Educational demonstration of a spherically propagating acoustic shock.
Educational demonstration of a spherically propagating acoustic shock.
复制标题
球形传播声冲击的教育演示。
DOI：
--
复制
发表时间：
2012
影响因子：
2.4
通讯作者：
Jeffrey H. Macedone
中科院分区：
文献类型：
--
作者：
M. Muhlestein;K. Gee;Jeffrey H. Macedone
充气气球爆炸是常见的化学演示。他们还提供了一个娱乐和教育手段，以实验验证所描述的无损Burgers方程和弱冲击理论的恩肖解决方案的非线性声学理论。本文介绍了理论，示范，并进行了传播实验，以提供典型的结果的结果。数据分析表明，乙炔-氧气气球产生的声激波的演化符合弱激波理论。另一方面，由氢氧气球产生的压力波也非线性传播，但在传播距离上不接近N波状的弱激波形成。总的来说，实验表明，流行的化学反应演示可以从化学教室扩展到先进的物理声学学生的教学工具。
Exploding gas-filled balloons are common chemistry demonstrations. They also provide an entertaining and educational means to experimentally verify nonlinear acoustical theory as described by the Earnshaw solution to the lossless Burgers equation and weak-shock theory. This article describes the theory, the demonstration, and the results of a propagation experiment carried out to provide typical results. Data analysis shows that an acetylene-oxygen balloon produces an acoustic shock whose evolution agrees well with weak-shock theory. On the other hand, the pressure wave generated by a hydrogen-oxygen balloon also propagates nonlinearly, but does not approach N-wave-like, weak-shock formation over the propagation distance. Overall, the experiment shows that popular demonstrations of chemical reactions can be extended from chemistry classrooms to a pedagogical tool for the student of advanced physical acoustics.