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Monday, May 18, 2020 | History

3 edition of The effects of atomic oxygen on the thermal emittance of high temperature radiator surfaces found in the catalog.

The effects of atomic oxygen on the thermal emittance of high temperature radiator surfaces

The effects of atomic oxygen on the thermal emittance of high temperature radiator surfaces

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  • 28 Currently reading

Published by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va .
Written in English

    Subjects:
  • Oxygen.,
  • Heat -- Radiation and absorption.

  • Edition Notes

    StatementSharon K. Rutledge and Deborah L. Hotes and Phillip E. Paulsen.
    SeriesNASA technical memorandum -- 103224.
    ContributionsHotes, Deborah L., Paulsen, Phillip E., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15353761M

    Proc. SPIE , Optical Systems Contamination and Degradation, pg (27 October ); doi: / FM Battlefield Weather Effects there must be a temperature or thermal contrast between target and background area (signature). and high humidity. Temperature affecting atmospheric.

    Cooling rates were relatively low to minimize thermal shock effects. Each cycle consisted of 1 hr at the higher temperature and 1/2 hr at the lower temperature. Samples were tested up to cycles. The extent of attack was determined by specific weight change which was continuously by:   Researchers study thermodynamic processes in an ultra-high temperature molten oxide. alumina electrolyte to oxygen gas and aluminum alloy by electrolysis for the first time.

    Lecture 13 Chapter 18 Temperature, Heat, and the First Law of Thermodynamics •Temperature and Thermal Equilibrium •Linear Expansion •Heat and Energy Transfer and Specific Heat •Thermal Conductivity •Work and the First Law of Thermodynamics – ΔE int = Q File Size: 2MB. American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA


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The effects of atomic oxygen on the thermal emittance of high temperature radiator surfaces Download PDF EPUB FB2

The Effects of Atomic Oxygen on the Thermal Emittance of High Temperature Radiator Surfaces Sharon K. Rutledge Lewis Research Center Cleveland, Ohio and Deborah L. Hotes and Phillip E. Paulsen Cleveland State University Cleveland, Ohio Prepared for the Spring Meeting of the Materials Research Society San Diego, California, AprilNASA.

Get this from a library. The effects of atomic oxygen on the thermal emittance of high temperature radiator surfaces. [Sharon K Rutledge; Deborah L Hotes; Phillip E Paulsen; United States.

National Aeronautics and Space Administration.]. Rutledge, D. Hotes and P. Paulsen, The effects of atomic oxygen on the thermal emittance of high temperature radiator surfaces, NASA TMY.

by: 4. The effects of atomic oxygen on the thermal emittance of high temperature radiator surfaces Radiator surfaces on high temperature space power systems such as the SP space nuclear power system must maintain a high emittance level in order to reject waste heat effectively.

one of the primary materials under consideration for the radiators. High Temperature Radiator Materials for Applications in the Low Earth based on density, thermal conductivity, me1 ting temperature, atomic oxygen durabi 1 i ty, and ease of fabrication.

radiator surfaces. The total emittance of a few selected samples was obtained. the study of the effects of atomic oxygen erosion on the microstructure and property of vo2 thermochromic coating using csa’s space simulation apparatus Chapter July with 17 Reads.

Thermal radiation, also known as heat, is the emission of electromagnetic waves from all matter that has a temperature greater than absolute zero. It represents the conversion of thermal energy into electromagnetic energy. Thermal energy consists of the kinetic energy of random movements of atoms and molecules in matter.

In either case, the surface of the radiator must have a high emittance at the desired operating temperature, envisioned to be in the range of to K, and must be durable for the length of Author: Ivana Hrbud.

Space Systems Thermal Control Surfaces. High-emittance surfaces for high-temperature space radiator applications. Bruce A. Banks, Sharon K. Miller, Space station atomic-oxygen-resistant coatings.

James L. Grieser. Introduction. Materials used on exterior spacecraft surfaces are subjected to many environmental threats that can cause degradation. These threats include photon radiation, charged-particle radiation, temperature effects and thermal cycling, impacts from micrometeoroids and debris, contamination, and low Earth orbit atomic by: THERMAL RADIATION AND ITS EFFECTS AlTENUATION OF THERMAL namely, absorption and scattering.

1 RADIATION Atoms and molecules present in the capable of absorbing, and thus re The extent of mJ~r~ or damage moving, certain portions of File Size: 4MB. Fifty-one papers (and three keynote addresses) on contemporary theoretical issues and experimental techniques pertaining to the underlying factors that control heat-conduction behavior of materials.

The latest findings on insulation, fluids, and low-dimensional solids and composites are reviewed as5/5(1). A comprehensive classified list of annotated references on surfaces which combine high solar absorptance with low thermal emittance is presented, covering the period – The list embraces papers printed in scientific journals and in published conference proceedings.

An index of authors and on surface coatings studied is by: A piece of pure copper has an ASTM grain size of 8 and a yield strength of 45, psi.

If it is heated to a temperature where diffusion can occur and held for an extended period of time, we would expect the resulting material to be ___ and have ___ grains.

At a given elevated temperature, diffusion of atoms would be easiest for atom movement: Along free surfaces A piece of pure copper has an ASTM grain size of 8 and a yield strength of 45, psi.

Temperature Temperature can be defined informally as the measure of a region's "hotness". A region which is "hot" has a higher temperature than one that is "cold". Two regions have the same temperature when there is no net exchange of internal energy between them.

Heat flows from one region to another due to a difference in temperature. This dissertation, written by Rostislav Hrubiak, and entitled Exploring thermal and mechanical properties of selected elements and compounds under extreme conditions: Experiments at high pressures and high temperatures having been approved in respect to style and intellectual content, is.

Heat and temperature are not the same thing. Heat energy is the total kinetic energy of the atoms of a substance.; Temperature is the average kinetic energy of the atoms of a substance.; Each atom has a certain amount of kinetic energy.

This energy fluctuates due to the many collisions with other atoms. 2) The final temperature for the white object is lower than for the black object. 3) The white object will take longer than the black object to reach its final temperature.

4) The black object behaves like a blackbody. Blackbodies are said to be perfect emitters and perfect absorbers. Let's assume there is excellent thermal conductivity from the heater to the block, and from the block to the inner surface of the radiator.

This is a convective radiator. The rate of transfer of heat energy depends linearly on the difference in temperature between the block and the air. surface temperature. This temperature is defined as the temperature a surface would get if it absorbs no heat.

In an electrical analogy it is the potential of a point between the potentials corresponding to the radiation temperature and the gas temperature as visualized in Fig. 2. (4 4) () q tot′′ =εσTAST −Ts +hc TAST −Ts (13) Tr Tg.Black-body radiation is the thermal electromagnetic radiation within or surrounding a body in thermodynamic equilibrium with its environment, emitted by a black body (an idealized opaque, non-reflective body).

It has a specific spectrum of wavelengths, inversely related to intensity that depend only on the body's temperature, which is assumed for the sake of calculations and theory to be.

Purchase Physics of High-Temperature Reactors - 1st Edition. Print Book & E-Book. ISBNBook Edition: 1.