An Empirical Study Of A Pin Fin Heat Exchanger In Laminar And Turbulent Flow
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An Empirical Study Of A Pin Fin Heat Exchanger In Laminar And Turbulent Flow
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Author : Jeffrey W. Summers
language : en
Publisher:
Release Date : 2003-12
An Empirical Study Of A Pin Fin Heat Exchanger In Laminar And Turbulent Flow written by Jeffrey W. Summers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-12 with categories.
This study concentrates on the empirical characterization of a staggered array pin fin compact heat exchanger placed in a modular, rectangular wind tunnel. A full analysis of the heat transfer and pressure drop behavior was conducted on various pin-fin shapes, sizes, and configurations. The study was based on airflow over a range of low Reynolds numbers in the laminar and low turbulent flow, as well as higher turbulent flow regimes. The empirical data gathered can be used to corroborate and develop better numerical models to characterize the performance of such compact heat exchangers.
An Experimental Investigation Of The Performance Of Staggered Pin Fin Array Laminar Flow Heat Exchangers
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Author :
language : en
Publisher:
Release Date : 2005
An Experimental Investigation Of The Performance Of Staggered Pin Fin Array Laminar Flow Heat Exchangers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
This study concentrates on the empirical characterization of a staggered pin-fin array heat exchanger placed in a modular, rectangular wind tunnel. A full analysis of the heat transfer and pressure drop behavior was conducted on various pin-fin shapes, sizes, and configurations. The study was based on airflow over a wide range of Reynolds numbers in the laminar regime. The empirical data gathered can be used to corroborate and develop better numerical models to characterize the performance of such heat exchangers as well as scale down to the micro level for comparison with micro-heat exchangers.
An Experimental Study Of A Pin Fin Heat Exchanger
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Author : David Ramthun
language : en
Publisher:
Release Date : 2003-06-01
An Experimental Study Of A Pin Fin Heat Exchanger written by David Ramthun and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-06-01 with categories.
A detailed experimental study has been carried out on the heat transfer and pressure drop characteristics of a compact heat exchanger with pin fins, A modular wind- tunnel with a rectangular cross-section duct-flow area was constructed that would accommodate the heat exchanger test section with varying pin designs. The flow in the tunnel was achieved through a suction-type blower, and a leading entrance length section was added to achieve predictable flow conditions into the heat exchanger test section. The rig was comprehensively instrumented to provide all desired thermal and flow data. The results from this study provide useful empirical data to validate ongoing numerical studies of such heat exchanger designs.
Numerical Analysis Of The Performance Of Staggered Pin Fin Micro Heat Exchangers
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Author : Jui S. Choo
language : en
Publisher:
Release Date : 2003-12-01
Numerical Analysis Of The Performance Of Staggered Pin Fin Micro Heat Exchangers written by Jui S. Choo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-12-01 with categories.
The heat transfer and pressure drop characteristics of a staggered micro pin-fin heat exchanger were analyzed using a three dimensional finite element based numerical model. Simulations were conducted based on low Reynolds number, fully developed laminar airflow through an array of circular pin-fins. A range of results was obtained from different configurations with varying pin spacing, axial pitch and pin height. The results from this study would be useful in ongoing work on the design of a laminar flow micro heat exchanger for high heat flux dissipation systems.
