A Novel Infrared Thermography Heat Transfer Measurement Technique PDF Download
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Author: Henry M. Eppich
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Henry M. Eppich
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Tommaso Astarita
Publisher: Springer Science & Business Media
ISBN: 3642295088
Category : Technology & Engineering
Languages : en
Pages : 237
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Book Description
Infrared thermography is a measurement technique that enables to obtain non intrusive measurements of surface temperatures. One of the interesting features of this technique is its ability to measure a full two dimensional map of the surface temperature and for this reason it has been widely used as a flow visualization technique. Since the temperature measurements can be extremely accurate it is possible, by using a heat flux sensor, also to measure convective heat transfer coefficient distributions on a surface making the technique de facto quantitative. This book, starting from the basic theory of infrared thermography and heat flux sensor guides, both the experienced researcher and the young student, in the correct application of this powerful technique to various practical problems. A significant number of examples and applications are also examined in detail.
Author: Douglas M. Burch
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 60
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Book Description
Author: Vladimir Vavilov
Publisher: Springer Nature
ISBN: 303048002X
Category : Technology & Engineering
Languages : en
Pages : 610
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Book Description
This is the first book summarizing the theoretical basics of thermal nondestructive testing (TNDT) by combining elements of heat conduction, infrared thermography, and industrial nondestructive testing. The text contains the physical models of TNDT, heat transfer in defective and sound structures, and thermal properties of materials. Also included are the optimization of TNDT procedures, defect characterization, data processing in TNDT, active and passive TNDT systems, as well as elements of statistical data treatment and decision making. This text contains in-depth descriptions of applications in infrared/thermal testing within aerospace, power production, building, as well as the conservation of artistic monuments The book is intended for the industrial specialists who are involved in technical diagnostics and nondestructive testing. It may also be useful for academic researchers, undergraduate, graduate and PhD university students.
Author: Josua Meyer
Publisher: CRC Press
ISBN: 0429510292
Category : Science
Languages : en
Pages : 483
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Book Description
The Art of Measuring in the Thermal Sciences provides an original state-of-the-art guide to scholars who are conducting thermal experiments in both academia and industry. Applications include energy generation, transport, manufacturing, mining, processes, HVAC&R, etc. This book presents original insights into advanced measurement techniques and systems, explores the fundamentals, and focuses on the analysis and design of thermal systems. Discusses the advanced measurement techniques now used in thermal systems Links measurement techniques to concepts in thermal science and engineering Draws upon the original work of current researchers and experts in thermal-fluid measurement Includes coverage of new technologies, such as micro-level heat transfer measurements Covers the main types of instrumentation and software used in thermal-fluid measurements This book offers engineers, researchers, and graduate students an overview of the best practices for conducting sound measurements in the thermal sciences.
Author: Michael Vollmer
Publisher: John Wiley & Sons
ISBN: 3527641556
Category : Science
Languages : en
Pages : 662
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Book Description
This richly illustrated hands-on guide is designed for researchers, teachers and practitioners. The huge selection of examples taken from science, basic teaching of physics, practical applications in industry and a variety of other disciplines spanning the range from medicine to volcano research allows readers to pick those that come closest to their own individual task at hand. Following a look at the fundamentals of IR thermal imaging, properties of the imaging systems, as well as basic and advanced methods, the book goes on to discuss IR imaging applications in teaching, research and industry. Specific examples include thermography of buildings, microsystems and the rather new field of IR imaging of gases. Impartially written by expert authors in the field from a renowned applied science institution, who are in the unique position of having both experience in public and private research and in teaching, this comprehensive book can be used for teaching beginners in the field as well as providing further education to specialized staff, students and researchers.
