Heat Transfer Experiments and Flow Visualization for Arrays of Short Pin Fins PDF Download
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Author: D. E. Metzger
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: D. E. Metzger
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Seung-Bae Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 406
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Author: Guang-Jyh Hwang
Publisher: CRC Press
ISBN: 9780891168881
Category : Science
Languages : en
Pages : 822
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Book Description
A collection of research papers into transport phenomena in thermal control, closely related to several important aspects of cooling technology. Articles provide overviews of current advances and details of individual technologies including electronic and turbine cooling and Marangoni convection.
Author: Allan D. Kraus
Publisher: John Wiley & Sons
ISBN: 0471436631
Category : Science
Languages : en
Pages : 1120
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Book Description
Drei anerkannte Experten dieses schnellebigen, modernen Fachgebiets erläutern hier Theorie, Design und Anwendungen eines breiten Spektrums von Oberflächen, die speziell für den effizienten Wärmetransport ausgelegt sind. Behandelt werden u. a. kompakte Wärmetauscher, periodische Wärmeströme und Siedevorgänge an Kühlrippen. Umfassend und informativ!
Author: Je-Chin Han
Publisher: CRC Press
ISBN: 1439855684
Category : Science
Languages : en
Pages : 892
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Book Description
A comprehensive reference for engineers and researchers, Gas Turbine Heat Transfer and Cooling Technology, Second Edition has been completely revised and updated to reflect advances in the field made during the past ten years. The second edition retains the format that made the first edition so popular and adds new information mainly based on selected published papers in the open literature. See What’s New in the Second Edition: State-of-the-art cooling technologies such as advanced turbine blade film cooling and internal cooling Modern experimental methods for gas turbine heat transfer and cooling research Advanced computational models for gas turbine heat transfer and cooling performance predictions Suggestions for future research in this critical technology The book discusses the need for turbine cooling, gas turbine heat-transfer problems, and cooling methodology and covers turbine rotor and stator heat-transfer issues, including endwall and blade tip regions under engine conditions, as well as under simulated engine conditions. It then examines turbine rotor and stator blade film cooling and discusses the unsteady high free-stream turbulence effect on simulated cascade airfoils. From here, the book explores impingement cooling, rib-turbulent cooling, pin-fin cooling, and compound and new cooling techniques. It also highlights the effect of rotation on rotor coolant passage heat transfer. Coverage of experimental methods includes heat-transfer and mass-transfer techniques, liquid crystal thermography, optical techniques, as well as flow and thermal measurement techniques. The book concludes with discussions of governing equations and turbulence models and their applications for predicting turbine blade heat transfer and film cooling, and turbine blade internal cooling.
Author: J. H. Kim
Publisher: CRC Press
ISBN: 9781560320135
Category : Science
Languages : en
Pages : 572
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Book Description
Completing the authoritative coverage begun in Dynamics of Rotating Machinery, this text offers 36 current chapters focusing on the areas of fluid flow, heat transfer, multiple flow, cavitation and design.
Author: Ata Komral
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
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Book Description
In this study, the offset strip fin array in a liquid flow liquid flow through module was examined. The study used a model of the heat exchanger which is ten times larger than the actual model used in electronics cooling. Water and Brayco Micronic 889 Polyalphasolefin were used as the working fluids in order to determine the Reynolds number and Prandtl number effects on the Colburn j factor. Also, flow visualization were experiments were performed to determine the flow characteristics of the offset strip fins for laminar flow.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 38
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Book Description
Author: J. H. Kim
Publisher: CRC Press
ISBN: 9781560321569
Category : Technology & Engineering
Languages : en
Pages : 766
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Book Description
This work the first of two contains papers presented at an international conference on the technology of rotating machinery, which specifically address transport phenomena in terms of turbine cooling heat transfer, rotating surfaces, curved ducts and rotating channels, multiphase flow and more.
Author: Melissa Shallcross
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
In gas turbine engines, the turbine comes just after the combustor, where fuel is mixed with air and ignited to produce a rapid expansion of hot gases. These turbine blades are thus exposed to an air temperature higher than the melting temperature of the turbine blade material, which threatens to destroy the airfoils. In order to combat this, jet engine manufacturers use several different cooling methods. One of these methods involves bleeding cooler bypass air routed from the upstream compressor through the turbine airfoils where arrays of short cylinders inside the trailing edge promote turbulence, therefore increasing the heat transfer from the blade to the cooling air. The heat transfer of these short pin fins is affected by the close proximity of the endwalls, making them unique compared to long cylinders in crossflow. The current study investigates the instantaneous and time-averaged heat transfer within short aspect ratio pin fin arrays of two streamwise spacings. Understanding the heat transfer characteristics of pin fin arrays will allow engineers to design more efficient arrays to incorporate into gas turbine engines. Using a heat flux microsensor embedded in an isothermal heated cylinder, the heat transfer around the circumference of a test pin is measured at ten-degree intervals. The instantaneous and time-averaged data is then compared for cylinders in multiple locations in the array at Reynolds numbers of 3000, 10000, 20000, and 50000. This data is taken at two streamwise spacings of 1.73 diameters between subsequent rows and 3.46 diameters between subsequent rows in order to compare the pin fin heat transfer at different array densities. The effect of natural convection on these tests was also studied. An experiment was performed in an attempt to find a correlation that could correct the heat transfer data so that only forced convection was reported.
