刘振华
纳米流体在强化传热中的应用
个性化签名
- 姓名:刘振华
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
工程热物理
- 研究兴趣:纳米流体在强化传热中的应用
刘振华:博士,教授/博士生导师
个人简历:
1982年7月 毕业于西安交通大学动力二系.同时考取国家教育部出国研究生.
1983年10月 赴日留学
1989年3月 获日本九州大学工学博士.
1989年4月至1991年3月 日本三菱汽车公司进行博士后研究.
1991年4月至1993年3月 日本大分大学任教.
1993年6月归国至今 任教于上海交通大学.
研究方向:纳米流体在强化传热中的应用
在研项目:
1. 纳米流体在微小通道内的流动与强制对流传热特性研究,上海市科委重点基础研究项目2 超亲水表面喷流沸腾极限热流密度研究,教育部博士点基金项目
3 高温太阳能集热器开发,横向课题,江苏桑夏太阳能产业技术公司
专著论文:
已在国内外刊物上发表论文120余篇, 其中SCI,EI国际刊物论文近70篇。获4项发明专利授权,正在申请6项发明专利。
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主页访问
1611
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关注数
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成果阅读
467
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成果数
12
【期刊论文】Study on film boiling heat transfer for water jet impinging on high temperature flat plate
刘振华, Zhen-Hua Liu*, Jing Wang
International Journal of Heat and Mass Transfer 44(2001)2475-2481,-0001,():
-1年11月30日
An theoretical and experimental study on film boiling heat transfer for water jet impinging on the horizontal high temperature flat plate is performed for the jet stagnation zone. Simplified two-phase flow boundary layer equations were used to calculate the thickness of the vapor layer and from it the heat transfer coefficient of film boiling is obtained. A semi-empirical correlation is proposed for predicting the heat transfer coefficient of film boiling.
Film boiling, Two-phase flow, Water jet impinging cooling, Stagnation heat transfer
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刘振华, Zhen-Hua Liu, Qun-Zhi Zhu
Journal of Heat Transfer DECEMBER 2002, Vol. 124,-0001,():
-1年11月30日
A theoretical analysis and an experimental investigation were carried out for predicting the critical heat flux (CHF) of convective boiling for a round saturated water jet impinging on the jet stagnation zone. The model of the maximum liquid subfilm thickness based on the Helmholtz instability is used to derive a semi-theoretical equation and the correlation factor was determined from the experimental data. Finally, a semi-theoretical correlation was proposed for predicting CHF of convective boiling for saturated water jet impinging on the jet stagnation zone.
Boiling,, Evaporation,, Forced Convection,, Heat Transfer,, Jets
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刘振华, Zhen-Hua Liu, Tie-Feng Tong, Yu-Hao Qiu
Journal of Heat Transfer APRIL 2004, Vol. 126,-0001,():
-1年11月30日
An experimental investigation was carried out for predicting the critical heat flux (CHF) of steady boiling for a round subcooled water jet impingement on the flat stagnation zone. The experimental data were measured in a steady nucleate boiling state. Three main influencing parameters, i.e., subcooling, impact velocity and jet nozzle size were widely changed and their effects on the critical heat flux were systemically studied. An empirical correlation was obtained using the experimental data over a wide experimental range for predicting the critical heat flux of steady boiling for a round subcooled water jet impingement on the flat stagnation zone.
Boiling,, Experimental,, Heat Transfer,, Impingement,, Jets
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刘振华, Yu-hao Qiu, Zhen-hua Liu *
International Journal of Heat and Mass Transfer 48(2005)4590-4597,-0001,():
-1年11月30日
An experimental investigation was carried out for predicting the critical heat flux (CHF) of convective boiling of saturated liquids for a round jet impinging on the horizontal jet stagnation zone. The model of maximum liquid subfilm thickness based on the Helmholtz instability was used to derive a semi-theoretical equation. The experimental data of four liquids: water, ethanol, R-113 and R-11 were employed to determine the correlation factor. The impact velocity ranged from 0.5m/s to 10 m/s and the diameters of the jet nozzle ranged from 3 mm to 10 mm. A semi-theoretical correlation was proposed for predicting CHF of convective boiling for saturated liquids jet impinging on the stagnation zone in a wide range.
Boiling, Evaporation, Jets, Heat transfer, CHF
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刘振华, Zhenhua Liu, Yuhao Qiu
Transactions of the ASME Vol. 128, JULY 2006,-0001,():
-1年11月30日
The nucleate boiling heat transfer characteristics of a round water jet impingement in a flat stagnation zone on the superhydrophilic surface were experimentally investigated. The superhydrophilic heat transfer surface was formed by a TiO2 coating process. The experimental results were compared with those on the common metal surface. In particular, the quantificational effects of the flow conditions, heating conditions, and the coating methods on the critical heat flux (CHF) were systemically investigated. The experimental data showed that the nucleate boiling heat transfer characteristics on the superhydrophilic surface are significantly different from those on the common metal surface. The CHF of boiling on the superhydrophilic surface is greatly increased by decreasing of the solid-liquid contact angle.
jet,, boiling,, CHF,, superhydrophilic surface
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【期刊论文】Boiling heat transfer characteristics of nanofluids jet impingement on a plate surface
刘振华, Zhen-Hua Liu • Yu-Hao Qiu
Heat Mass Transfer (2007)43: 699-706,-0001,():
-1年11月30日
The jet boiling heat transfer of a bar water-CuO particle suspensions (nanofluids) jet impingement on a large flat surface was experimentally investigated. The experimental results were compared with those from water. The quantificational effects of the nanoparticles concentration and the flow conditions on the nucleate boiling heat transfer and the critical heat flux (CHF) were investigated. The experimental data showed that the jet boiling heat transfer for the water-CuO nanofluid is significantly different from those for water. The nanofluids have poor nucleate boiling heat transfer compared with the base fluid due to that a very thin nanoparticle sorption layer was formed on the heated surface. The CHF for the nanofluid increased compared with that of water. The reasons were that the solid-liquid contact angle decreased due to a very thin sorption layer on the heated surface and the jet and agitating effect of the nanoparticles on the subfilm layer enhance supply of liquid to the surface.
