Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Experimental Investigation Of Roughness And Blowing Effects Over Ablator Like Surfaces
Download Experimental Investigation Of Roughness And Blowing Effects Over Ablator Like Surfaces full books in PDF, epub, and Kindle. Read online Experimental Investigation Of Roughness And Blowing Effects Over Ablator Like Surfaces ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Experimental Investigation of Roughness and Blowing Effects Over Ablator-like Surfaces by : Colby Borchetta
Download or read book Experimental Investigation of Roughness and Blowing Effects Over Ablator-like Surfaces written by Colby Borchetta and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of the Problem of Surface Roughness by : H. Schlichting
Download or read book Experimental Investigation of the Problem of Surface Roughness written by H. Schlichting and published by . This book was released on 1937 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the universal laws of turbulent velocity distribution at rough and smooth walls, there is in the present work presented a method that allows surface roughness tests and in particular, measurements on the roughness of ship surfaces to be carried out in a much simpler manner. The types of roughness investigated were in the form of flat, rough plates installed in a square-section rectangular channel, the other three walls always being smooth. Twenty-one plates of various roughness were investigated, the roughness elements being the following: spheres of diameter 0.41 and 0.21, respectively, spherical segments, cones, and "short" and "long" angles.
Book Synopsis Experimental Investigation of Surface Roughness Effects on Heat Transfer from Discretely-heated Protruding Surfaces by : Mesfin Wolde Medhin
Download or read book Experimental Investigation of Surface Roughness Effects on Heat Transfer from Discretely-heated Protruding Surfaces written by Mesfin Wolde Medhin and published by . This book was released on 1994 with total page 350 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 1966 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of the Aerodynamic Effects of Roughness Consisting of Arrays of Depressions in Surfaces by :
Download or read book An Experimental Investigation of the Aerodynamic Effects of Roughness Consisting of Arrays of Depressions in Surfaces written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AIAA 28th Aerospace Sciences Meeting by :
Download or read book AIAA 28th Aerospace Sciences Meeting written by and published by . This book was released on 1990 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Thermochemical Nonequilibrium on Hypersonic Boundary-Layer Instability in the Presence of Surface Ablation Or Isolated Two-Dimensional Roughness by : Clifton Mortensen
Download or read book Effects of Thermochemical Nonequilibrium on Hypersonic Boundary-Layer Instability in the Presence of Surface Ablation Or Isolated Two-Dimensional Roughness written by Clifton Mortensen and published by . This book was released on 2015 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current understanding of the effects of thermochemical nonequilibrium on hypersonic boundary-layer instability still contains uncertainties, and there has been little research into the effects of surface ablation, or two-dimensional roughness, on hypersonic boundary-layer instability. The objective of this work is to study the effects of thermochemical nonequilibrium on hypersonic boundary-layer instability. More specifically, two separate nonequilibrium flow configurations are studied: 1) flows with graphite surface ablation, and 2) flows with isolated two-dimensional surface roughness. These two flow types are studied numerically and theoretically, using direct numerical simulation and linear stability theory, respectively. To study surface ablation, a new high-order shock-fitting method with thermochemical nonequilibrium and finite-rate chemistry boundary conditions for graphite ablation is developed and validated. The method is suitable for direct numerical simulation of boundary-layer transition in a hypersonic real-gas flow with graphite ablation. The new method is validated by comparison with three computational data sets and one set of experimental data. Also, a thermochemical nonequilibrium linear stability theory solver with a gas phase model that includes multiple carbon species, as well as a linearized surface graphite ablation model, is developed and validated. It is validated with previously published linear stability analysis and direct numerical simulation results. A high-order method for discretizing the linear stability equations is used which can easily include high-order boundary conditions. The developed codes are then used to study hypersonic boundary-layer instability for a 7 deg half angle blunt cone at Mach 15.99 and the Reentry F experiment at 100~kft. Multiple simulations are run with the same geometry and freestream conditions to help separate real gas, blowing, and carbon species effects on hypersonic boundary-layer instability. For the case at Mach 15.99, a directly simulated 525~kHz second-mode wave was found to be significantly unstable for the real-gas simulation, while in the ideal-gas simulations, no significant flow instability is seen. An N factor comparison also shows that real-gas effects significantly destabilize the flow when compared to an ideal gas. Blowing is destabilizing for the real gas simulation and has a negligible effect for the ideal