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Author : Yuming Zhang
Publisher :
ISBN 13 :
Total Pages : 144 pages
Book Rating : 4.:/5 (367 download)
Download or read book Jet Impingement Heat Transfer in Two-pass Rotating Rectangular Channels written by Yuming Zhang and published by . This book was released on 1996 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. A. Parsons
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)
Download or read book Rotation Effect on Jet Impingement Heat Transfer in Smooth Rectangular Channels with Four Heated Walls and Radially Outward Cross Flow written by J. A. Parsons and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented at the International Gas Turbine and Aeroengine Congress & Exhibition, Birmingham, UK, Jun 10-13, 1996.
Author : Wen-Lung Fu
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (617 download)
Download or read book Aspect Ratio Effect on Heat Transfer in Rotating Two-pass Rectangular Channels with Smooth Walls and Ribbed Walls written by Wen-Lung Fu and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study experimentally investigates the effects of rotation, the buoyancy force, and the channel aspect ratio on heat transfer in two-pass rotating rectangular channels. The experiments are conducted with two surface conditions: smooth walls and 45° angled ribbed walls. The channel aspect ratios include 4:1, 2:1, 1:1, 1:2 and 1:4. Four Reynolds numbers are studied: 5000, 10000, 25000 and 40000. The rotation speed is fixed at 550 rpm for all tests, and for each channel, two channel orientations are studied: 90° and 45° or 135°, with respect to the plane of rotation. Rib turbulators are placed on the leading and trailing walls of the channels at an angle of 45° to the flow direction. The ribs have a 1.59 by 1.59 mm square cross section, and the rib pitch-to-height ratio (P/e)is 10 for all tests. The effects of the local buoyancy parameter and channel aspect ratio on the regional Nusselt number ratio are presented. Pressure drop data are also measured for both smooth and ribbed channels in rotating and non-rotating conditions. The results show that increasing the local buoyancy parameter increases the Nusselt number ratio on the trailing surface and decreases the Nusselt number ratio on the leading surface in the first pass for all channels. However, the trend of the Nusselt number ratio in the second pass is more complicated due to the strong effect of the 180° turn. Results are also presented for this critical turn region of the two-pass channels. In addition to these regions, the channel averaged heat transfer, friction factor, and thermal performance are determined for each channel. With the channels having comparable Nusselt number ratios, the 1:4 channel has the superior thermal performance because it incurs the least pressure penalty. In this study, the author is able to systematically analyze, correlate, and conclude the thermal performance comparison with the combination of rotation effectson five different aspect ratio channels with both smooth walls and rib turbulated walls.
Author : Je-Chin Han
Publisher : Taylor & Francis
ISBN 13 : 1466564903
Total Pages : 865 pages
Book Rating : 4.4/5 (665 download)
Download or read book Gas Turbine Heat Transfer and Cooling Technology written by Je-Chin Han and published by Taylor & Francis. This book was released on 2012-11-27 with total page 865 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive reference for engineers and researchers, this second edition focuses on gas turbine heat transfer issues and their associated cooling technologies for aircraft and land-based gas turbines. It provides information on state-of-the-art cooling technologies such as advanced turbine blade film cooling and internal cooling schemes. The book also offers updated experimental methods for gas turbine heat transfer and cooling research, as well as advanced computational models for gas turbine heat transfer and cooling performance predictions. The authors provide suggestions for future research within this technology and includes 800 illustrations to help clarify concepts and instruction.
Author : Sujoy Kumar Saha
Publisher : Springer
ISBN 13 : 3030207404
Total Pages : 103 pages
Book Rating : 4.0/5 (32 download)
Download or read book Introduction to Enhanced Heat Transfer written by Sujoy Kumar Saha and published by Springer. This book was released on 2019-06-29 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Brief stands as a primer for heat transfer fundamentals in heat transfer enhancement devices, the definition of heat transfer area, passive and active enhancement techniques and their potential and benefits and commercial applications. It further examines techniques and modes of heat transfer like single-phase flow and two-phase flow, natural and forced convection, radiation heat transfer and convective mass transfer.
