Burning characteristics of premixed sprays and gas-liquid coburning mixtures
Burning characteristics of premixed sprays and gas-liquid coburning mixtures
复制标题
预混喷雾和气液共烧混合物的燃烧特性
DOI：
10.1016/0010-2180(88)90085-5
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发表时间：
1988
影响因子：
4.4
通讯作者：
Satoshi Tanimura
中科院分区：
文献类型：
--
作者：
K. Nakabe;Y. Mizutani;T. Hirao;Satoshi Tanimura
为了观察悬浮在气流中的液滴云中或气态燃料-空气混合物中稳定的湍流火焰的传播，精心设计了一种预混合喷雾燃烧器。为了确定与其燃烧速度相对应的喷雾火焰的最合适参考面，研究了各种方法。由于喷雾火焰通常很厚且不稳定，因此很难找到控制喷雾燃烧速度的参考火焰面。研究发现，与直接照相法和纹影照相法测定的火焰表面相比，OH自由基发射强度最大的表面更适合作为参考火焰表面。我们的煤油喷雾燃烧速度数据的定性特征与其他研究人员的一致；即，我们发现燃料与空气比呈线性关系，与索特平均直径成反比。对于混燃，存在一个最佳的煤油/丙烷质量流量比和一个使燃烧速度最大的最佳平均液滴直径。OH和C2自由基带上的瞬时火焰图像似乎表明，在喷雾火焰中发生了群燃烧。
A premixed spray burner was carefully designed for the observation of stable turbulent flames propagating in a droplet cloud suspended in a stream of air or for a gaseous fuel-air mixture. Various methods were examined to determine the most suitable reference surface of a spray flame, corresponding to its burning velocity. Difficulties arose in finding the reference flame surface, which governs the burning velocity of sprays, because the spray flames were usually thick and unsteady. It was found that the surface on which the OH radical emission had a peak intensity was more suitable as a reference flame surface than the surfaces determined by either direct or schlieren photography. The qualitative features of our burning velocity data for kerosene sprays agree with those of other investigators; that is, we found a linear dependence on the fuel-to-air ratio and an inverse proportionality to the Sauter mean diameter. Concerning coburning, there exists an optimum kerosene-to-propane mass flow ratio and an optimum mean droplet diameter that maximizes the burning velocity. Instantaneous flame images in OH and C2radical bands seem to suggest that group combustion occurs in a spray flame.
DOI：
10.1299/kikai1938.5.131
发表时间：
1939-02
期刊：
--
影响因子：
--
作者：
四郎 拔山;泰 棚澤
通讯作者：
四郎 拔山;泰 棚澤