gas simulation due to the different locations of instability onset. Notably, carbon species resulting from ablation are shown to slightly stabilize the flow for both cases. For the Reentry F flow conditions, inclusion of the ablating nose cone was shown to increase the region of second mode growth near the nose cone. Away from the nose cone, the second mode was relatively unaffected. Experimental and numerical results have shown that two-dimensional surface roughness can stabilize a hypersonic boundary layer dominated by second-mode instability. It is sought to understand how this physical phenomenon extends from an airflow under a perfect gas assumption to that of a flow in thermochemical nonequilibrium. To these ends, a new high-order shock-fitting method that includes thermochemical nonequilibrium and a cut-cell method, to handle complex geometries unsuitable for structured body-fitted grids, is presented. The new method is designed specifically for direct numerical simulation of hypersonic boundary-layer transition in a hypersonic real-gas flow with arbitrary shaped surface roughness. The new method is validated and shown to perform comparably to a high-order method with a body-fitted grid. For a Mach 10 flow over a flat plate, a two-dimensional roughness element was found to stabilize the second mode when placed downstream of the synchronization location. This result is consistent with previous results for perfect-gas flows. For a Mach 15 flow over a flat plate, a two-dimensional surface roughness element stabilizes the second-mode instability more effectively in a thermochemical nonequilibrium flow, than in a corresponding perfect gas flow.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation on Asperity Contact and Surface Roughness by : H. Christensen
Download or read book An Experimental Investigation on Asperity Contact and Surface Roughness written by H. Christensen and published by . This book was released on 1966 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of Surface Roughness by : H. Schlichting
Download or read book Experimental Investigation of Surface Roughness written by H. Schlichting and published by . This book was released on 1937 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fundamental Studies of the Structure of Hypersonic Attached and Separated Boundary Layers Over Smooth, Rough and Transpiration-Cooled Surfaces by :
Download or read book Fundamental Studies of the Structure of Hypersonic Attached and Separated Boundary Layers Over Smooth, Rough and Transpiration-Cooled Surfaces written by and published by . This book was released on 1991 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: A program of fundamental experimental research and analysis has been conducted to examine two key areas associated with the design of hypersonic vehicles for re-entry and sustained hypervelocity flight. In the first, and major segment of the program, detailed measurements were obtained to examine the thermo-fluid dynamics of transpiration-cooling and the separate and combined effects of surface roughness and blowing on the fluid mechanics of transpiration and ablative thermal protection systems. In the second segment of the program, we embarked in a detailed experimental examination of turbulent compressibility effects in regions of attached and separated flows. The first phase of this program was devoted to studies associated with developing the models and instrumentation to obtain highly resolved high frequency measurements in fully turbulent boundary layer at Mach 11, 13, and 15. While in the second phase of this program, segments were concentrated on the development of the direct measurement of density fluctuations using high pressure electron beam techniques. During this contract we also took the opportunity to analyze and publish important measurements made in an earlier program demonstrating compressibility effects in hypersonic turbulent wakes. Experimental Research, Hypersonic Vehicles, Attached, Separated, Transpiration Cooling, Surface Roughness and Blowing, Ablative Thermal Protection Systems, Compressibility Effects, Head Transfer, Skin Friction Electron Beam Technique, Density Measurements.
Download or read book AIAA 86-0251 - AIAA 86-0298 written by and published by . This book was released on 1986 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 41st AIAA Aerospace Sciences Meeting & Exhibit by :
Download or read book 41st AIAA Aerospace Sciences Meeting & Exhibit written by and published by . This book was released on 2003 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Research on the Effects of Surface Roughness on the Cross-flow Around Circular Cylinders by : Guido Buresti
Download or read book Experimental Research on the Effects of Surface Roughness on the Cross-flow Around Circular Cylinders written by Guido Buresti and published by . This book was released on 1980 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Heat Transfer written by and published by . This book was released on 1978 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP. written by and published by . This book was released on 1992 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Roughness Effects on Boundary-layer Transition for Blunt-leading-edge Plates at Mach 6 by : Paul F. Holloway
Download or read book Roughness Effects on Boundary-layer Transition for Blunt-leading-edge Plates at Mach 6 written by Paul F. Holloway and published by . This book was released on 1966 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: