Automatic Non-condensed Gas Purge System by Using Liquid Jet

使用液体喷射的自动非冷凝气体吹扫系统

• 批准号: 09555233
• 负责人: ESAKI Shuji
• 金额: $ 2.94万
• 依托单位: Kagoshima National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555233/
• 关键词: Nozzle; Multi-phase Flow; Bubble; Gas Entrainment; Jet

An experimental study was made to develop the automatic non-condensed gas purge system by using the multi-nozzle jets. Experiments were carried out in air-water system under condition of atmospheric pressure. Experimental parameters considered were the number of the nozzle, the pitch of the nozzle, the diameter of the nozzle, the velocity of the water jet, the height of the multi-nozzle from the liquid surface in a test pipe and the diameter of the test pipe. As the result, the jets injected from the multi-nozzle in the case of the nozzle pitch under 7mm join and become a large jet. Therefore, the gas entrainment for the multi-nozzle is almost the same that for the single large nozzle. On the other hand, jets from the multi-nozzle independently hit the water surface in the case of the nozzle pitch which is more than 10mm and the gas entrainment of the multi-nozzle is greater than that of the single nozzle. Then, it was revealed that the use of the multi-nozzle with many small holes rather than single large hole is useful to increase the gas entrainment if the total flow rate of the jets is the same.

对利用多喷嘴射流开发非冷凝气体自动吹扫系统进行了实验研究。实验是在常压条件下，在空气-水系统中进行的。实验参数包括喷嘴个数、喷嘴间距、喷嘴直径、水射流速度、多喷嘴与试管液面的距离和试管直径。结果表明，在喷嘴节距小于7 mm的情况下，从多个喷嘴喷出的射流相互连接，形成大射流。因此，多个喷嘴的气体夹带量与单个大喷嘴的几乎相同。另一方面，当喷嘴节距大于10 mm时，多喷嘴的射流独立撞击水面，且多喷嘴的卷吸气体大于单喷嘴。结果表明，在射流总流量相同的情况下，采用多个小孔的多喷嘴比采用单个大孔的喷嘴更有利于提高气体的夹带量。

项目成果

S.Esaki: "Characteristics of Gas Enfrained by Water Jet" Proceedings of the third Taipei-Kyushu Joiut Sympsioum on Chemical Engineering,1999. 137-139 (1999)

S.Esaki：“水射流所夹带的气体的特性”第三届台北-九州化学工程研讨会论文集，1999年。

Shuji ESAKI: "Characteristics of Gas Entrainment in a Tube with Liquid Jet"Proceeding of the Third International Conference on Fluid Mechanics and Heat Transfer. 276-282 (1999)

Shuji ESAKI：“液体射流管内气体夹带的特性”第三届国际流体力学与传热会议论文集。

Shuji ESAKI: "Characteristics of Gas Entrainment in a Tube with Liquid Jet"Proceedings of the Third International Conference on Fluid Mechanics and Heat Transfer. 276-282 (1999)

Shuji ESAKI：“液体射流管内气体夹带的特性”第三届国际流体力学与传热会议论文集。