Development of optimum cooling systemn of water spraying for a high temperature metal
高温金属最佳喷水冷却系统的研制
基本信息
- 批准号:04555163
- 负责人:
- 金额:$ 5.18万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Developmental Scientific Research (B)
- 财政年份:1992
- 资助国家:日本
- 起止时间:1992 至 1993
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
We believe that the intially anticipated purpose of this research has been attained for the most part. This research basically covers a few special fields such as computational fluid dynamics, two-phase flow theory, heat transfer and numerical analysis, and therefore the research consists of the three stages. The results obtained here are summarized as follows :First, the nozzle frow of a two-phase mixture composed of air and water droplets, the flow mechanism of the two-phase free jet and the flow behavior of the two-phase freejet impinging on a flat plate have been unmerically analyzed. However, the deformation process of droplets impinging even a flat plate with an ordinary room temperature has not yet been clarified regardless of the challenge of many researchers. Hence, the numerical model to assess the deformation process has been established by our research group. Also, it has been confirmed that the deformation process calculated by the present model is in fairly good agreement … More with experimental data. The paper concerned with this result has been submitted to the Trans. ASME Journal of Fluids Engineering for publication.Second, it has been experimentally clarified that the deformation behavior of droplets impinging on a hot plate surface beyond the Leidenfrost point can be classified into three kinds of patterns. Basically, the droplet deformation behavior may be classified into two kinds of patterns according to whether the droplet crushes or not after the collision with the plate surface. Taking into account the configuration of droplet of the case where the droplet does not crush, there seems to be three kinds of patterns. The condition whether the droplet crushes or otherwise is dependent not only upon the We number, but also upon the surface temperature and properties etc.. Also, we have clarified the overall mechanism of the crushed and deformation for each pattern, although it is not theoretical but empirical.Third, the estimation of cooling process of a hot plate surface beyond the Leidenfrost temperature by water spray have considered so that the assess of the cooling intensity is available for an actual operation in the secondary cooling zone of the continuous casting process. In order to do so, the high temperature metal surface has been cooled by many kinds of water sprays of which the water flow rate is entirely different from each other and each temperature process with time has been measured by the CA thermocouples. Thereby, the predictable modeling for cooling process of a hot plate by a water spray has been constructed by the inverse analysis.Finally, we think that there are a number of problems which remains unsolved and wish to promote the present investigation further. Less
我们相信这项研究的最初预期目的已经大部分达到。本课题的研究基本上涵盖了计算流体力学、两相流理论、传热学和数值分析等几个专业领域,因此研究分为三个阶段。本文的主要研究成果如下:首先,对空气-水滴两相混合物的喷嘴流场、两相自由射流的流动机理以及两相自由射流冲击平板的流动特性进行了数值分析。然而,尽管许多研究人员提出了挑战,但即使是在普通室温下,液滴撞击平板的变形过程也尚未得到澄清。因此,本课题组建立了评价变形过程的数值模型。此外,还证实了本模型计算的变形过程是相当吻合的 ...更多信息 实验数据。有关这一结果的论文已提交给美国机械工程师协会(ASME)《流体工程学报》(Journal of Fluids Engineering)发表。其次,通过实验阐明了液滴撞击在莱顿弗罗斯特点以上的热板表面上的变形行为可分为三种模式。基本上,根据液滴与板表面碰撞后是否破碎,液滴变形行为可以分为两种模式。考虑到液滴不破碎的情况下的液滴构造,似乎存在三种图案。液滴破碎与否不仅取决于We数,还取决于表面温度和性质等。此外,我们还澄清了每种模式的破碎和变形的整体机制,虽然它不是理论的,但经验。第三,热板表面超过莱顿弗罗斯特温度的喷水冷却过程的估计已经考虑,以便评估冷却强度的连铸过程中的二冷区的实际操作。为了达到这一目的,高温金属表面被多种不同水流量的水喷雾冷却,并且用CA热电偶测量了每种温度随时间的变化过程。由此,通过反分析建立了热板喷水冷却过程的预测模型。最后,我们认为还有一些问题有待进一步研究。少
项目成果
期刊论文数量(16)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
八田夏夫: "Numerical analysis of flow pattern of impinging liquid sprays in a cold model for cooling a hot flat plate" Applied Scientific Research. 50. 129-147 (1993)
Natsuo Hatta:“用于冷却热平板的冷模型中冲击液体喷雾流动模式的数值分析”应用科学研究50。129-147(1993)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
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- 通讯作者:
八田夏夫: "Numerical Analysis of Flow Pattern of Impinging Liquid Sprays in a Cold Model for Cooling a Hot Flat Plate" Applied Scientific Research(Kluwer Academic Publishers). 50. 129-147 (1993)
Natsuo Hatta:“用于冷却热平板的冷模型中冲击液体喷雾流型的数值分析”应用科学研究(Kluwer 学术出版社)。50. 129-147 (1993)。
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- 影响因子:0
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八田夏夫: "Numerical Analysis of Gas-Particle Two-Phase Subsonic Freejets" Trans.ASME Journal of Fluids Engineering. 114. 420-429 (1992)
Natsuo Hatta:“气体粒子两相亚音速自由射流的数值分析”Trans.ASME 流体工程杂志 114. 420-429 (1992)
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- 影响因子:0
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- 通讯作者:
Natsuo Hatta, Jun-ichi Kokado and Shin Yabusita: "Removal of Fine Particles from Porous Ores by Pneumatic Classifier of Horizontal Type" Trans.Instin.Min.Metall.(Sect C : Mineral Process. Extr.Metall.). 102. 139-148 (1993)
Natsuo Hatta、Jun-ichi Kokado 和 Shin Yabusita:“通过卧式气动分级机去除多孔矿石中的细颗粒”Trans.Instin.Min.Metall。(C 部分:矿物加工。Extr.Metall。)。
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- 影响因子:0
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宅田裕彦: "Mechanical Properties of Type 304 Stainless Steel Sheet Produced by Twin-Roll Strip Casting Process" Steel Research(Arch.f.Eisenfuettennes). 64. 132-135 (1993)
Hirohiko Takuda:“双辊带材连铸工艺生产的 304 型不锈钢板的机械性能”《钢铁研究》(Arch.f.Eisenfuettennes) 64. 132-135 (1993)。
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HATTA Natsuo其他文献
HATTA Natsuo的其他文献
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{{ truncateString('HATTA Natsuo', 18)}}的其他基金
Deformation behavior of a liquid droplet impinging on hot metallic surfaces above the Leidenfrost temperature
莱顿弗罗斯特温度以上液滴撞击热金属表面的变形行为
- 批准号:
07455287 - 财政年份:1995
- 资助金额:
$ 5.18万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Prediction and control of powder entrapping at meniscus of molten steel in a continuous casting mold
连铸结晶器钢水弯月面夹粉预测与控制
- 批准号:
07555519 - 财政年份:1995
- 资助金额:
$ 5.18万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Prediction and control of flow properties and cooling process for a hot strip on a runout table by water film
利用水膜预测和控制热轧带材在跳动台上的流动特性和冷却过程
- 批准号:
04452272 - 财政年份:1992
- 资助金额:
$ 5.18万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
Capacity and Estimation on Liquid Spray Cooling on a Hot Surface of Just Solidified Steel Shell.
刚凝固钢壳热表面液体喷雾冷却的能力和估算。
- 批准号:
01550532 - 财政年份:1989
- 资助金额:
$ 5.18万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
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