes the vapor-liquid separation.The tangent arc channel with 30° has the weakest separation ability,but the bubbles remaining on the wall are the least.The separation ability of 60° tangent channel is the strongest,but the bubbles on the wall are not easy to flow.The visualization experiment of 45° tangent channel is carried out,and the visualization results are consistent with the simulation analysis.The simulation results show that when the velocity is 1 m/s,the 45°double tangent channel can effectively resist the acceleration of 5g.
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维普
