Effects of Properties and Behavior of Particles Laden with High Temperature Gas Flow on the Heat Transfer Augmentation and Control
载有高温气流的颗粒的性质和行为对传热增强和控制的影响
基本信息
- 批准号:03402030
- 负责人:
- 金额:$ 10.75万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for General Scientific Research (A)
- 财政年份:1991
- 资助国家:日本
- 起止时间:1991 至 1993
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
In the present research project, effects of the properties and behavior of the particles laden with a gas-solid suspension flow on the radiation heat transfer were examined. The results are summarized into the followings :1. Penetration of Radiation within a Fluidized Particle Layr. First of all, radiation transfer from a surface immersed in a fluidized bed was experimentally examined ; a monochromatic laser light was projected into the fluidized particles through the surface, and intensity distributions of the laser light were measured within the particles. The results showed that the radiation penetration depth in the particle emulsion is relatively small, but that the radiation is hardly scattered by the "bubble phase" of fluidized particles. These results suggests that the radiation transfer from a heat transfer surface to fluidized particles is dominated by the relation between the thickness of thermal boundary layr on the surface and the radiation penetration depth of particles.2 … More . Radiation Emitted from the Fluidized Particles Adjacent to the Heat Transfer Surface. Radiation emitted from the fluidized particles adjacent to a heat transfer surface was measured by means of IR thermography ; fluidized particles were heated from a heat transfer surface, which was a transparent for the IR radiation, and intensity of the radiation emitted from the particles was measured by a IR thermo-camera. The results showed that the radiation emitted from the heated particles decreases with increasing the fluidizing gas flow rate, i.e. void fraction of the fluidized particles, and that the intensity of radiation increases as the fluidized particles become "black" for IR radiation. These results mean that the heat transfer augmentation due to radiation in a high-temperature gas-solid suspension flow is evident when the particles are dilute and transparent for radiation.3. Experimental Evaluation of Radiation Heat Transfer in a Fluidized Bed. In order to confirm the results described above, radiation heat transfer between a high-temperature heat transfer surface and fluidized particles was experimentally examined ; particles of three different materials were used so as to examine the effects of particle emissivity. Heat transfer surfaces of two different emissivity, which were heated upto 1200 K, were used for evaluating the radiation heat transfer from the heat transfer surface. The experimental results showed that, under our experimental conditions, evident radiation heat transfer was observed only when the alumina particles, which are relatively transparent for IR radiation, were used. This result coincides well with the ones estimated in our stury described above. In addition to these, heat transfer of a circulating fluidized particle cell was examined so as to develop the control technique for void fraction distribution of the fluidized particles adjacent to the heat transfer surface, which dominates the radiative heat transfer from or to the fluidized particles. Less
本文研究了气固两相悬浮流中颗粒的性质和行为对辐射换热的影响。主要研究结果如下:1.辐射在流化颗粒层中的穿透。首先,从浸没在流化床中的表面的辐射传递进行了实验研究;单色激光通过表面投射到流化颗粒中,并测量颗粒内激光的强度分布。结果表明,辐射在颗粒乳状液中的穿透深度较小,但辐射几乎不被流化颗粒的“气泡相”散射。这些结果表明,传热表面对流化颗粒的辐射传递受传热表面热边界层厚度与颗粒辐射穿透深度的关系所支配。 ...更多信息 .传热表面附近流化颗粒的辐射。通过红外热成像法测量邻近传热表面的流化颗粒发射的辐射;从传热表面加热流化颗粒,该传热表面对红外辐射透明,并且通过红外热成像仪测量颗粒发射的辐射强度。相机。结果表明,随着流化气流量的增加,颗粒的红外辐射强度降低,而随着流化气流量的增加,颗粒的红外辐射强度增加。这些结果表明,当颗粒浓度较低且对辐射透明时,高温气固悬浮流中的辐射强化传热效果明显.流化床内辐射传热的实验评价。为了证实上述结果,高温传热表面和流化颗粒之间的辐射传热进行了实验研究;使用三种不同材料的颗粒,以检查颗粒发射率的影响。两个不同的发射率,这是加热到1200 K的传热表面,用于评估从传热表面的辐射传热。实验结果表明,在我们的实验条件下,只有当使用氧化铝颗粒,这是相对透明的红外辐射,观察到明显的辐射传热。这一结果与我们在上述研究中估计的结果吻合得很好。此外,还研究了循环流化颗粒单元的传热,以开发控制传热表面附近流化颗粒空隙率分布的技术,该技术控制来自或到流化颗粒的辐射传热。少
项目成果
期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Yamada, et al.: "Radiation Heat Exchange between Fluidized Particles and Heated Surface in a Fluidized Bed" Trans.JSME. (to be published). (1994)
Yamada 等人:“流化床中流化颗粒与加热表面之间的辐射热交换”Trans.JSME。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Kurosaki, et al.: "Radiation Transfer in a High Temperature fluidized Bed" Proc.29th National Heat Transfer Symposium of Japan. 583-584 (1992)
Kurosaki 等人:“高温流化床中的辐射传递”,第 29 届日本全国传热研讨会论文集。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
山田 純 他3名: "流動層における流動粒子群-伝熱面間のふく射熱交換" 日本機械学会論文集. (掲載予定). (1994)
Jun Yamada 等 3 人:“流化床中流化颗粒与传热表面之间的辐射热交换”日本机械工程师学会会议记录(待出版)(1994 年)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
黒崎 晏夫: "高温流動層内のふく射伝播モデルとその評価" 第29回日本伝熱シンポジウム講演論文集.
