Download or read book Solutions of the Ionized Radiating Shock Layer written by John T. Howe and published by . This book was released on 1963 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stagnation point Solutions for Inviscid Radiating Shock Layers written by Walter B. Olstad and published by . This book was released on 1970 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inviscid Radiating Shock Layers about Spheres Traveling at Hyperbolic Speeds in Air written by Richard W. Barnwell and published by . This book was released on 1969 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time-dependent finite-difference techniques are used to obtain numerical solutions for the problem of the inviscid flow of radiating equilibrium air past sphere traveling at hyperbolic speeds. The effects of absorption are included, and results are presented for both gray and nongray absorption coefficient models for spheres with different radii. It is shown that the nondimensional heat-flux distributions for the gray and nongray models are similar and that these distributions are weak functions of the radius of the sphere and the altitude and strong functions of the flight velocity.
Download or read book NASA Technical Report written by United States. National Aeronautics and Space Administration and published by . This book was released on 1971 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solutions of Blunt body Stagnation region Flows with Nongray Emission and Absorption of Radiation by a Time asymptotic Technique written by Linwood B. Callis and published by . This book was released on 1969 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A second-order time-asymptotic solution to radiation-coupled stagnation-region flows is presented. The solution is applied to the hypervelocity flow over blunt vehicles of inviscid, nonconducting, equilibrium air, emitting and absorbing nongray radiation. Velocities, nose radii, and altitudes covered by the analysis are sufficient to bracket reentry trajectories of current interest. Radiative heat-transfer rates for the range of interest and typical profiles of pressure, density, enthalpy, temperature, and velocity are shown. The nature of time-asymptotic solution is discussed and it is shown o be a feasible means of achieving second-order accurate solutions to radiation-coupled shock-layer flows. Step-function models of the absorption coefficient are used in order to evaluate the divergence of the radiation flux vector. An analysis is carried out to determine what effect variations in the spectral complexity of the step model absorption coefficients used in the analysis will have on the thermodynamic and flow profiles of interest and on the nongray radiative heat-transfer rates. In this connection use is made of consistent model absorption coefficients having one to nine spectral steps with free-free, free-bound (including atomic line transitions), and molecular transitions taken into account. Relatively simple models of the absorption coefficient can be used with no significant loss of accuracy. An existing correlation for the cooling factor, the ratio of the radiation heat-transfer rate to the adiabatic radiation heat-transfer rate, is extended to larger velocities than heretofore considered.
Download or read book Mass Addition in the Stagnation Region for Velocity Up to 50 000 Feet Per Second written by John T. Howe and published by . This book was released on 1964 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solutions of the viscous shock layer equations with mass addition are obtained. Flow-field equations include the effects of heat conduction, diffusion of reacting species, and emission and absorption of gaseous radiation for dissociated and partially ionized air in chemical equilibrium. Convective and radiative heating rates with mass addition are obtained from the solutions. Algebraic equations are derived for predicting the nose radius that minimizes total heating rates at a given flight speed and shock-layer pressure level. Values for the corresponding natural ablation rate, the effective heat of ablation, the ratio of radiative to convective heating rate, surface shear stress, and shock-wave standoff distance are given. The effects of ablated gases that radiate more strongly than air are examined. Solutions without mass addition at low Reynolds numbers where external vorticity, energy depletion, and flow energy limiting are important are compared with existing theory and experiments.
Download or read book NASA Reference Publication written by and published by . This book was released on 1991 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Design Principles of Spacecraft and Entry Bodies written by Jerry Bevans and published by Elsevier. This book was released on 2012-12-02 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in Astronautics and Aeronautics, Volume 21: Thermal Design Principles of Spacecraft and Entry Bodies is a collection of technical papers drawn mainly from the American Institute of Aeronautics and Astronautics Third Thermophysics Specialist Conference, held in Los Angeles, California on June 24-26, 1968 This volume is divided into three parts. The first part covers some aspects of thermal processes and design, including thermal analysis, convection, radiation, ablation, and space rocket effects. The second part surveys the remote measurements of the thermophysical and thermal radiation properties and joint conductance, which are critical criteria for space thermal design. The third part focuses on the space environmental effects on thermal coatings. This part deals first with the theory of radiative degradation, followed by a presentation of the laboratory measurements. This part also looks into the results of several flight experiments. This book will be of great value to thermophysicists, space engineers, and designers who are working in the space science fields.
Download or read book Proceedings of the NASA University Conference on the Science and Technology of Space Exploration written by and published by . This book was released on 1962 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Dynamics in Space Exploration written by United States. National Aeronautics and Space Administration and published by . This book was released on 1963 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the NASA University Conference on the Science and Technology of Space Exploration Chicago Illinois November 1 3 1962 written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1962 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Note written by and published by . This book was released on 1970 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adventures in Research written by Edwin Phelps Hartman and published by . This book was released on 1970 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ablation and Radiation Coupled Viscous Hypersonic Shock Layers Volume 1 written by and published by . This book was released on 1971 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Convective Heat Transfer in Planetary Gases written by Joseph G. Marvin and published by . This book was released on 1965 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Equilibrium convective heat transfer in several real gases was investigated. The gases considered were air, nitrogen, hydrogen, carbon dioxide, and argon. Solutions to the similar form of the boundary-layer equations were obtained for flight velocities to 30,000 ft/sec for a range of parameters sufficient to define the effects of pressure level, pressure gradient, boundary-layer-edge velocity, and wall temperature. Results are presented for stagnation-point heating and for the heating-rate distribution. For the range of parameters investigated the wall heat transfer depended on the transport properties near the wall and precise evaluation of properties in the high-energy portions of the boundary layer was not needed. A correlation of the solutions to the boundary-layer equations was obtained which depended only on the low temperature properties of the gases. This result can be used to evaluate the heat transfer in gases other than those considered. The largest stagnation-point heat transfer at a constant flight velocity was obtained for argon followed successively by carbon dioxide, air, nitrogen, and hydrogen. The blunt-body heating-rate distribution was found to depend mainly on the inviscid flow field. For each gas, correlation equations of boundary-layer thermodynamic and transport properties as a function of enthalpy are given for a wide range of pressures to a maximum enthalpy of 18,000 Btu/lb.
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1961 with total page 1274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
