Study on the Bunching Characteristics of Underwater Plasma Sound Source
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摘要: 分析水下等离子体声源的反射聚束特性，对研究和应用水下定向辐射技术具有重要的指导意义。对不同曲面障板的反射规律做了分析，利用Euler方程建立了水下等离子体声源的聚束声场分布模型，利用迎风型WENO格式对方程进行求解，仿真计算了两种曲面障板的聚束过程和声场分布特性，并设计相关实验对仿真结果进行了验证。研究结果表明，仿真结果与实验测量结果基本吻合，得到的声场云图较为直观地反映了声源的反射聚束特性，证明了仿真模型的有效性，为进一步研究水下定向辐射技术、提高声源级奠定了基础。Abstract: The reflection bunching characteristics analysis of underwater plasma sound source has an important guiding significance on the research and application of underwater directional radiation technology.The reflection rules of different surfaces were analyzed, and the bunching sound field distribution model of underwater plasma sound source based on the Euler equation was established, which was solved by unwind WENO pattern.The intense pulsed acoustic wave bunching and the sound field distribution were analyzed by simulation, and the sound field charts illustrated the reflection bunching characteristics of the sound source.Some related experiments to verify the simulation results were designed.The simulation results are basically identical to the experimental results.It shows that the simulation model is reliable; this information is critical and lays the foundation for the further research on underwater directional radiation technology and the improvement of the source level.
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图 3 椭球面反射罩的聚束反射声场分布云图
Figure 3. Bunching sound field distribution nephogram of the ellipsoidal reflector
图 4 抛物面反射罩的聚束反射声场分布云图
Figure 4. Bunching sound field distribution nephogram of the parabolic reflector
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