Author: Liang Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 114
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Book Description
An experimental investigation has been performed to verify heat flux measurements on a metallic film-cooled flat plate by using infrared thermography in a transient facility. Infrared thermography provides high-resolution temperature distributions and makes it easy to locate hot spots on the object of interest. Previous work has shown that infrared thermography can produce accurate measurement for an uncooled flat plate. The goal of this thesis is to show that infrared thermography can also measure heat flux for film-cooled components and lay the foundation for its use in full-scale rotating experiments. A stainless steel plate with rows of cooling holes was built for testing in a blowdown facility. During the experiment, the plate was exposed to hot main flow and supplied with low temperature air through the cooling holes. The heat flux on the plate surface was determined by performing a 3D ANSYS transient thermal analysis using the infrared temperature distribution as time dependent top surface boundary conditions. The challenge of this technique for the film-cooled plate is that the boundary conditions are not known for the cooling channel walls and backside walls that exposed to cooling air since it is not practical to obtain measurements in those regions. Although strong jet impingement and forced convection are taking place on these walls, they are treated as adiabatic for the numerical analysis and the analysis time window is kept short so that through-wall conduction will not affect the top surface during the run. It is shown that the through-wall conduction from the backside and cooling channel walls only impact the regions right upstream the cooling holes and only after a relatively long run time. The fidelity of this technique is verified by comparing the results calculated based on the infrared images to the results obtained from traditional heat-flux gauges. The infrared thermography and the heat-flux gauges measurements agree within 10% for the regions that are not affected by backside and cooling channel walls boundary conditions. When the boundary conditions and through-wall conduction do impact the results, the adiabatic wall assumption causes the infrared thermography to predict a lower heat flux than the heat-flux gauges. After the method had been clearly demonstrated, it was used to make comparisons between cooled and uncooled cases to clearly identify how the film cooling spreads and mixes from the rows of cooling holes.
Author: Raghu Prakash
Publisher: BoD – Books on Demand
ISBN: 9535102427
Category : Mathematics
Languages : en
Pages : 250
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Book Description
Infrared Thermography (IRT) is commonly as a NDE tool to identify damages and provide remedial action. The fields of application are vast, such as, materials science, life sciences and applied engineering. This book offers a collection of ten chapters with three major sections - relating to application of infrared thermography to study problems in materials science, agriculture, veterinary and sports fields as well as in engineering applications. Both mathematical modeling and experimental aspects of IRT are evenly discussed in this book. It is our sincere hope that the book meets the requirements of researchers in the domain and inspires more researchers to study IRT.
Author: Je-Chin Han
Publisher: CRC Press
ISBN: 1000072169
Category : Science
Languages : en
Pages : 338
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Book Description
Experimental Methods in Heat Transfer and Fluid Mechanics focuses on how to analyze and solve the classic heat transfer and fluid mechanics measurement problems in one book. This work serves the need of graduate students and researchers looking for advanced measurement techniques for thermal, flow, and heat transfer engineering applications. The text focuses on analyzing and solving classic heat transfer and fluid mechanics measurement problems, emphasizing fundamental principles, measurement techniques, data presentation, and uncertainty analysis. Overall, the text builds a strong and practical background for solving complex engineering heat transfer and fluid flow problems. Features Provides students with an understandable introduction to thermal-fluid measurement Covers heat transfer and fluid mechanics measurements from basic to advanced methods Explains and compares various thermal-fluid experimental and measurement techniques Uses a step-by-step approach to explaining key measurement principles Gives measurement procedures that readers can easily follow and apply in the lab
Author: Hannah M. O. Lawson
Publisher:
ISBN:
Category :
Languages : en
Pages : 148
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Book Description
An experimental investigation was performed to assess the ability of infrared (IR) thermography methods to measure heat fluxes into a stainless steel flat plate in a medium-duration blowdown facility. Experimental work has shown that valuable insight can be gained from experiments performed with full-scale rotating rigs but IR thermography has generally been limited to experiments with plastic-like test articles and steady state or long-duration measurements. The goal of this experiment is to further develop IR thermography methods for eventual use in short-duration experiments investigating full-scale rotating turbines. This requires the ability to determine the heat flux on the surface of a metal blade exposed to hot flow for a very brief time. In order to develop the methodology that will be necessary for these rotating experiments, a set of stationary experiments was undertaken in a blowdown wind tunnel. The heat fluxes measured with IR thermography were compared side by side to heat fluxes measured by double-sided Kapton heat-flux gauges, which have been used extensively in full-scale rotating rigs. Two numerical models were used to post-process the IR-measured surface temperatures to calculate heat fluxes. The first was a one-dimensional finite volume method (FVM) model and both semi-infinite and symmetric boundary conditions were applied. The second was a two-dimensional finite element method (FEM) model in ANSYS with symmetric boundary conditions. The blowdown wind tunnel provides a challenging test case for these methods since the freestream total temperature changes significantly over the duration of the experiment.