Numerical Simulations Of Laminar Transitional And Turbulent Flow And Heat Transfer In Continuous And Interrupted Plate Channels
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Author : Kelechi Ezeji
language : en
Publisher:
Release Date : 2016
Numerical Simulations Of Laminar Transitional And Turbulent Flow And Heat Transfer In Continuous And Interrupted Plate Channels written by Kelechi Ezeji and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
"The long-term goal of this research is to contribute to the development of mathematical models and numerical solution methods for use as cost-effective tools in procedures for designing the next generation of compact and ultra-compact heat exchangers (core heat transfer area density exceeding 700 m^2/m^3 and 3000 m^2/m^3, respectively). Such heat exchangers are expected to play a major role in ongoing worldwide efforts to propose novel energy conversion systems. The desire to participate in such efforts is the main motivation for this work. Attention in this work was focused on rectangular offset strip-fin plate-fin core configurations. Over the last 50 years, there have been many efforts to increase the compactness of such cores. However, increasing compactness reduces the hydraulic diameter and (hence) the Reynolds number, for the same average velocity, which can lead to turbulent-to-laminar transition. These consequences of increasing compactness bring up the issue of its effect on the rate of heat transfer for a fixed pumping power. The rectangular offset strip-fin plate-fin configuration causes starting, interrupting, and restarting of both velocity and thermal boundary layers, and also possible unsteadiness and vortex shedding; and these thermofluid features bring up the issue of maximizing heat transfer for specified heat transfer surface area and fixed pumping power.The main goal of this research was to contribute to the resolution of the first of the aforementioned two issues, in a highly cost-effective manner. Thus, fins of negligible thickness and flow passages of large cross-sectional aspect ratio were assumed, and attention was limited to steady two-dimensional fluid flow and heat transfer phenomena. Air was the fluid of choice, and it was assumed that its thermophysical properties remained essentially constant. Furthermore, the Eckert number was much less than one in the problems considered here, so viscous dissipation could be ignored.Elliptic and parabolic mathematical models of developing fluid flow and heat transfer in continuous parallel-plate channels and arrays of regular staggered plates were considered. Three different low-Reynolds-number turbulence models (all capable of predicting turbulent-laminar transition with reduction in Reynolds number) were selected for comparative assessment. These mathematical models were solved using two-dimensional elliptic (2DE) and parabolic (2DP) finite volume methods (FVMs): the 2DE FVM was an adapted version of an in-house code; the 2DP FVM was specially formulated and implemented for this work, retaining the momentum equation in the direction transverse to the main flow (a novel feature of the proposed method). Mathematical models of fully developed fluid flow and heat transfer in pipes and parallel-plate channels were also considered and solved using one-dimensional FVMs. The results were compared to those yielded by available empirical correlations and also experimental data. Finally, one of the three low-Reynolds-number turbulence models and the 2DP FVM were used to simulate fluid flow and heat transfer in three actual rectangular offset strip-fin plate-fin cores of compact heat exchangers.For fully developed flows, all three low-Reynolds-number turbulence models considered in this work gave results that showed excellent agreement with those yielded by available empirical correlations and also experimental data. For developing fluid flow and heat transfer, the 2DP results compared very well with the 2DE results; however, the 2DP FVM executed 700 to 12,000 times faster than the 2DE FVM for comparable computational grids. In simulations of developing fluid flow and heat transfer in continuous-plate channels and regular arrays of staggered plates, only one of the three low-Reynolds-number turbulence models gave good results. The details of the models, numerical methods, and results, and also some recommendations, are presented and discussed in this thesis." --
Turbulent Flows And Heat Transfer
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Author : Chia-Ch'iao Lin
language : en
Publisher: Princeton University Press
Release Date : 2015-12-08
Turbulent Flows And Heat Transfer written by Chia-Ch'iao Lin and has been published by Princeton University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-12-08 with Science categories.
Volume V of the High Speed Aerodynamics and Jet Propulsion series. Topics include transition from laminar to turbulent flow; turbulent flow; statistical theories of turbulence; conduction of heat; convective heat transfer and friction in flow of liquids; convective heat transfer in gases; cooling by protective fluid films; physical basis of thermal radiation; and engineering calculations of radiant heat exchange. Originally published in 1959. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Heat Transfer With Laminar And Turbulent Flow Between Parallel Planes With Constant And Variable Wall Temperature And Heat Flux
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Author : Peter Allen McCuen
language : en
Publisher:
Release Date : 1962
Heat Transfer With Laminar And Turbulent Flow Between Parallel Planes With Constant And Variable Wall Temperature And Heat Flux written by Peter Allen McCuen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Heat categories.
Applied Mechanics Reviews
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Author :
language : en
Publisher:
Release Date : 1988
Applied Mechanics Reviews written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Mechanics, Applied categories.
Turbulent Heat Transfer And Flow Friction Characteristics Of Plain Plate Fin Heat Exchanger Surfaces
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Author : Stanford University. Department of Mechanical Engineering
language : en
Publisher:
Release Date : 1959
Turbulent Heat Transfer And Flow Friction Characteristics Of Plain Plate Fin Heat Exchanger Surfaces written by Stanford University. Department of Mechanical Engineering and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with categories.
Low Reynolds Number Flow Heat Exchangers
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Author : Sadık Kakaç
language : en
Publisher: Springer
Release Date : 1983
Low Reynolds Number Flow Heat Exchangers written by Sadık Kakaç and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Heat exchangers categories.