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【期刊论文】Effect of nanoparticles in nanofluid on thermal performance in a miniature thermosyphon
刘振华, Zhen Hua Liu, a*, Xue Fei Yang, and Guang Liang Guo
JOURNAL OF APPLIED PHYSICS 102, 013526(2007),-0001,():
-1年11月30日
An experiment was performed to investigate the effect of nanoparticles in the nanofluid on the thermal performance in a miniature thermosyphon. The nanofluids consisted of de-ionized water and CuO nanoparticles having an average size of 30 nm. The experimental results show that the water-CuO nanofluids can greatly enhance the boiling heat transfer performance of the evaporator in thermosyphon compared with that using water at subatmospheric pressure conditions. A much lower and more uniform wall temperature of the thermosyphon can be obtained by substituting the nanofluids for water. Boiling heat transfer coefficients and the critical heat flux (CHF) of the nanofluids in the evaporator of the thermosyphon have significant increase compared with those of de-ionized water. There was an optimal mass concentration which was estimated to be 1.0 wt% to achieve the maximum heat transfer performance. Operating pressure has very remarkable influences on both the heat transfer coefficients and the CHF of nanofluids, which greatly increase with the decrease of the test pressure. The heat transfer coefficient and the CHF can increase, respectively, about 160% and 120% at the pressure of 7.45 kPa compared with those of water. The experimental study confirmed that the heat transfer performance of the miniature thermosyphon can evidently be strengthened by using water-CuO nanofluids.
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刘振华, Liang Liao Æ Zhen-Hua Liu
Heat Mass Transfer (2009)45: 1129-1136,-0001,():
-1年11月30日
This study paid attention to the effect of fluid temperatures on the forced convective flow drag and heat transfer characteristics of multi-wall carbon nanotube (MWNTs)-water suspensions without any surfactants. The experiments were carried out under the two fixed average fluid temperatures of 29 and 58 C. A horizontal small stainless steel tube with an inner diameter of 1.02 mm was used as the test section. The experiment results show that the flow drag characteristics of suspensions are almost the same as those of water. While the heat transfer of MWNTs suspensions with high mass concentration or high fluid temperature is significantly enhanced. The fluid temperature does not affect flow drag characteristics but has great effect on the heat transfer characteristics. Nanometer characteristics are presented by suspensions with high MWNT mass concentration or high temperature on convective heat transfer.
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刘振华, Yu-hao Qiu, Zhen-hua Liu *
International Journal of Heat and Mass Transfer 53(2010)1921-1926,-0001,():
-1年11月30日
A theoretical simulation was carried out for predicting the critical heat flux (CHF) of convective boiling for a round saturated water jet impingement on the stagnation zone of a hot surface. The study was focused on the effect of the solid–liquid contact angle on the CHF. A theoretical model based on the Long wave instability was applied to calculate the maximum liquid sub-film thickness under boiling bubbles and finally a semi-empirical and semi-theoretical correlation was proposed by combining the simulated calculation and the experimental data from the common metal heating surface. The correlation revealed the comprehensive effects of solid–liquid contact angles, jet velocity and jet diameter on the CHF and agreed well with the experimental data proposed by authors in the previous study.
Jet Boiling Critical heat flux Solid-liquid contact angle Simulation
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【期刊论文】Influence of carbon nanotube suspension on the thermal performance of a miniature thermosyphon
刘振华, Zhen-hua Liu *, Xue-fei Yang, Guo-san Wang, Guang-liang Guo
International Journal of Heat and Mass Transfer 53(2010)1914-1920,-0001,():
-1年11月30日
An experimental study was carried out to understand the heat transfer performance of a miniature thermosyphon using water-based carbon nanotube (CNT) suspensions as the working fluid. The suspensions consisted of deionized water and multi-wall carbon nanotubes with an average diameter of 15 nm and a length range of 5-15 lm. Experiments were performed under three steady operation pressures of 7.4 kPa, 13.2 kPa and 20 kPa, respectively. Effects of the CNT mass concentration and the operation pressure on the average evaporation and condensation heat transfer coefficients, the critical heat flux and the total heat resistance of the thermosyphon were investigated and discussed. Experimental results show that CNT suspensions can apparently improve the thermal performance of the thermosyphon and there is an optimal CNT mass concentration (about 2.0%) to achieve the maximum heat transfer enhancement. The operation pressure has a significant influence on the enhancement of the evaporation heat transfer coefficient, and slight influences on the enhancement of the critical heat flux. The enhanced heat transfer effect is weak at low heat fluxes while it is increased gradually with increasing the heat flux. The present experiment confirms that the thermal performance of a miniature thermosyphon can be strengthened evidently by using CNT suspensions.
Nanoparticle Carbon nanotube Nanofluid Heat pipe Boiling heat transfer
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