Akio Kurosaki:“高温流化床中的辐射传播模型及其评估”第29届日本传热研讨会论文集。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
山田 純 他2名: "流動層熱交換器における伝熱面近傍の粒子温度の可視化" 日本機械学会講演論文集. 930-76. 171-173 (1993)
Jun Yamada 和其他 2 人:“流化床换热器传热表面附近的颗粒温度可视化”,日本机械工程师学会会议记录 930-76 (1993)。
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- 影响因子:0
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KUROSAKI Yasuo其他文献
KUROSAKI Yasuo的其他文献
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{{ truncateString('KUROSAKI Yasuo', 18)}}的其他基金
A study on CO2 laser welding of porous plastics assisted by heat transfer control using a sold heat sink
使用出售散热器辅助传热控制的 CO2 激光焊接多孔塑料的研究
- 批准号:
21560203 - 财政年份:2009
- 资助金额:
$ 10.75万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
A Study on CO Laser Welding of Hard-to-joint Plastics Assisted by a New Heat Transfer Technique using a Transparent Solid Heat Sink
透明固体热沉辅助新型传热技术 CO 激光焊接难接塑料的研究
- 批准号:
19560196 - 财政年份:2007
- 资助金额:
$ 10.75万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
A Study on CO2 Laser Butt Welding of Plastics by Heat Transfer Control Using a Heat Sink
采用散热器传热控制的 CO2 激光塑料对接焊研究
- 批准号:
17560175 - 财政年份:2005
- 资助金额:
$ 10.75万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Pheology and Heat Transfer Control of Microscale Instability Phenomena on Injection Molded Polymer Surfaces
注塑聚合物表面微观不稳定性现象的流变学和传热控制
- 批准号:
09450086 - 财政年份:1997
- 资助金额:
$ 10.75万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
A Study of Super Precise Injection Molding Technique Assisted by Radiation Energy
辐射能辅助超精密注射成型技术研究
- 批准号:
08555052 - 财政年份:1996
- 资助金额:
$ 10.75万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Synthetic Study on the Techniques for Storage/Conveyance/Utilization of Cold Energy using Phase-Change Phenomena
利用相变现象综合研究冷能储存/输送/利用技术
- 批准号:
06302037 - 财政年份:1994
- 资助金额:
$ 10.75万 - 项目类别:
Grant-in-Aid for Co-operative Research (A)
Study on Quality Improvement Techniques for Injection-Molding of Polymer Utilizing Heat Transfer Control
利用传热控制的聚合物注射成型质量改进技术研究
- 批准号:
06555058 - 财政年份:1994
- 资助金额:
$ 10.75万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research (B)
HIGH-PRECISION MEASUREMENT AND ACTIVE CONTROL OF SOLIDIFICATION
高精度测量和主动控制凝固
- 批准号:
05239104 - 财政年份:1993
- 资助金额:
$ 10.75万 - 项目类别:
Grant-in-Aid for Scientific Research on Priority Areas
Technologies for Quality Improvement of the Injection Molded Polymer Products Utilizing the Heat Transfer Control Technique
利用传热控制技术提高注塑聚合物产品质量的技术
- 批准号:
03555041 - 财政年份:1991
- 资助金额:
$ 10.75万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research (B)
STUDY ON PNEUMATIC CONVEYANCE OF COLD ENERGY USING A PHASE-CHANGE MATERIAL ENCLOSED IN SMALL SPHERICAL CAPSULES
小球囊内相变材料气力输送冷能的研究
- 批准号:
63850044 - 财政年份:1988
- 资助金额:
$ 10.75万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research
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Tunable Super-Planckian Near-field Radiative Heat Transfer with Thermochromic Metamaterials
使用热致变色超材料的可调谐超普朗克近场辐射传热
- 批准号:
2212342 - 财政年份:2022
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