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Flow Analysis And Design Optimization Methods For Nozzle Afterbody Of A Hypersonic Vehicle
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722401399 Total Pages :64 pages Book Rating :4.4/5 (13 download)
Book Synopsis Flow Analysis and Design Optimization Methods for Nozzle Afterbody of a Hypersonic Vehicle by : National Aeronautics and Space Administration (NASA)
Download or read book Flow Analysis and Design Optimization Methods for Nozzle Afterbody of a Hypersonic Vehicle written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-06 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the methods developed for the aerodynamic analysis and the shape optimization of the nozzle-afterbody section of a hypersonic vehicle. Initially, exhaust gases were assumed to be air. Internal-external flows around a single scramjet module were analyzed by solving the three dimensional Navier-Stokes equations. Then, exhaust gases were simulated by a cold mixture of Freon and Argon. Two different models were used to compute these multispecies flows as they mixed with the hypersonic airflow. Surface and off-surface properties were successfully compared with the experimental data. In the second phase of this project, the Aerodynamic Design Optimization with Sensitivity analysis (ADOS) was developed. Pre and post optimization sensitivity coefficients were derived and used in this quasi-analytical method. These coefficients were also used to predict inexpensively the flow field around a changed shape when the flow field of an unchanged shape was given. Starting with totally arbitrary initial afterbody shapes, independent computations were converged to the same optimum shape, which rendered the maximum axial thrust. Baysal, Oktay Unspecified Center...
Book Synopsis Flow Analysis and Design Optimization Methods for Nozzle Afterbody of a Hypersonic Vehicle by : Oktay Baysal
Download or read book Flow Analysis and Design Optimization Methods for Nozzle Afterbody of a Hypersonic Vehicle written by Oktay Baysal and published by . This book was released on 1992 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flow Analysis and Design Optimization Methods for Nozzle Afterbody of a Hypersonic Vehicle by : Oktay Baysal
Download or read book Flow Analysis and Design Optimization Methods for Nozzle Afterbody of a Hypersonic Vehicle written by Oktay Baysal and published by . This book was released on 1992 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Results for a Hypersonic Nozzle/afterbody Flow Field by : Frank W. Spaid
Download or read book Experimental Results for a Hypersonic Nozzle/afterbody Flow Field written by Frank W. Spaid and published by . This book was released on 1995 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1993 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 940 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 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design Optimization of Hypersonic Test Facility Nozzle Contours Using Splined Corrections by :
Download or read book Design Optimization of Hypersonic Test Facility Nozzle Contours Using Splined Corrections written by and published by . This book was released on 2005 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: A procedure is presented to design and optimize the contour of a hypersonic wind tunnel nozzle with a goal of minimizing exit flow nonuniformity. The procedure uses a Navier-stokes solver that admits chemical and vibrational nonequilibrium thermodynamics and high-pressure effects. The two-step optimization process is accomplished with a basic least-squares optimization (LSO) method. The first step of the design procedure begins with an existing inviscid irrotational method of characteristics (MOC) that is limited to thermally and calorically perfect gas (TCPG). MOC is used to design an inviscid contour, which is then corrected with a boundary layer displacement thickness from an integral momentum formulation. The deleterious effects of the TCPG assumption are ameliorated by using an effective specific-heat ratio an effective gas constant the TCPG computation yields the same exit Mach number and velocity as a quasi-one-dimensional computation based on thermochemical equilibrium. The MOC based contour is then formally optimized using the LSO method, treating various MOC program input variables as formal design parameters. The objective function is the square deviation of flow properties from target values at the nozzle exit, excluding the boundary layer, and is computed with the Navier-Stokes solver. The flow properties chosen for the objective function are the velocity components and the static pressure and density. After the MOC contour is optimized, the second step of the optimization procedure commences. In the second step, the contour is further perturbed by adding a small correction distribution represented as a cubic spline fitted to a limited number of nodes along the contour. The correction values of the nozzle radius are the formal design parameters for the next application of LSO.
Download or read book Journal of Aircraft written by and published by . This book was released on 1999 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1993 with total page 1786 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis Development and Testing of a New Optimum Design Code for Hypersonic Wind Tunnel Nozzles, Including Boundary Layer, Turbulence, and Real Gas Effects by : Ralph C. Tolle
Download or read book Development and Testing of a New Optimum Design Code for Hypersonic Wind Tunnel Nozzles, Including Boundary Layer, Turbulence, and Real Gas Effects written by Ralph C. Tolle and published by . This book was released on 1996 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Evolutionary and Deterministic Methods for Design, Optimization and Control in Engineering and Sciences by : Edmondo Minisci
Download or read book Advances in Evolutionary and Deterministic Methods for Design, Optimization and Control in Engineering and Sciences written by Edmondo Minisci and published by Springer. This book was released on 2018-07-02 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents up-to-date material on the state of the art in evolutionary and deterministic methods for design, optimization and control with applications to industrial and societal problems from Europe, Asia, and America. EUROGEN 2015 was the 11th of a series of International Conferences devoted to bringing together specialists from universities, research institutions and industries developing or applying evolutionary and deterministic methods in design optimization, with emphasis on solving industrial and societal problems. The conference was organised around a number of parallel symposia, regular sessions, and keynote lectures focused on surrogate-based optimization in aerodynamic design, adjoint methods for steady & unsteady optimization, multi-disciplinary design optimization, holistic optimization in marine design, game strategies combined with evolutionary computation, optimization under uncertainty, topology optimization, optimal planning, shape optimization, and production scheduling.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1995 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723048968 Total Pages :116 pages Book Rating :4.0/5 (489 download)
Book Synopsis Experimental Results for a Hypersonic Nozzle/Afterbody Flow Field by : National Aeronautics and Space Administration (NASA)
Download or read book Experimental Results for a Hypersonic Nozzle/Afterbody Flow Field written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was conducted to experimentally characterize the flow field created by the interaction of a single-expansion ramp-nozzle (SERN) flow with a hypersonic external stream. Data were obtained from a generic nozzle/afterbody model in the 3.5 Foot Hypersonic Wind Tunnel at the NASA Ames Research Center, in a cooperative experimental program involving Ames and McDonnell Douglas Aerospace. The model design and test planning were performed in close cooperation with members of the Ames computational fluid dynamics (CFD) team for the National Aerospace Plane (NASP) program. This paper presents experimental results consisting of oil-flow and shadow graph flow-visualization photographs, afterbody surface-pressure distributions, rake boundary-layer measurements, Preston-tube skin-friction measurements, and flow field surveys with five-hole and thermocouple probes. The probe data consist of impact pressure, flow direction, and total temperature profiles in the interaction flow field. Spaid, Frank W. and Keener, Earl R. and Hui, Frank C. L. Ames Research Center AFTERBODIES; FLOW DISTRIBUTION; FLOW VISUALIZATION; GAS STREAMS; HYPERSONIC FLOW; NOZZLE FLOW; WIND TUNNEL TESTS; COMPUTATIONAL FLUID DYNAMICS; EXHAUST GASES; NATIONAL AEROSPACE PLANE PROGRAM; PRESSURE DISTRIBUTION; SHADOWGRAPH PHOTOGRAPHY; SKIN FRICTION; TEMPERATURE PROFILES...
