赵耀华
地下建筑火灾科学与工程；太阳能中温集热技术；蓄能技术；节能与绿色能源建筑体系；建筑能耗实时分析与智能化控制技术；微传热传质机理以及高性能电子芯片散热技术；强化传热传质技术等。
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 姓名：赵耀华
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学术头衔：
博士生导师
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学科领域：
工程热物理
 研究兴趣：地下建筑火灾科学与工程；太阳能中温集热技术；蓄能技术；节能与绿色能源建筑体系；建筑能耗实时分析与智能化控制技术；微传热传质机理以及高性能电子芯片散热技术；强化传热传质技术等。
赵耀华，男，1964年10月出生，湖南省澧县人。1986年7月毕业于北京大学力学系流体力学专业，1989年7月在北京工业大学获工学硕士学位后留校工作。1992年1月获日本政府奖学金留学日本，并于1996年3月获日本九州工业大学博士学位。1996年4月开始，分别在日本九州大学、东京大学及九州工业大学历任助教授（1年）、特别研究员（2年）及副教授（6年）。2000年12月入选中科院工程热物理研究所”百人计划”、研究员、传热传质研究部部长。国家“863”后续能源项目副首席科学家。并于2005年5月作为北京市特聘教授，受聘于北京工业大学建筑工程学院。历任日本多相流学会国际交流委员会委员及日本污泥处理研究会技术顾问等职。
多年从事传热传质及强化传热基础研究、节能与新能源技术的开发研究以及地下快速道路的火灾科学与工程的关键技术研究等。先后发表学术论文160余篇，其中SCI、EI论文50多篇。专利12项。
突出的研究成果有：1）沸腾传热传质的机理方面:否定了著名的流体动力学不稳定理论（美国，Zuber）及厚液层蒸干理论（日本，Katto），提出了动态微液层蒸发模型。该模型能很好地予测出从充分发展的核沸腾到包括最小热负荷在内的沸腾曲线，并解决了液体接触角及微重力对传热的影响、高速加热过程所出现的由非沸腾状态到膜沸腾的直接迁移、过冷沸腾临界热负荷以及窄空间沸腾临界热负荷等等重要问题；2）回旋流输运技术：与日本合作者共同开发的光纤等远距离套管内减阻敷设、药品的管内减损（或无损）输运、球形半导体材料在管内的无接触输运技术等；3）开发了太阳能碟式高温集热及热发电技术；4）首次可视化实验验证了微管内湍流提前发生；5）开发出了高性能相变式微型散热系统；6）建立了大尺度地铁火灾模拟实验平台以及地铁及地下公路火灾烟气防控关键技术等等。
目前主要的研究内容为：地下建筑火灾科学与工程；太阳能中温集热技术；蓄能技术；节能与绿色能源建筑体系；建筑能耗实时分析与智能化控制技术；微传热传质机理以及高性能电子芯片散热技术；强化传热传质技术等。

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20
【期刊论文】A Novel Micro Cooling System for Electronic Devices Using a Micro Capillary Groove Evaporator
赵耀华， HU XUEGONG， ZHAO YAOHUA， YAN XIAOHONG， TSURUTAT
Journal of Enbanced Heat Transfer, 11 (4) 407415 (2004)，0001，（）：
1年11月30日
In the presented study, a novel micro cooling system for electronic devices using a micro capillary groove evaporator was proposed. Based on experimental data in open(atmospheric) condition, we found that liquid level has an obvious influence on evaporating heat flux. For a given liquid level, there exists an optimum groove size, which maximizes evaporation heat transfer capacity. By using the optimum groove sizes in the open condition, two types of closed cooling sytems for CPU chips for personal computers were designed: one was for desktop models and the other for notebook models. Their cooling performance to keep CUP chip temperature belos 90℃ reached 3.35×105W/m2 and 2.51×105W/m2,respectively, for the desktop model by using ethanol and the notebook model by using methanol. Experimental results show that the maximum cooling capacities strongly depend on the condensation capacities of condensers in the closed cooling systems and volume fractions of working liquid in the evaporators.
Micro cooling system， evaporation， micro capillary grooves， liquid level， volume fraction

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【期刊论文】BIFURCATION OF FLOW AND MASS TRANSPORT IN A CURVED BLOOD VESSEL
赵耀华， TAN Wenchang， ， WEI Lan， ZHAO Yaohua， TAKASHI Masuoka
ACTA MECHANICA SINICA, Vol. 19, No. 4, August 2003，0001，（）：
1年11月30日
A numerical analysis of flow and concentration fields of macromolecules in a slightly curved blood vessel was carried out. Based on these results, the effect of the bifurcation of a flow on the mass transport in a curved blood vessel was discussed. The macromolecules turned out to be easier to deposit in the inner part of the curved blood vessel near the critical Dean number. Once the Dean number is higher than the critical number, the bifurcation of the flow appears. This bifurcation can prevent macromolecules from concentrating in the inner part of the curved blood vessel. This result is helpful for understanding the possible correlations between the blood dynamics and atherosclerosis.
Curved blood vessel， bifurcation of flow， steady flow， mass transfer

