• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Springer Open Choice >A Computational Fluid Dynamic Investigation of Inhomogeneous Hydrogen Flame Acceleration and Transition to Detonation
【2h】

A Computational Fluid Dynamic Investigation of Inhomogeneous Hydrogen Flame Acceleration and Transition to Detonation

机译：非均质氢火焰加速和爆轰过渡的计算流体动力学研究

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Gas explosions in homogeneous reactive mixtures have been widely studied both experimentally and numerically. However, in practice and industrial applications, combustible mixtures are usually inhomogeneous and subject to vertical concentration gradients. Limited studies have been conducted in such context which resulted in limited understanding of the explosion characteristics in such situations. The present numerical investigation aims to study the dynamics of Deflagration to Detonation Transition (DDT) in inhomogeneous hydrogen/air mixtures and examine the effects of obstacle blockage ratio in DDT. VCEFoam, a reactive density-based solver recently assembled by the authors within the frame of OpenFOAM CFD toolbox has been used. VCEFoam uses the Harten–Lax–van Leer–Contact (HLLC) scheme fr the convective fluxes contribution and shock capturing. The solver has been verified by comparing its predictions with the analytical solutions of two classical test cases. For validation, the experimental data of Boeck et al. () is used. The experiments were conducted in a rectangular channel the three different blockage ratios and hydrogen concentrations. Comparison is presented between the predicted and measured flame tip velocities. The shaded contours of the predicted temperature and numerical Schlieren (magnitude of density gradient) will be analysed to examine the effects of the blockage ratio on flame acceleration and DDT.
机译：均相反应混合物中的瓦斯爆炸已经在实验和数值上得到了广泛的研究。然而，在实践和工业应用中，可燃混合物通常是不均匀的，并且受到垂直浓度梯度的影响。在这种情况下进行了有限的研究，导致在这种情况下对爆炸特性的了解有限。目前的数值研究旨在研究不均匀氢/空气混合物中的爆燃到爆轰过渡（DDT）的动力学，并研究DDT中障碍物堵塞率的影响。 VCEFoam是一种由作者最近在OpenFOAM CFD工具箱框架内组装的基于反应性密度的求解器。 VCEFoam使用对流通量贡献和震动捕捉的Harten-Lax-van Leer-Contact（HLLC）方案。通过将求解器的预测与两个经典测试用例的解析解进行比较，已验证了该求解器。为了验证，Boeck等人的实验数据。 （） 用来。在矩形通道中进行了三种不同的堵塞率和氢浓度的实验。比较了预测和测得的火焰尖端速度。将分析预测温度和数值Schlieren（密度梯度的大小）的阴影轮廓，以检查堵塞率对火焰加速度和DDT的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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