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首页> 外文期刊>Nuclear Engineering and Design >Experimental study of laminar and turbulent flame speed of a spherical flame in a fan-stirred closed vessel for hydrogen safety application
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Experimental study of laminar and turbulent flame speed of a spherical flame in a fan-stirred closed vessel for hydrogen safety application

机译：扇形密闭容器中球形火焰的层流和湍流火焰速度的氢气安全性实验研究

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摘要

The aim of this paper is to report new experimental results on the effect of turbulence on the propagation speed of hydrogen/air flames. To do so, a new experimental setup, called the spherical bomb, has been designed and built at CNRS-ICARE laboratory. With this new setup, the effect of a given and well-characterized turbulence intensity on the increase of hydrogen/air flame speed can be investigated. This new facility consists of a spherical vessel equipped (563 mm internal diameter) equipped with 8 motors which are linked to fans inside the bomb. Fan actuation induces the generation of a turbulent flow inside the vessel prior to any ignition. The spherical bomb is equipped with 4 quartz windows (200 mm optical diameter) that allow the use of a Particle Image Velocimetry diagnostic in order to characterize the turbulence level inside the bomb. The flame propagation was recorded using a high speed camera at 19,002 frames per second. These experiments were performed for lean to stoichiometric hydrogen/air mixtures (16-20% of H-2 in air), initially at ambient temperature and pressure, and for a rotation speed from 1000 to 5000 rpm. The PIV measurements showed that a homogeneous and isotropic turbulence is created with a fluctuation speed that can reach 4 m/s at 5000 rpm. (C) 2016 Elsevier B.V. All rights reserved.
机译：本文的目的是报告关于湍流对氢/空气火焰传播速度影响的新实验结果。为此，CNRS-ICARE实验室设计并建造了一种新的实验装置，称为球形炸弹。通过这种新设置，可以研究给定且特征明确的湍流强度对氢气/空气火焰速度增加的影响。这个新设施包括一个球形容器（内径563毫米），该容器装有8个电动机，这些电动机与炸弹内的风扇相连。风扇致动会在任何点火之前在容器内部产生湍流。球形炸弹配有4个石英窗口（光学直径200毫米），允许使用粒子图像测速诊断技术来表征炸弹内部的湍流度。使用高速相机以每秒19,002帧的速度记录火焰的传播。这些实验是针对稀薄至化学计量的氢气/空气混合物（空气中16-2％的H-2）进行的，最初是在环境温度和压力下进行的，转速为1000至5000 rpm。 PIV测量表明，产生了均匀且各向同性的湍流，其波动速度在5000 rpm时可达到4 m / s。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Nuclear Engineering and Design》 |2017年第2期|214-227|共14页
  • 作者

    Goulier J.; Chaumeix N.; Halter F.; Meynet N.; Bentaib A.;

  • 作者单位

    CNRS, ICARE, 1C,Ave Rech Sci, F-45071 Orleans 2, France|IRSN, Fontenay Aux Roses, France;

    CNRS, ICARE, 1C,Ave Rech Sci, F-45071 Orleans 2, France;

    CNRS, ICARE, 1C,Ave Rech Sci, F-45071 Orleans 2, France;

    IRSN, Fontenay Aux Roses, France;

    IRSN, Fontenay Aux Roses, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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