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【期刊论文】Conjugated Heat Transfer on a Horizontal Surface Impinged by Circular FreeSurface Liquid Jet
赵耀华， Yaohua ZAHO， Takashi MASUOKA， Takaharu TSURTA， ChongFang MA
JSME International Journal Series B, Vol. 45, No. 2, 2002，0001，（）：
1年11月30日
Analytical research was conducted to study the heat transfer from horizontal surfaces to normally impinging circular freesurface jets under arbitraryheatflux conditions. General expressions of heat transfer coefficients and recovery factor were obtained in the stagnation region and boundary layer region as well as viscous similarity region by the integral method. Then by using the analytical results, the conjugated heat transfer between a water jet and the impinged wall was numerically solved. Finally, an experimental study was also performed to characterize conjugated heat transfer coefficient on a thick copper target base impinged normally by circular freesurface jet. The present predictions of the mean conjugated heat transfer coefficient were good agreement with the experimental data.
Jet Impingement， Convective Heat Transfer， Boundary Layer Theory

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【期刊论文】Critical Heat Flux of Boiling Heat Transfer in a Confined Space
赵耀华， YaoHua ZAHO， ， Takaharu TSURUTA， Takashi MASUOKA
JSME International Journal Series B, Vol. 44, No. 3, 2001，0001，（）：
1年11月30日
The critical heat flux(CHF) is studied in a confined space both experimentally and analytically. The confined space is consisted of two horizontal surfaces with the lower surface heated and the upper mesh screen. The observation shows that the behaviors of the vapor mushroom over the mesh screen have not significant differences with that in the conventional pool boiling. However, the CHF reduces with the decrease of the space gap when it is narrower than someone critical value. The theoretical analyses show that the reduced CHF is related to the earlier dryout of macrolayer during the period of vapor mushroom because the initial thickness of the macrolayer reduces with the decrease of the space gap. However, for larger enough space, the CHF is reached due to the crisis of the local heat transfer by the microlayer model but not the macrolayer dryout. Analyses show that the heat transfer crisis(CHF) causedby the macrolayer dryout occurs only in advance of that by the microlyer model and the conventional macrolayer dryout model is a special case of the microlayer model. Theoretic prediction of CHF agrees reasonable well with experimental data.
Critical Heat Flux， Boiling Heat Transfer， Confined Space， Microlayer Model， TwoPhase Flow

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【期刊论文】Critical Heat Flux Prediction of Subcooled Pool Boiling Based on the Microlayer Model
赵耀华， YaoHua ZAHO， Takaharu TSURUTA， Takashi MASUOKA
JSME Series B, Vol. 45, No. 3, 2002，0001，（）：
1年11月30日
The critical heat flux (CHF) of subcooled boiling is theoretically predicted by means of the microlayer model. The enhancement of heat transfer for subcooled boiling is mainly due to the augmented heat convection caused by the forming and collapsing of individual bubbles. For a uniform heat flux surface, CHF approaches a constant in the high subcooling region. For a uniform temperature surface, CHF increases with the subcooling. The evaporative heat transfer becomes small and the total heat flux is mainly due to the heat conduction outside the evaporating area as the subcooling is increased. The boiling crisis(CHF) is caused by the local dryout of microlayer at low subcooling and by the rapid increase of the duration of bubble condensation with the increase of wall superheat at high subcooling.
Critical Heat Flux， Subcooled Boiling， Pool Boiling， Microlayer Model， Boiling Heat Transfer

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【期刊论文】DECAY OF VORTEX VELOCITY AND DIFFUSION OF TEMPERATURE IN A GENERALIZED SECOND GRADE FLUID
赵耀华， SHEN Fang， ， TAN Wenchang， ZHAO Yaohua， T.Masuoka
Applied Mathematics and Mechanics Published by Shanghai University, (English Edition, Vol. 25, No. 10, Oct 2004) Shanghai, China，0001，（）：
1年11月30日
The fractional calculus approach in the constitutive relationship model of viscoelastic fluid was introduced. The velocity and temperature fields of the vortex flow of a generalized second fluid with fractional derivative model were described by fractional partial differential equations. Exact analytical solutions of these differetial equations were obtained by using the discrete Laplace transform of the sequential fractional derivatives and generalized MittagLeffler function. The influence of fractional coefficient on the decay of vortex velocity and diffusion of temperature was also analyzed.
Generalized second grade fluid， fractional calculus， unsteady flow， temperature field， generalized MittagLeffler function

