• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>AIAA/ASME/SAE/ASEE joint propulsion conference exhibit >Deflagration Phenomena in a Constant Volume Vessel under Elevated Gravity
【24h】

Deflagration Phenomena in a Constant Volume Vessel under Elevated Gravity

机译：重力作用下恒容容器的爆燃现象

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In order to clarify the effects of gravity on deflagration phenomena, we conducted flammable gas explosion experiments using a constant volume combustion vessel under several gravity level from earth gravity (1 G) to elevated gravity up to 50 G. The elevated gravity field was formed by a centrifuge. We observed the expanding flames in hydrogen-air, methane-air, and propane-air mixtures by a high-speed camera and measured explosion pressures in the vessel. Lean and rich flammablility limits were determined by the records of the explosion pressures, and it was confirmed that the flammable range were approximately same regardless of the gravity level. In the methane-air and propane-air conditions, the shapes of the propagating flames changed dramatically with increase of gravity due to strong buoyancy effect, especially in lean and rich flame conditions with slow burning velocity. Also, with increase of gravity, maximum overpressure and maximum rate of pressuer rise decreased except the case of hydrogen-air flame with higher burning velocity.
机译：为了阐明重力对爆燃现象的影响，我们使用恒定体积的燃烧容器，在从地球重力（1 G）到最高重力到50 G的几个重力水平下，进行了可燃气体爆炸实验。离心机。我们通过高速摄像头观察到氢气，甲烷空气和丙烷空气混合物中不断膨胀的火焰，并测量了容器中的爆炸压力。通过爆炸压力的记录来确定稀薄和丰富的易燃性极限，并且证实了可燃范围与重力水平无关。在甲烷-空气和丙烷-空气条件下，由于强烈的浮力作用，尤其是在燃烧速度较慢的稀薄和浓火焰条件下，传播火焰的形状随重力的增加而急剧变化。而且，随着重力的增加，最大的超压和最大的增压器上升速率降低，除了氢空气火焰具有较高的燃烧速度的情况。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号