章本照
曲线管道流动,多相流动,流动传热,流体力学有限元方法,海洋流体力学
个性化签名
- 姓名:章本照
- 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:
流动机械工程及流体动力工程
- 研究兴趣:曲线管道流动,多相流动,流动传热,流体力学有限元方法,海洋流体力学
浙江衢州人,浙江大学机械与能源工程学院力学系流体工程研究所教授,博士生导师。1956.9-1959.7 浙江省衢州第一中学读书(高中)1959.9―1965.7 北京大学数学系力学专业(六年制)读书1965.8―1978.12 北京大学力学系助教1979.1―1984.8 浙江大学力学系流体力学教研室讲师1984.9―1986.12 美国Howard大学访问学者1987.5―2002.12 浙江大学力学系流体力学教研室副主任,流体工程研究所副所长、所长1987.1―现在 浙江大学力学系流体工程研究所副教授、教授、博士生导师2. 学术兼职中国空气动力学会理事中国机械工程学会风机专业委员会副主任《空气动力学学报》编委浙江省力学学会理事、流体力学专业委员会主任《风机工程师》副主编3. 研究领域曲线管道流动,多相流动,流动传热,流体力学有限元方法,海洋流体力学
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576
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章本照, 印建安, 苏霄燕, 张金锁
,-0001,():
-1年11月30日
采用摄动方法求解了旋转环形截面弯管内的粘性流动,获得截面上轴向速度和二次流的二阶摄动解,系统地分析了主流速度、二次流动在科氏力(Coriolis force)和离心力(Centrifugal force)共同作用下特性的变化情况;结果表明:当旋转方向和轴向速度方向相同时二次流强度将被加强;当旋转方向和轴向速度相反时,二次流涡结构变的复杂,环形截面上最多可出现八个涡,当科氏力和离心力之比F≈−1.02时,二次流强度最弱。
弯曲管道,, 二次流动,, 摄动方法
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章本照, 张金锁, 常华章, 陈华军
空气动力学学报,2000,4(18):448~455,-0001,():
-1年11月30日
从曲线直角坐标系中的N-S方程出发,采用摄动方法求解了椭圆形截面螺旋管道内粘性流动。结果表明:一阶挠率项仅影响椭圆形截面上的二次流动,并不影响截面上轴向速度;当轴向压力梯度较小时,二次流动主要受挠率的影响,随着轴向压力梯度的增加,曲率的作用越来越强。
螺旋管道, 二次流, 摄动解
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章本照, 陈华军, 张金锁
,-0001,():
-1年11月30日
当管道绕任意轴旋转时,管道内的轴向速度分布发生改变,截面上产生二次流动,管道的对流换热特性将引起变化。本文对绕任意轴旋转的管道流动与换热进行了数值模拟,研究结果表明:绕任意轴旋转管道内的对流换热特性主要由Re(雷诺数),Ro( Rossby数),Pr(普朗特数)数,和α(旋转轴与管道轴线的夹角)四个参数决定。文中分析了在不同α情况下流场结构与摩擦系数比以及温度场与管道Nu数比率随Re数和Ro数的变化规律,为工程实际应用提供了理论依据。
旋转管道,, 二次流动,, 对流换热
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章本照, 陈华军, 张金锁
,-0001,():
-1年11月30日
环形截面弯管围绕其中心轴旋转时,同时受到科氏力和离心力作用,弯管内的对流换热更为复杂。本文对旋转环形截面弯管内的流动特性和温度分布进行了数值分析。结果表明:旋转环形截面弯管内的换热特性主要由Dn数,F数(科氏力和离心力之比),Pr数,和δ值(内外径之比)决定;文中给出并分析了在不同δ下流场结构与摩擦系数比随F数的变化特性和随Dn数的变化规律,并给出了在不同δ和Pr数情况下,温度场和管道Nu数随F数和Dn数的变化规律。
旋转弯曲管道,, 二次流动,, 对流换热
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章本照, 张金锁
力学学报,2001,2(33):183~194,-0001,():
-1年11月30日
从曲线柱坐标系下的N-S方程出发,以曲率和挠率为小参数,采用摄动法求解了环形截面螺旋管道内的黏性流动,给出了完全二阶摄动解。结果表明:当挠率为零时,二次流表现为上下对称的四个涡;当挠率不为零,涡的对称性遭到破坏,二次涡的强度和个数受De数和环形截面内外径之比δ的影响;轴向速度最大值在De数较小时靠近管道的内侧,随着De数的增加,其最大值向外侧移动。
螺旋管道,, 二次流,, 摄动法
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60浏览
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【期刊论文】Theoretical and numerical analysis of convective heat transfer in the rotating helical pipes
章本照, Huajun Chen*, Benzhao Zhang, Jianfeng Ma
International Journal of Heat and Mass Transfer 46(2003)4899-4909,-0001,():
-1年11月30日
In terms of the tensor analysis technique, the relative N-S equations and the energy equation in a rotating helical coordinate system are presented in this paper. Convective heat transfer in the rotating helical pipes with circular crosssection is investigated employing theoretical and numerical method. A perturbation solution up to the secondary order is obtained for a small Dean number. Variations of the temperature distribution with the force ratio (the ratio of the Coriolis force to the centrifugal force), the curvature and the torsion are discussed in detail. Present studies also show the natures of the Nusselt number, as well as the effects of the force ratio, the curvature, and the torsion. This study explores many new characteristics of convective heat transfer in the rotating helical pipes and covers wide ranges of parameters.
