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圆湍射流中的拟序结构和颗粒弥散
  • 期刊名称：化工学报.(6): 1329-1333,2006 (EI)
  • 时间：0
  • 分类：TK222[动力工程及工程热物理—动力机械及工程]
  • 作者机构：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027
  • 相关基金：国家自然科学基金项目（50236030,50506027）.
  • 相关项目：气固两相流动中多尺度、多向耦合作用的直接模拟
关键词： 两相圆射流, 拟序结构, 颗粒弥散, 粒子图像测速技术, two-phase round jet, coherent structures, particle dispersion, PIV
中文摘要：

气固两相圆射流广泛存在于各种工程应用当中.仅以能源工程领域来说,煤粉的输送、分离、燃烧效率及污染物的生成控制等过程都跟煤粉颗粒在湍流气流中的弥散方式有关.预测并控制颗粒在气流中的弥散对于实现稳定燃烧、强化传热、降低噪声等有十分重要的意义.为此,需要深入理解气固两相射流中拟序结构的演化特性和不同颗粒的弥散规律.

英文摘要：

To provide reference for engineering application and validation of numerical simulations PIV experimental technology was used to visualize a gas-solid two-phase turbulent round jet. The Reynolds number of the flow Re： 6200 and the Stokes numbers of particles were 1.2, 9.2 and 25.7, respectively. It was shown that the coherent structures was transformed from large-scale to small-scale and from twodimensional to three-dimensional. The preferential concentration effect was observed for particles at the Stokes number of 1.2. With the increase of the Stokes number or the mass loading, the particles were less influenced by coherent structure.

同期刊论文项目
气固两相湍流拟序结构的直接数值模拟和实验研究
期刊论文 27 会议论文 1 获奖 2
气固两相流动中多尺度、多向耦合作用的直接模拟
期刊论文 18 会议论文 4
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