Author : Michael Huh
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (69 download)
Download or read book Heat Transfer in Smooth and Ribbed Rectangular Two-pass Channels with a Developing Flow Entrance at High Rotation Numbers written by Michael Huh and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cooling channels with a developing flow entrance condition and aspect ratios of 1:4 and 2:1 were studied. The range of the rotation number and buoyancy parameter for the selected AR channels was extended. The maximum Ro and Bo for the 1:4 channel was 0.67 and 1.9, respectively. For the 2:1 channel, these values were 0.45 and 0.85, respectively. The effect of rib spacing and rib height on heat transfer in the 1:4 channel is investigated. Three rib spacing configurations were considered: P/e=2.5, 5, 10 with a constant e/Dh ratio of 0.078. To investigate the effect of rib height, a rib configuration with an e/Dh ratio of 0.156 and P/e ratio of 10 was considered. For the 2:1 channel, a smooth channel surface condition was studied. For each channel aspect ratio and surface condition, five Reynolds numbers were studied up to 40K. At each Re, five rotational speeds are considered up to 400 rpm. The results of this research work indicate that rotation can cause a significant increase in heat transfer on the first pass trailing surface of both aspect ratio channels. The leading surface in ribbed channels has shown a dramatic decrease in heat transfer with rotation in the first pass. Reductions in heat transfer by as much as 50% were observed. In the second pass, the leading and trailing surfaces with ribs showed very similar effects of rotation. Also, the effect of rotation seems to vary with the rib spacing. The strength of rotation showed to be greater in the tight rib spacing of P/e=2.5. The rib height in the 1:4 channel had minimal impact due to the large distance between the leading and trailing surfaces. The tip cap heat transfer for both channels showed large increases with rotation. This is very beneficial since tip cooling is an important part of maintaining the life a turbine blade. Finally, the buoyancy parameter proved to be very useful in predicting heat transfer in rotating conditions. The correlations developed showed very acceptable accuracy when compared to the experimental data.
Author :
Publisher :
ISBN 13 :
Total Pages : 996 pages
Book Rating : 4.F/5 ( download)
Download or read book Journal of Thermophysics and Heat Transfer written by and published by . This book was released on 2006 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt: This journal is devoted to the advancement of the science and technology of thermophysics and heat transfer through the dissemination of original research papers disclosing new technical knowledge and exploratory developments and applications based on new knowledge. It publishes papers that deal with the properties and mechanisms involved in thermal energy transfer and storage in gases, liquids, and solids or combinations thereof. These studies include conductive, convective, and radiative modes alone or in combination and the effects of the environment.
Author : Pratik Santosh Bhansali
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)
Download or read book Jet Impingement Heat Transfer Over Rotating Surfaces written by Pratik Santosh Bhansali and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bengt Sundén
Publisher : WIT Press
ISBN 13 : 1845646568
Total Pages : 365 pages
Book Rating : 4.8/5 (456 download)
Download or read book Introduction to Heat Transfer written by Bengt Sundén and published by WIT Press. This book was released on 2012 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting the basic mechanisms for transfer of heat, this book gives a deeper and more comprehensive view than existing titles on the subject. Derivation and presentation of analytical and empirical methods are provided for calculation of heat transfer rates and temperature fields as well as pressure drop. The book covers thermal conduction, forced and natural laminar and turbulent convective heat transfer, thermal radiation including participating media, condensation, evaporation and heat exchangers. This book is aimed to be used in both undergraduate and graduate courses in heat transfer and thermal engineering. It can successfully be used in R & D work and thermal engineering design in industry and by consultancy firms
Author : Srivatsan Madhavan
Publisher :
ISBN 13 :
Total Pages : 129 pages
Book Rating : 4.:/5 (128 download)
Download or read book Jet Impingement Heat Transfer in Various Cooling Configurations Under Stationary and Rotating Conditions written by Srivatsan Madhavan and published by . This book was released on 2021 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.F/5 ( download)
Download or read book Multiple Jet Impingement Heat Transfer Characteristic written by and published by . This book was released on 1980 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Richard J. Goldstein
Publisher :
ISBN 13 : 9781573313285
Total Pages : 0 pages
Book Rating : 4.3/5 (132 download)
Download or read book Heat Transfer in Gas Turbine Systems written by Richard J. Goldstein and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores recent developments in heat transfer and thermal control applied to modern high-temperature gas turbine systems. It examines experimental results and techniques computational studies and methods and design recommendations. Aspects of heat transfer in rotating machinery are studied as well as thermal aspects of other sections of the turbine (e.g. the compressor). Proceedings of an August 2000 conference.
