Download or read book Radiative Contribution to the Thermal Conductivity of Fibrous Insulations written by RMF Linford and published by . This book was released on 1974 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design studies on the reuseable surface insulation (RSI) systems for the Space Shuttle require accurate data on the thermal conductivity of ceramic-fiber insulations. Well-established laboratory techniques, such as the guarded hot plate experiment, are available for such measurements; however, caution must be exercised in applying laboratory data to widely different re-entry thermal environments. The heat-transfer associated with infrared radiation transmitted through the fibrous materials must be considered. Various analytical models have been developed to account for this radiant heat transfer, but their verification has often been incomplete. A new approach has now been applied in which infrared transmission measurements were made with an optical system that collected all the scattered radiation transmitted through the back surface of fibrous samples. Experimental data were analyzed using a "two-flux" model for the radiation scattered and absorbed in the materials and excellent correlation was obtained between theory and experiment. To account for the wavelength dependence of the scattering cross-sections of many materials, a "four-flux" model was developed. This model was used to compute the contribution of the radiation transmission to the total thermal conductivity of samples measured on the guarded hot plate equipment. The contribution was shown to be as high as 75 percent of the total conductivity at temperatures above 1000 K.
Download or read book Heat Transmission Measurements in Thermal Insulations written by R. P. Tye and published by ASTM International. This book was released on 1979-12 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Conductivity 30 written by Daniela S. Gaal and published by DEStech Publications, Inc. This book was released on 2010 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Transmission Measurements of Insulation written by Ronald Phillip Tye and published by ASTM International. This book was released on 1978 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of the Thermal Properties of High temperature Insulation Materials written by A. E. Wechsler and published by . This book was released on 1963 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This program encompasses an analytical and experimental investigation of the thermal properties of high temperature insulation materials. Effective thermal conductivities of graphite and zirconia fibers were measured in the temperature range of -320 to 200 F. The results were compared with empirical and theoretical models of heat transfer in fibrous insulations. Measurements of visible and infrared transmission through insulation materials indicated that scattering is the principal mechanism of radiation attenuation. Scattering and absorption cross sections estimated from the transmission data are given and show little effect of insulation temperature. The effective thermal conductivities of evacuated insulation systems were measured in the temperature range from 60 to 4000 F. The stability of materials exposed to high temperature vacuum environment for up to 170 hours was studied.
Download or read book Thermal Conductivity 18 written by T. Ashworth and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Thermal Conductivity Conference was started in 1961 with the initiative of Mr. Charles F. Lucks, who passed away on 8 July 1982 and to the memory of whom this volume is dedicated. These Conferences on thermal conductivity grew out of the needs of researchers in the field. The Conferences were held annu ally from 1961 to 1973 and have been held biennially since 1975 when our Center for Information and Numerical Data Analysis and Synthesis (CINDAS) of Purdue University became the Permanent Sponsor of the Conferences. These Conferences provide a broadly based forum for researchers actively working on the thermal conduc tivity and closely related properties to convene on a regular basis to exchange their ideas and experiences and report their findings and results. The Conferences have been self-perpetuating and are an example of how a technical community with a common purpose can transcend the invisible, artificial barriers between disciplines and gather together in increasing numbers without the need of national pub licity and continuing funding support, when they see something worthwhile going on. It is believed that this series of Conferences not only will grow stronger, but will set an example for research ers in other fields on how to jointly attack their own problem areas.
Download or read book Internal Radiation Transport and Effective Thermal Conductivity of Fibrous Ceramic Insulation written by Jochen Marschall and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Insulation Materials Testing and Applications 2nd Volume written by Ronald S. Graves and published by ASTM International. This book was released on 1991 with total page 647 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented at the syposium of the same name held in Gatlinburg, Tennessee, October 1991, address issues connected with reflectives, radiant barriers, radiation control coatings; economics and energy impact; long-term thermal performance of foams; assessments and properties of foams; convection
Download or read book Radiation Heat Transfer in Fiber filled Silica Aerogel written by G. R. Cunnington and published by . This book was released on 1997 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Insulation Performance written by D. L. McElroy and published by ASTM International. This book was released on 1980 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Conductivity written by Daniel R. Flynn and published by . This book was released on 1968 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiative Heat Transfer written by Michael F. Modest and published by Academic Press. This book was released on 2021-10-16 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiative Heat Transfer, Fourth Edition is a fully updated, revised and practical reference on the basic physics and computational tools scientists and researchers use to solve problems in the broad field of radiative heat transfer. This book is acknowledged as the core reference in the field, providing models, methodologies and calculations essential to solving research problems. It is applicable to a variety of industries, including nuclear, solar and combustion energy, aerospace, chemical and materials processing, as well as environmental, biomedical and nanotechnology fields. Contemporary examples and problems surrounding sustainable energy, materials and process engineering are an essential addition to this edition. - Includes end-of-chapter problems and a solutions manual, providing a structured and coherent reference - Presents many worked examples which have been brought fully up-to-date to reflect the latest research - Details many computer codes, ranging from basic problem solving aids to sophisticated research tools
Download or read book Effective Thermal Conductivity of High Temperature Insulations for Reusable Launch Vehicles written by Kamran Daryabeigi and published by . This book was released on 1999 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Conductivity 26 written by Ralph B. Dinwiddie and published by DEStech Publications, Inc. This book was released on 2005 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Major edited presentations of new developments in materials science and technology.
Download or read book An Investigation of Thermal Insulating Materials for Undersea Habitats written by Lawrence B. Taylor and published by . This book was released on 1966 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Details and results of a literature search and study of thermal insulating materials for use at elevated pressures in atmospheres suitable for breathing are presented herein. Sufficient theory and data were found to permit determination of heat loss data of some insulating materials, assuming all the gas within the insulation was replaced by the breathing gas mixture. The accuracy of the theoretical values, the degree to which the gas mixture permeates the insulation, and the significance of the gas pressure in the permeation process remain to be determined experimentally. (Author).
Download or read book Thermal Conductivity written by and published by . This book was released on 1965 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Radiation and Conduction Heat Transfer in Fibrous High Temperature Insulations written by Edmund J. Rolinski and published by . This book was released on 1967 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The experimental investigation was concerned with understanding the mechanisms by which fibrous insulations attenuate the transfer of thermal energy. Three fibrous insulation materials, Dynaquartz, Sapphire Wool, and Dynaflex, were evaluated for their usefulness in the high temperature environment. Effective thermal conductivities were measured in air, argon, and vacuum up to 2500 deg F. Transmission experiments were carried out to evaluate the relative contribution of radiation attenuation parameters for Dynaquartz.
