圆柱形容器内浴缸涡周围流动分布的研究

IF 0.6 4区 工程技术 Q4 Engineering
S. Sakai, H. Madarame, K. Okamoto
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引用次数: 0

摘要

对圆柱形容器中浴缸涡的流场进行了测量。浴缸漩涡的气体核心在容器中心静止形成。在顶部切向处和底部中心处分别设置入口明渠和出口管道。用油墨示踪剂或颗粒示踪剂对流场进行可视化,得到流速分布。除出口附近外,中心区域的向下速度与与不含气芯的原始表面的距离成正比。利用激光多普勒测速仪,测量了血管内向下流速的径向分布。发现中部地区的速度分布非常复杂。在低流量条件下,速度最高的位置是中心。然而,随着流量的增加,最高位置向外移动。中部地区的内部几乎停滞不前。通过中心区域的流量为总流量的10 ~ 50%。停滞区的形成与向下速度梯度的确定有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on the Flow Distribution Around a Bathtub Vortex in a Cylindrical Vessel
Flow field around a bathtub vortex in a cylindrical vessel was measured. A gas core of the bathtub vortex was stationarily formed at the center of the vessel. An inlet open channel and an outlet pipe were equipped at the top tangentially and at the bottom center, respectively. Flow field was visualized using ink tracer or particle tracers, resulting in the velocity distribution measured. The downward velocity in the central region was found to be proportional to the distance from the original surface without the gas core except in the neighborhood of the outlet. Using the Laser Doppler Velocimeter, radial distribution of the downward velocity in the vessel was measured. The velocity distribution in the central region was found to be very complex. In the lower flow rate condition, the highest velocity position was the center. However, with increasing the flow rate, the highest position moved to outside. The inside of the central region was almost stagnant. The flow rate through the central region was 10 ∼ 50 % of the total flow rate. Formation of the stagnant region was related to the determination of the downward velocity gradient.
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来源期刊
Nuclear Engineering International
Nuclear Engineering International 工程技术-核科学技术
自引率
0.00%
发文量
0
审稿时长
6-12 weeks
期刊介绍: Information not localized
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