Transient boiling and pressure recovery in a vacuum vessel during cooling of a high temperature body with an impinging jet
用冲击射流冷却高温物体期间真空容器中的瞬态沸腾和压力恢复
基本信息
- 批准号:09650249
- 负责人:
- 金额:$ 1.79万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:1997
- 资助国家:日本
- 起止时间:1997 至 1998
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
An experimental study has been made on transient heat transfer during cooling of a high temperature (300゚C) cylindrical body mounted in a vacuum vessel with an impinging jet and then recovery of pressure in the vessel. The experiment was carried out for initial pressure of 500 to 1000 Pa, jet velocity of 1 to 15 m/s, jet diameter of 1 to 3 mm, and jet temperature of 10 to 90゚C using water as test liquid. Copper, brass and steel are used as test material in order to check effect of different thermal properties on the transient cooling. The following results are obtained :1. Characteristics of pressure recovery and heat transfer are categorized in to three regions asRegion A : The pressure recovery is dominated by flush evaporation of superheated liquid. This region finishes at a short time. The heat transfer rate from high temperature body is limited resulting into little evaporation of liquid of jet.Region B : The pressure recovery is influenced by amount of vapor generated by boiling … More on high temperature disk. Boiling area moves toward outer edge of disk surface with time.Region C : The pressure recovers to a corresponding state and is kept constant during which heat transfer from the surface becomes forced convective, only.2. The pressure recovery and heat transfer rate are strongly influenced by test material since the time at which wetting of the high temperature surface starts depends on thermal properties. The heat transfer rate from the surface would be controlled by thermal properties of material.3. A computation procedure is developed to estimate surface heat flux from transient temperature during cooling, although a time lag exist between surface and measuring points and then is not predicted accurate.4. A relationship between movement of boiling area and heat transfer rate is made clear, although a time lag between them exists.5. A model to predict pressure recovery from heat transfer rate during cooling is developed, showing that the value predicted is in good agreement with experimental one. Less
本文对高温(300 ℃)圆柱体在冲击射流作用下冷却并恢复压力过程中的瞬态传热进行了实验研究。实验条件为:初始压力为500 ~ 1000 Pa,射流速度为1 ~ 15 m/s,射流直径为1 ~ 3 mm,射流温度为10 ~ 90 ℃。采用铜、黄铜和钢作为试验材料,考察了不同热物性对瞬态冷却的影响。得到了以下结果:1.压力恢复和传热特性可分为三个区域:A区:压力恢复以过热液体的冲刷蒸发为主;这个区域在短时间内结束。高温体的传热速率有限,导致射流中液体蒸发量很小。区域B:压力恢复受沸腾产生的蒸汽量的影响 ...更多信息 在高温磁盘上。C区:压力恢复到相应的状态并保持恒定,在此期间,表面的传热仅为强迫对流.压力恢复和传热速率受测试材料的强烈影响,因为高温表面开始润湿的时间取决于热性能。表面的热传递速率受材料的热物性控制.虽然表面和测量点之间存在时间滞后,因此不能准确地预测表面热流密度,但是发展了一种计算程序,可以从冷却过程中的瞬态温度来估算表面热流密度.明确了沸腾区移动与传热速率之间的关系,但两者之间存在时滞.建立了一个由冷却过程中的传热量预测压力恢复的模型,该模型的预测值与实验值吻合良好。少
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
門出・Hasan・光武: "Inverse Heat Transfer Problems for Preclicting Heat Transfer during Ingress-of-Codaut-Accident" 1997 Symposim on Fusion Engineering. 200-203 (1997)
Kadode、Hasan 和 Mitsutake:“Ingress-of-Codaut-Accident 期间预制传热的逆传热问题”1997 年聚变工程研讨会 200-203 (1997)。
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- 影响因子:0
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- 通讯作者:
Monde, M., Mitsutake, Y.and Ushijima, H.: "Heat transfer during transient cooling of high temperature surface with an impinging jet" Proc.36th National Heat Transfer. (in press). (1999)
Monde, M.、Mitsutake, Y. 和 Ushijima, H.:“使用冲击射流对高温表面进行瞬态冷却期间的传热”Proc.36th National Heat Transfer。
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門出・Hasan・光武・岩本: "低圧容器内の高温面の衝突噴流冷却中の圧力上昇と熱伝達" 熱工学講演会講演論文集. No.97-25. 48-50 (1997)
Kadde、Hasan、Mitsutake、Iwamoto:“低压容器中高温表面的冲击喷射冷却过程中的压力上升和传热”,热力工程会议记录第 97-25 号(1997 年)。
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- 影响因子:0
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光武・門出・牛嶋: "衝突噴流による高温加熱面の非定常冷却伝熱特性" 第36回日本伝熱シンポジウム講演論文集. (印刷中). (1999)
Mitsutake、Kadode 和 Ushijima:“冲击射流的高温加热表面的非稳态冷却传热特性”第 36 届日本传热研讨会论文集(1999 年)。
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Monde, M., Hasan, Md, Mitsutake, Y.and Iwamoto, K.: "Analytical approach solution with laplace transformation to the inverse problem of heat conduction" Proc.Themal Engineering Conf.No.97-25. 177-179 (1997)
Monde, M.、Hasan, Md、Mitsutake, Y. 和 Iwamoto, K.:“利用拉普拉斯变换解决热传导逆问题的分析方法”Proc.Themal Engineering Conf.No.97-25。
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MONDE Masanori其他文献
MONDE Masanori的其他文献
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{{ truncateString('MONDE Masanori', 18)}}的其他基金
Understanding of thermal characterisitics of expansion of stable solid-liquid contact during quench of high temperature solid surface
高温固体表面淬火时稳定固液接触膨胀热特性的认识
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24560238 - 财政年份:2012
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$ 1.79万 - 项目类别:
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Homogeneous nucleation generation and stable wetting during quenching high temperature surface higher than Leidenfrost temperature
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Characteristics of heat transfer and homogeneous nucleation process during quenching high temperature surface with an impinging water jet
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17560189 - 财政年份:2005
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$ 1.79万 - 项目类别:
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13650231 - 财政年份:2001
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$ 1.79万 - 项目类别:
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Boiling heat transfer and critical heat flux in pool boiling of ammonia-water mixture
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11650229 - 财政年份:1999
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$ 1.79万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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03650188 - 财政年份:1991
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$ 1.79万 - 项目类别:
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Enhancement of heat transfer due to bubbles passing through a narrow vertical rectangular channel and its upper limit
气泡通过狭窄垂直矩形通道的传热强化及其上限
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62550160 - 财政年份:1987
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$ 1.79万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
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