Heat transfer augmentation in gas-cooled channels

by Jurgis Vilemas

Publisher: CRC Press in Boca Raton

Written in English
Cover of: Heat transfer augmentation in gas-cooled channels | Jurgis Vilemas
Published: Pages: 253 Downloads: 430
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Subjects:

  • Heat exchangers.,
  • Heat -- Transmission.
  • Edition Notes

    Includes bibliographical references (p. 195-200) and index.

    StatementJ. Vilemas, V. Simonis, J.E. Adomaitis.
    ContributionsSimonis, V., Adomaitis, J. E.
    Classifications
    LC ClassificationsTJ263 .V5 1994
    The Physical Object
    Paginationix, 253 p. :
    Number of Pages253
    ID Numbers
    Open LibraryOL1414620M
    ISBN 100849399157
    LC Control Number93024021

of relating heat flux to temperature is needed to ‘close’ the problem. Fourier’s Law and the thermal conductivity Before getting into further details, a review of some of the physics of heat transfer is in order. As you recall from undergraduate heat transfer, there are three basic modes of transferring heat.   The purpose of this paper is to collect accessible research data based on the flow characteristics and the heat transfer rates across corrugated channels in particular. The previously obtained conception conditions, functional limits, and assumptions of energy systems are . [ Topic-wise Listing | Profile at GoogleScholar and ResearcherID. ] Text Book Narasimhan, A., (), "Essentials of Heat and Fluid Flow in Porous Media," Ane Books (Indian Edition) and CRC Press, Taylor and Francis Group, NY. [Book Details] Invited Book Chapters Narasimhan, A., (), "Convection in Bi-Disperse Porus Media," Ch. 8, in Convective Heat Transfer.   Mohebbi, H. Lakzayi, N. A. C. Sidik et al., “ Lattice Boltzmann method based study of the heat transfer augmentation associated with Cu/water nanofluid in a channel with surface mounted blocks,” Int. J. Heat Mass Transfer , – ().

Get this from a library! Numerical comparison of convective heat transfer augmentation devices used in cooling channels of hypersonic vehicles. [Jaime J Maldonado; United States. National Aeronautics and Space Administration.]. Liquid crystal technique was used for heat transfer measurements. It was found that at high rotational speeds, heat transfer increased in the inlet channel, while it decreased in the outlet channel. Additional testing at even higher speeds may provide insight into replacing a traditional U-bend channel in a . Heat Transfer Enhancement in a Plate Heat Exchanger with Rib-Roughened Surfaces / R. Tauscher and F. Mayinger ; Heat Transfer Augmentation in Channels with Porous Copper Inserts / Tuncer M. Kuzay and Jeffrey T. Collins ; Boiling on Structured Surfaces / Ralph L. Webb and Liang-Han Chien ; Heat Exchangers for Thermoacoustic Refrigerators: Heat. Heat transfer and pressure characteristics in a rectangular channel with pin-fin arrays of partial detachment from one of the endwalls have been experimentally studied. The overall channel geometry (W= mm, E= mm) simulates an internal cooling passage of wide aspect ratio () in .

Numerous studies on turbulent flow and heat transfer in the cooling channels of a gas turbine blade have been performed in the past. Han and Park @2# published experimental investigations of the heat transfer phenomenon in a stationary rib roughened rectangular channel. Heat transfer enhancement in a channel via a single stationary and oscillating cylinder was considered previously. Here, heat transfer augmentation by using two oscillating cylinders is investigated systematically and the results compared with the results for a single cylinder. Fully developed fluid flow with a parabolic velocity profile enters. Toutes les informations de la Bibliothèque Nationale de France sur: Transfert de chaleur.   Yuki, K, Uemura, M, Suzuki, K, & Sunamoto, K. "Boiling/Evaporation Heat Transfer Augmentation Using Subchannels-Inserted Metal Porous Media." Proceedings of the ASME Heat Transfer Summer Conference collocated with the ASME 7th International Conference on Energy Sustainability and the ASME 11th International Conference on Fuel Cell Science, Engineering .

Heat transfer augmentation in gas-cooled channels by Jurgis Vilemas Download PDF EPUB FB2

Examines the relationships governing high-rate, enhanced turbulent heat transfer in gas-cooled channels. The book presents results of detailed measurements of fluid-dynamic and thermal parameters on smooth and rough heat-emitting cylinders in axial flow, and heat-transfer and hydraulic-drag coefficients in rough annular and helical channels and.

