基于受激发光实验的生物光尾流特性
Characteristics of bioluminescent wake based on stimulated luminescence laboratory experiments
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摘要: 基于生物受激发光与流场机械刺激间的相关性，构建了库埃特流场刺激下的生物受激发光实验平台，分析了影响生物发光的水动力因素剪应力。实验结果显示：引起多边膝沟藻受激发光的剪应力阈值为0.1 N/m2；当流场中的剪应力大于发光阈值后，生物发光强度随着剪应力的增大而增强。采用FLUENT软件模拟计算了不同航速下某潜艇尾流场中的剪应力，计算结果表明：剪应力随着尾流长度的增加而减小，在近场区域剪应力出现了类似正弦波振荡的减小，且航速越大减幅越大，减速越快；当潜艇航速大于4.1 m/s航行时， 2 000 m处尾流的剪应力仍然大于引起生物发光的剪应力阈值。Abstract: Based on the relative characteristics of stimulated bioluminescence and hydrodynamic flow, the experimental platform of stimulated bioluminescence in Couette flow was built. The hydrodynamic elements stimulated bioluminescence were analysised. The threshold of shear stress for stimulated bioluminescence of Lingulodinium polyedrum is 0.1 N/m2. And bioluminescence emission is the function of shear stress and increases with it when the shear stress exceeds the threshold. The shear stress distributions of submarine were simulated by FLUENT software. The results of calculation illustrate that the shear stress decreases with the increased length of wake of submarine and it can be decreased as the oscillation of sine wave in the near area. The shear stress of wake decreases rapidly and widely wit
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Key words:
- bioluminescent wake /
- shear stress /
- bioluminescence /
- couette flow /
- lingulodinium polyedrum /
- threshold
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