Author : Bengt Sundén
Publisher : Witpress
ISBN 13 :
Total Pages : 544 pages
Book Rating : 4.3/5 (91 download)
Download or read book Heat Transfer in Gas Turbines written by Bengt Sundén and published by Witpress. This book was released on 2001 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title presents and reflects current active research on various heat transfer topics and related phenomena in gas turbine systems. It begins with a general introduction to gas turbine heat transfer, before moving on to specific areas.
Author :
Publisher :
ISBN 13 :
Total Pages : 400 pages
Book Rating : 4.3/5 (243 download)
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 734 pages
Book Rating : 4.0/5 ( download)
Download or read book 32nd Thermophysics Conference written by and published by . This book was released on 1997 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher : Elsevier
ISBN 13 : 0443157898
Total Pages : 306 pages
Book Rating : 4.4/5 (431 download)
Download or read book Advances in Heat Transfer written by and published by Elsevier. This book was released on 2023-05-25 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Heat Transfer, Volume 55, the newest release in this series, highlights advances in the field with this new volume presenting interesting chapters written by an international board of authors. Topics discussed in this release include Mesoscopic Scale Simulations of Heat Transport in Porous Structures, Advancements in Single-Phase Enhanced Heat Transfer in Microchannels, and more. Provides the authority and expertise of leading contributors from an international board of authors Presents the latest release in the Advances in Heat Transfer series
Author : Belal Krad
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (881 download)
Download or read book Heat Transfer Enhancement in Rectangular Channel with Compound Cooling Techniques written by Belal Krad and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Various compound internal cooling techniques were investigated in this experiment to see which combinations can offer the greatest heat transfer. Combinations of rib turbulators as well as pin0fins were used in different configurations in order to analyze heat transfer and pressure loss characteristics to determine which configuration had the overall best performance. Two different flow configurations were considered, a uniform channel flow setup as well as a jet impingement setup. There were a total of sixteen cases performed for the experiment, eight for the channel flow and eight for the jet impingement. The types of cases that were performed were: a smooth surface case, two cases of only copper rib turbulators (P/e ratios of 5 and 10), two cases of only copper pin0fins (P/e ratios of 5 and 10), and three cases of a combinations of copper rib turbulators and pin0fins (P/e ratios of 2.5, 5, and 10). All of the cases were performed at four different Reynolds numbers to explore the effect of Reynolds number on the heat transfer. In terms of the channel flow experiment, the results indicate that the all ribs case with a P/e ratio of 5 had the highest heat transfer coefficients but also produced the highest friction factor. If the total area is considered and not just the projected area, than the case of all pins P/e ratio of 10 is the best candidate due to its extensively low pressure drop and moderate heat transfer. In terms of the jet impingement experiment, none of the cases significantly enhanced heat transfer and many of them had results lower than the smooth case. The case of all pins P/e ratio of 5 performed the best out of all the rough cases but the case of all pins P/e ratio of 10 perform the best when taking into account the total surface area. Cross0flow contributed to the jet impingement results, lowering the local Nusselt number due to the bending of the jet beams in the low x/d regions but started increasing the local Nusselt number at further x/d due to the cross flow heat transfer. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151917
