Mogi Toshio, Horiguchi Sadashige
National Institute of Advanced Industrial Science and Technology, Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
J Hazard Mater. 2009 May 15;164(1):114-9. doi: 10.1016/j.jhazmat.2008.07.133. Epub 2008 Aug 6.
In this study, the explosion and detonation characteristics of dimethyl ether (DME) were experimentally investigated. A spherical pressure vessel with an internal volume of 180L was used as the explosion vessel. Therefore, tubes 10m in length with internal diameters of 25mm and 50mm were used as detonation tubes. In addition, we compared the characteristics of DME with those of propane since DME is considered as a substitute fuel for liquid petroleum gas (LPG). At room temperature and atmospheric pressure, the maximum explosive pressure increased tenfold. The explosion index (K(G) values), an indicator of the intensity of an explosion, was larger than that of propane, indicating that the explosion was intense. No experimental study has been conducted on the detonation behavior of DME so far, but this research confirmed a transition to detonation. The detonation characteristics were similar to the characteristics of the Chapman-Jouguet detonation, and the concentration range for detonation was from 5.5% to 9.0%.
在本研究中，对二甲醚（DME）的爆炸和爆轰特性进行了实验研究。使用一个内部容积为180L的球形压力容器作为爆炸容器。因此，将长度为10m、内径分别为25mm和50mm的管道用作爆轰管。此外，由于DME被视为液化石油气（LPG）的替代燃料，我们将DME的特性与丙烷的特性进行了比较。在室温和大气压下，最大爆炸压力增加了十倍。爆炸指数（K(G)值）是爆炸强度的一个指标，其值大于丙烷的爆炸指数，表明爆炸剧烈。到目前为止，尚未对DME的爆轰行为进行实验研究，但本研究证实了向爆轰的转变。爆轰特性与查普曼-朱盖特爆轰的特性相似，爆轰的浓度范围为5.5%至9.0%。