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【期刊论文】Experimental study of nucleate boiling heat transfer enhancement in confined space
赵耀华， Yaohua Zhao， ， Takaharu Tsuruta， Chaoyue Ji
Y. Zhao et al. Experimental Thermal and Fluid Science 28 (2003) 916，0001，（）：
1年11月30日
Saturated nucleate boiling heat transfer and critical heat flux (CHF) were experimentally studied in a confined space which consisted of two horizontal surfaces with a lower heated surface and an upper mesh screen. The nucleate boiling heat transfer was much enhanced in such a confined space, because the mesh screen kept primary vapor bubbles forming coalescence bubble within the confined space in lower heat flux region and allowed the vapor bubble to easily escape from the confined space in higher heat flux region. Observation by a highspeed camera showed that the behaviors of vapor mushroom over the mesh screen were not significantly different from that in the unconfined pool boiling at higher heat flux. The peripheral conditions of the confined space had no obvious effects on the heat transfer characteristics. The experimental CHF data showed a good agreement with the theoretical predictions based on the microlayer model proposed by some of the present authors.
Saturated nucleate boiling， Boiling heat transfer， Confined space， Heat transfer enhancement， Vapor bubble References

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赵耀华， Zhigang Liu， Yaohua Zhao， Masahiro Takei
Heat Mass Transfer (2007) 43: 587594，0001，（）：
1年11月30日
Distilled water and nitrogen gas used as the working fluids flow through the stainless steel microtube with inner diameter 168 μm outer diameter 406 μm. Using the Joule heating, the wall temperature field photos of the microtube is acquired by employing an IR camera and the temperature and the volume flow rate of the inlet and the outlet of microtube are measured. A correlation between the axial wall heat conduction and the convective heat transfer is obtained by theoretical analysis based on the experimental results. The investigative results clearly show that the axial heat conduction can reduce the convective heat transfer in the stainless steel microtube and the decrement may reach 2% compared to the convective heat transfer when the working fluid is nitrogen gas, however, the decrement can be neglected for distilled water as the working fluid.

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【期刊论文】Experimental study on visualization of the flow field in microtube
赵耀华， LIU Zhigang， ZAHO Yaohua
Science in China Ser. E Engineering and Materials Science 2005 Vol. 48, No. 5 521529，0001，（）：
1年11月30日
An experimental study was conducted to visualize the flow field and confirm the transitional Reynolds number from laminar to turbulent flow, as distilled water flows through quartz glass microtubes with inner diameter 315 and 520 um. With gentian violet as colorant, the flow field pictures in the microtube, and therefore, is shot by a CCD camera with a microscope at different Reynolds numbers. Pressure drop data were also used to characterize the triction factor for those microtubes in the Reynolds number range of 2002300. The experimental results clearly showed that the flow in the microtube was the laminar state and the friction factors agreed well with the Poiseuille equations when the Reynolds number was low. As the Reynolds number was larger than 1200 and 1500 for the microtube with inner diameter 315 and 520um, respectively, the friction factor departed from the classical laminar solution due to the earlier transition from laminar to turbulent flow. The flow turned into full turbulent when the Reynolds number reached 15001800.
Vuisual experiment， microtube， microscale flow， friction factor， turbulent transition

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【期刊论文】Heat Transfer in Nucleate Pool Boiling of Binary and Ternary Refrigerant Mixtures
赵耀华， ZHAO yaohua， DIAO Yanhua， Takaharu Tsuruta， Nishikawa Hideo
Chinese J. Chem. Eng., 12 (3) 351356 (2004)，0001，（）：
1年11月30日
Heat transfer coefficients in nucleate pool boiling were measured on a horizontal copper surface for refrigerants, HFC134a, HFC32, and HFC125, their binary and ternary mixtures under saturated conditons at 0.9Mpa.Compared to pure components, both binary and ternary mixtures showed lower heat transfer coefficients. This deterioration was more pronounced as heat flux was increased. Experimental data were compared with some empirical and semiempirical correlations available in literature. For binary mixture, the accuracy of the correlations varied considerably with mixtures and the heat flux. Experimental data for HFC32/134a/125 were also compared with available correlated equation obtained by Theme. For ternary mixture, the boiling range of binary mixture comportant effects on boiling heat transfer coefficieats.
Pool boiling heat transfer， nucleate pool boiling， HFC134a， HFC32， HFC125

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