Convective heat transfer, Helical pipes, Rotation, Perturbation method, Numerical simulation
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【期刊论文】Fluid flow and mixed convection heat transfer in a rotating curved pipe
章本照, Huajun Chen*, Benzhao Zhang
International Journal of Thermal Sciences 42(2003)1047-1059,-0001,():
-1年11月30日
When a temperature-induced variation of fluid density occurs in a rotating curved pipe, the Coriolis force, the centrifugal-type buoyancy force and the centrifugal force will contribute to the generation of the secondary flow. The interaction of these body forces complicates the characteristics of flow and heat transfer. A numerical study is performed to examine the combined effects of rotation (Coriolis force), curvature (centrifugal force) and heating/cooling (centrifugal-type buoyancy force), and solutions are obtained for a wide range of parameters. The combined effects of these comparable order ofmagnitude forces on the flow structure, temperature distribution, friction factor and Nusselt number are examined in detail. Present works show the natures of the flow and heat transfer in rotating curved pipes.
Curved pipe, Mixed convection, Secondary flow, Rotation
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【期刊论文】Dean Equations Extended to a Rotating Helical Pipe Flow
章本照, Jinsuo Zhang and Benzhao Zhang
,-0001,():
-1年11月30日
In this paper, the fully developed laminar flow in a rotating helical elliptical pipe is examined theoretically. This study focuses on the combined effects of the rotation, the curvature, the torsion, and the shape of cross section. The secondary flow and the fluid particle trajectory are discussed for different elliptical cross sections in the range of-22≤σ≤1, where s represents the ratio of the Coriolis force to the centrifugal force.
Pipe flow, Secondary flow, Coriolis, Curvature, Perturbation.,
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【期刊论文】A S TUD Y ON THE UNS TEAD Y FLOW IN A HEL ICAL PI PE*
章本照, ZHANG Ben-zhao, , MA Zhai-pu, SU Xiao-yan, ZHANG Jin-suo
Applied Mathematics and Mechanics (English Edition, Vol. 24, No.5, May 2003),-0001,():
-1年11月30日
A study on the unsteady low-frequency oscillatory flow in a helical circular pipe is carried out based upon the blood flow in vessels, using the method of bi-parameter perturbation. The second order perturbation results were obtained and the characteristics were analyzed at different time of the axial velocity, of the secondary flow, and of the wall shearing stress. Also done the analysis of above-mentioned variables that varied along with time and Womersley number. The results indicate that for a helical pipe, the torsion exerts the main influence on the distribution of secondary flow velocity, especially when the absolute value of axial press gradient is rather small. The severe variation of streamfunction takes place within a very short period, during which time the streamfunction develops from positive value to negative value and vice versa, while in most cases in a cycle, the variation is smooth. The wall shearing stress changes severely with theta too.
oscillatory flow, perturbation method, helical pipe
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