Heat Transfer Augmentation in a Semiconductor Device [G. Bhatt] on *FREE* shipping on qualifying offers. With circuit densities continuing to increase at the rate of 30% per year, the problem associated with the thermal control of electronic devices will continue to multiply.

Thermal control of electronic components has one principal objective to maintain relatively constant Author: G. Bhatt. Exploring the potential of nanofluids for heat transfer augmentation in dimpled compact channels: Non-intrusive measurements International Journal of Heat and Mass Transfer, Vol.

Performance evaluation of compact channels with surface modifications for heat transfer enhancement: An interferometric study in developing flow regimeCited by: This book is concerned with relationships governing high-rate, enhanced turbulent heat transfer in gas-cooled channels.

[Read or Download] Heat Transfer Augmentation in Gas-Cooled Channels Full Books [ePub/PDF/Audible/Kindle] The book presents results of detailed measurements of fluid-dynamic and thermal parameters on smooth and rough heat-emitting cylinders in axial flow, and heat-transfer.

Sort Books by: Title Author Heat Transfer and Hydrodynamics in Gas-Cooled Fuel Rod Assemblies Benediktas B. Cesna. Heat Transfer Augmentation in Gas-Cooled Channels Jurgis Vilemas, Vytautas Simonis, J. Adomaitis. Heat Transfer in Dispersions Yu. Buyevich, Dmitri V.

Alexandrov. Liu and C. Gau, Onset of secondary flow and enhancement of heat transfer in horizontal convergent and divergent ducts heated from below, Int. Heat Mass Transfer 47 () – Crossref, ISI. Abnormal enhancement of heat transfer and separated turbulent air flow in oval-trench dimples of depth inclined at an angle of 45 о to the incoming flow and located in-line at the heated wall.

Heat transfer augmentation in the wavy channel can be achieved by interruption of thermal boundary layer growth due to generation of vortices. The present study deals with the Heat transfer augmentation in gas-cooled channels book of open-source computational fluid dynamics solver OpenFOAM to simulate fully developed flow and heat transfer in wavy channels with constant wall.

A description of the design, construction and applications of unfired heat exchangers used in the process industries, giving guidance on the merits and limitations of the different types, details of their materials of construction and cost and numerous examples of design calculations.

These are lecture notes for AME Intermediate Heat Transfer, a second course on heat transfer for undergraduate seniors and beginning graduate students.

At this stage the student can begin to apply knowledge of mathematics and computational methods to the problems of heat transfer. Thus. pages ISBN Fundamentals of Heat and Mass Transfer Enhanced This book is concerned with relationships governing high-rate, enhanced turbulent heat transfer in gas-cooled channels.

The book presents results of detailed measurements of Heat transfer augmentation in gas-cooled channels Jurgis Vilemas, Vytautas imonis, Jonas. Heat transfer enhancement in single-phase and two-phase flow heat exchangers in important in such industrial applications as power generating plant, process and chemical industry, heating, ventilation, air conditioning and refrigeration systems, and the cooling of electronic equipment.

Energy. Abstract. Heat transfer augmentation techniques (passive, active or a combination of passive and active methods) are commonly used in areas such as process industries, heating and cooling in evaporators, thermal power plants, air-conditioning equipment, refrigerators, radiators for space vehicles, automobiles, etc.

Passive techniques, where inserts are used in the flow passage to augment the. T.M. Kuzay, J.T. Collins and J. Koons, “Boiling Heat Transfer in Channels with Porous Copper Inserts,” accepted for publication in Int. Heat & Mass Trans. Google Scholar Van P. Carey, () Liquid-vapor Phase-change Phenomena, Hemisphere Publishing, pp– The local heat transfer and pressure drop of developed turbulent flows in the stationary ribbed rectangular convergent/divergent channels have been investigated experimentally.

The rectangular convergent/divergent channels with one-sided ribbed surface only have the inclination angles of deg and deg at which the ribbed wall is manufactured with a fixed rib height (e)=10 mm and the. A comparative experimental and numerical study has been conducted on the flow and heat transfer characteristics in a latticework cooling channel with U-shaped subchannels combined with dimple vortex generators over the Reynolds number range of –36, Heat transfer enhancement in single-phase and two-phase flow heat exchangers in important in such industrial applications as power generating plant, process and chemical industry, heating, ventilation, air conditioning and refrigeration systems, and the cooling of electronic equipment.

Energy savings are of primary importance in the design of such systems, leading to more efficient. The effect of slit ribs on heat transfer and friction in a rectangular channel is investigated experimentally.

The slit ribs are arranged in-line on two opposite walls of the channel. Three rib open-area ratios (β=24%, 37%, and 46%), three rib pitch-to-height ratios (Pi/H =10, 20, and 30), and two rib height-to-channel hydraulic diameter. Effect of Body Forces on Turbulent Heat Transfer Channels Book Efficient Surfaces for Heat Exchangers.

Extreme Methods for Solving Ill-Posed Problems with Applications to Inverse Heat Transfer Problems Book Flexible Automation and Integrated Manufacturing Heat Transfer Augmentation in Gas-Cooled Channels Book Heat Transfer Practice. Measurements are presented of the distribution of average friction factors (f) as well as local and average (Nu) heat transfer coefficients for fully developed channel flows with two rib-roughened opposite temperature measurements were made by using both a.

The heat transfer of separated flows at subsonic speeds is important for the design of heat transfer equipment. In flow separation, turbulence augments heat transfer in general but in particular region due to flow reattachment heat transfers and hot spot develops. Investigators are attracted to the point of reattachment.

An experimental study of heat transfer and pressure drop in a rectangular channel roughened by scaled surfaces on two opposite walls with flows directed in the forward and downward directions for Reynolds numbers (Re) in the range of ⩽ Re ⩽ 15, was t number ratios between the scale-roughened and smooth-walled ducted flows (Nu/Nu ∞) were in the.

Book Search tips Selecting this option will search all publications across the Scitation platform Selecting this option will search all publications for the Publisher Harnessing flow-induced vibration of a D-section cylinder for convective heat transfer augmentation in laminar channel flow.

A printed circuit heat exchanger (PCHE) is considered for use as an intermediate heat exchanger (IHX) in high temperature gas-cooled Reactors (HTGRs), since PCHEs offer high effectiveness and a compact size.

A PCHE consists of many micro-wavy channels, which increase heat transfer and pressure drop. Vilemas's 34 research works with 45 citations and reads, including: National Energy Strategy. Heat Transfer Enhancement in a Plate Heat Exchanger with Rib-Roughened Surfaces-- R. Tauscher, F. Mayinger.

Heat Transfer Augmentation in Channels with Porous Copper Inserts-- T.M. Kuzay, J.T. Collins. Boiling on Structured Surfaces-- R.L. Webb, L.-H. Chien. Heat transfer, a mere process of exchange of heat due to a temperature gradient, plays a vital role in industries and domestic applications.

Among all the heat exchangers, Shell and Tube Exchanger are used predominantly due to their compact and robust design. (q) Channel with a triangular rib [17] Figure 1. Various flow configurations with different types of vortex generators (VGs) Zhai et al.

[9] conducted a heat transfer experiment to calculate the Nusselt number, friction factor and thermal performance through a circular-tube with delta winglet VGs of.

Heat transfer enhancement refers to application of basic concepts of heat transfer processes to improve the rate of heat removal or deposition on a surface.

In the flow of a clean fluid through the tube of a heat exchanger, the boundary layer theorem establishes that a laminar sublayer exists where the fluid velocity is minimal. Heat transfer through this stagnant layer is mainly. The heat transfer augmentation ratio on the trailing surface asymptotes to a value of ± 5% and does not show any further increasing trend as the rotation number increases beyond On the other hand, augmentation ratios on the leading surface keep decreasing with an increase in rotation number with values ranging from at Ro = to.

heat exchanger. The passive heat transfer augmentation methods as stated earlier do not need any external power in put. For the convective heat transfer, one of the ways to enhance heat transfer rate is to increase the effective surface area and residence time of the heat transfer fluids.

The [email protected]{osti_, title = {Forced convection heat transfer augmentation in a channel with a localized heat source using fibrous materials}, author = {Angirasa, D and Peterson, G P}, abstractNote = {A numerical model is developed for high Reynolds number forced convection heat transfer in a channel filled with randomly oriented, thin fibrous materials of high porosity.().

Experimental Study on Heat Transfer Augmentation for High Heat Flux Removal in Rib-Roughened Narrow Channels. Journal of Nuclear Science and Technology: Vol.

35, No. 9, pp.