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场协同理论及其在脉动流传热技术中的应用前景 被引量:8
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作者 杨志超 杨臧健 钟英杰 《机电工程》 CAS 2013年第4期435-438,443,共5页
针对目前脉动流强化传热研究中的问题,提出了将场协同理论应用于其机理研究。分析了现有脉动流强化传热问题的研究理论,指出了现有理论的局限性。介绍了场协同理论,阐述了其在研究脉动流强化传热问题中的优势。结合已有研究结果,分析了... 针对目前脉动流强化传热研究中的问题,提出了将场协同理论应用于其机理研究。分析了现有脉动流强化传热问题的研究理论,指出了现有理论的局限性。介绍了场协同理论,阐述了其在研究脉动流强化传热问题中的优势。结合已有研究结果,分析了场协同的观点应用于脉动流强化传热研究的可行性和应用前景。研究结果表明,场协同理论是独立于具体技术之外的基本理论,将其应用于脉动流强化传热机理研究是必要的和可行的,得到的结论具有较好的普遍性,对于脉动流强化传热技术的工程应用与理论研究具有指导意义。 展开更多
关键词 脉动流传热 场协同理论 强化换
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PIV技术在脉动流传热实验中的应用 被引量:4
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作者 张建华 李思文 +2 位作者 沈忠良 杨臧健 钟英杰 《浙江工业大学学报》 CAS 2014年第1期109-113,共5页
为了将PIV技术应用于脉动流传热研究,结合Dantec公司的PIV测量系统,搭建了脉动流传热实验台,探讨了在脉动流传热实验测量过程中,示踪粒子的选择和系统标定等问题,提出了脉动流场PIV测量示踪粒子选取及密闭流道标定的方法,利用Dynamic St... 为了将PIV技术应用于脉动流传热研究,结合Dantec公司的PIV测量系统,搭建了脉动流传热实验台,探讨了在脉动流传热实验测量过程中,示踪粒子的选择和系统标定等问题,提出了脉动流场PIV测量示踪粒子选取及密闭流道标定的方法,利用Dynamic Studio软件中的自适应互相关算法得到了清晰的涡量图和流线图,验证了方法的正确性及PIV技术应用于脉动流传热实验的可行性. 展开更多
关键词 PIV 脉动流传热 示踪粒子 标定
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Effects of Pulsation on Separated Flow and Heat Transfer in Enlarged Channel 被引量:1
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作者 Hiroyuki YOSHIKAWA Tomonori KAI +1 位作者 Mizue MUNEKATA Hideki OHBA 《Journal of Thermal Science》 SCIE EI CAS CSCD 2011年第1期70-75,共6页
Numerical results of three-dimensional separated flow and heat transfer in an enlarged rectangular channel are presented in this paper.The expansion ratio and aspect ratio of the channel are 2.0 and 16.0,respectively.... Numerical results of three-dimensional separated flow and heat transfer in an enlarged rectangular channel are presented in this paper.The expansion ratio and aspect ratio of the channel are 2.0 and 16.0,respectively.Reynolds number of the flow is 200 and it is over the critical Reynolds number.Over the critical Reynolds number,the flow in the symmetric channel becomes asymmetric and deflects to one side of the walls.Effects of the pulsating fluctuation at the inlet upon the flow in the channel are investigated.It is clarified that the inlet flow with a pulsating fluctuation of Strouhal number 0.05 and 0.10 strongly affects on the flow in the channel,and heat transfer on the walls is enhanced,especially on the wall surface covered with long separation bubble.On the other hand,the pulsation of St=0.0125 oscillates the shear layer more weakly than that of St=0.05,0.10 and the enhancement of heat transfer is smaller,though some vortices are shed from the vicinity of the side wall near the reattachment region.The oscillation of the main flow calms down gradually as the Strouhal number of the pulsation increases over 0.10.The influence of pulsation of St=0.20 on the flow is restricted in the near downstream of the step,and heat transfer on the walls is almost similar to that of the steady flow in the channel. 展开更多
关键词 Pulsating Fluctuation Symmetric Enlarged Channel Separated Flow Heat Transfer
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HEAT AND MASS TRANSFER EFFECTS ON CARREAU FLUID MODEL FOR BLOOD FLOW THROUGH A TAPERED ARTERY WITH A STENOSIS 被引量:9
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作者 NOREEN SHER AKBAR DBSEH CEME 《International Journal of Biomathematics》 2014年第1期69-89,共21页
In the current critique, we deliberate the blood flow through narrowing vein with a steno- sis in the manifestation of heat and mass transmission. The non-Newtonian flora of blood in small veins are examined mathemati... In the current critique, we deliberate the blood flow through narrowing vein with a steno- sis in the manifestation of heat and mass transmission. The non-Newtonian flora of blood in small veins are examined mathematically by demonstrating the blood as Carreau fluid. The illustration for the blood flow is debated through an axially irregular but outward regular stenosis. Regularity in the dissemination of the fortification clipping stress and resistive impedance and their evolution with the emerging stenosis is a new significant feature of our investigation. Analytical solutions have been appraised for "velocity, tem- perature, concentration, resistance impedance, wall shear stress and shearing stress at the stenosis throat". The graphical consequences of different types of tapering arteries (i.e. "converging tapering, diverging tapering, non-tapered artery") have been studied for dissimilar constraints of attention. Rivulet shapes have been strategized for different parameters at the culmination of the article. 展开更多
关键词 Carreau fluid blood flow tapered artery STENOSIS analytical solution heat and mass transfer.
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