3 edition of Computational analysis of the flowfield of a two-dimensional ejector nozzle found in the catalog.
Computational analysis of the flowfield of a two-dimensional ejector nozzle
by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va
Written in English
|Statement||Y.H. Choi and W.Y. Soh.|
|Series||NASA contractor report -- 185255., NASA contractor report -- NASA CR-185255.|
|Contributions||Soh, Woo-Yung., United States. National Aeronautics and Space Administration.|
|The Physical Object|
Flow Analysis and Optimization of Supersonic Rocket Engine Nozzle at Various Divergent Angle using Computational Fluid Dynamics (CFD) Karna S. Patel (, U.V. Patel college of Engineering, Ganpat University) Abstract: CFD is a branch of Fluid Mechanics which rely File Size: KB. Modelling and Computational Fluid Dynamic Analysis on Jet Nozzle 1Shaik Khaja Hussain, 2B V Amarnath Reddy, 3A V Hari Babu 1Research Scholar, The flow through a converging-diverging nozzle is used for modeling the compressible flow through computational fluid dynamics.
Anil K.N., Nicholas, T.M.T. 'Computational Flow Simulation and Prediction of Cell Pressure for Zero-Flow Ejectors'. Aeronautical Socicty of India Conference, lIT, Madras, January Anderson, BJI. 'Factors Which Influcnce the Analysis and Dcsign of Ejector Nozzles'. American Institute ofAeronautics and Astronautics Paper No. One-dimensional Model of an Optimal Ejector and Parametric Study of Ejector Efficiency Ronan K. McGoverna, Kartik V. Bulusub, Mohammed A. Antarc and John H. Lienhard Vd a Massachusetts Institute of Technology, Cambridge, MA, U.S.A., [email protected] b The George Washington University, Washington D.C., U.S.A., [email protected] c King Fahd University of Petroleum .
Book Chapters  Uzun A., Blaisdell G. A., and Lyrintzis, A. S. "Coupling of Integral Acoustics Methods with LES for Jet Noise Prediction," in Jet Aeroacoustics, edited by G. Raman, Multi-Science Publishing Company, Essex, UK, July , pp. ; also published as refereed journal article . Title: Numerical flowfield analysis of advanced rocket nozzles: Authors: Hagemann, G.; Krülle, G.; Hannemann, K. Publication: Aerothermodynamics for space vehicles.
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Ical or computational approach is necessary to aid the understanding of experimental results and to provide some guidelines for the ongoing experiment.
In the present study as a preliminary step to analyzing the flowfield inside the mixer-ejector nozzle, the simplified two-dimensional ejector tested at NASA *Members AIAA. A time-iterative full Navier-Stokes code, PARC, is used to analyze the flowfield of a two-dimensional ejector nozzle system.
A parametric study was performed for two controlling parameters, duct to nozzle area ratio and nozzle pressure ratio. Results show that there is an optimum area ratio for the efficient pumping of secondary flow.
Computational analysis of the flowfield of a two-dimensional ejector nozzle [microform] / Y.H. Choi and W.Y. Soh National Aeronautics and Space Administration ; For sale by the National Technical Information Service [Washington, DC]: [Springfield, Va Australian/Harvard Citation.
Choi, Y. & Soh, W. & United States. Summary A computational study of the flowfield in a two-dimensional ejector nozzle has been described. The flow feature inside the ejector nozzle system is com- plicated by strong inviscid/viscous interaction, freestream entrainment, shock cell structure, and the presence of both supersonic and subsonic flow.
A time-iterative full Navier-Stokes code, PARC, is used to analyze the flowfield of a two-dimensional ejector nozzle system. A parametric study was performed for two controlling parameters, duct to nozzle area ratio and nozzle pressure ratio.
Results show that there is an optimum area ratio for the efficient pumping of secondary by: 9. A time-iterative full Navier-Stokes code, PARC, is used to analyze the flowfield of a two-dimensional ejector nozzle system. A parametric study was performed for two controlling parameters, duct to nozzle area ratio and nozzle pressure ratio.
Results show that there is an optimum area ratio for the efficient pumping of secondary : W. Soh and Y. Choi.
Computation of Two-Dimensional, Viscous Nozzle Flow. Michael C. Cline ; Michael C. Cline. University of California, Los Alamos, New Mex. A computational analysis of the transonic flow field of two-dimensional minimum length by: ejector equipped with an oscillating C-D nozzle.
COMPUTATIONAL METHODOLOGY A rectangular section ejector with oscillating C-D nozzle is tested by two-dimensional computation. The nozzle domain will oscillate between points A and B about an axis C as shown in Fig. Mesh has been refined near to the wall and at interface between two : Arun Kodamkayath Mani, Shaligram Tiwari, Mani Annamalai.
computational analysis, and results are discussed. III. Design Philosophy The presence of a zone of separation and recirculation near the inner surface of the clamshells had detrimental eﬀects on the advantages of the ejector nozzle with clamshell doors, such as Cited by: 5. The schematic and dimensions of the geometries used in numerical model is shown in Fig.
convergent part has a length of 30 mm and is attached to the throat part as well as the following divergent part with a length of 40 mm. Elliptical nozzles and rectangular nozzles with different Width/Length (W/L) of the cross-section were employed, namely,and Cited by: Computational and Experimental Flowfield Analyses of Separate Flow Chevron Nozzles and Pylon Interaction.
Turbulence Measurements of Separate-Flow Nozzles with Pylon Interaction Using Particle Image Velocimetry. Computational analysis of a pylon-chevron core nozzle interaction.
Get this from a library. Computational analysis of the flowfield of a two-dimensional ejector nozzle. [Y H Choi; W Y Soh; United States. National Aeronautics and Space Administration.]. A time-iterative full Navier-Stokes code, PARC, is used to analyze the flowfield of a two-dimensional ejector nozzle system.
A method is proposed for calculating the two-dimensional nonviscous flows in ejector nozzles of arbitrary shape, for two operating cycles: the subsonic flow cycle of a secondary stream and a cycle when the secondary stream attains critical velocity, i.e., it is cut off. In the second case, the possibility is allowed for the appearance of a direct compression shock in the supersonic part of the Author: V.
Puzyrev, R. Tagirov. A parametric study was performed for two controlling parameters, duct to nozzle area ratio and nozzle pressure ratio. Results show that there is an optimum area ratio for the efficient pumping of.
A computational analysis of the two-dimensional supersonic inviscid flowfield in a second-throat ejector-diffuser (STED) system is presented. A second-order high-resolution scheme for solving the new Lagrangian Euler equations is employed to accurately resolve the complicated shock patterns and associated slip lines and their interactions.
The influence of nozzle position on the performance of an ejector was analyzed qualitatively with free jet flow model.
Experimental investigations and computational fluid dynamics (CFD) analysis of the nozzle position of the subsonic ejector were also conducted. The results show that there is an optimum nozzle position for the ejector.
The ejecting coefficient reaches its maximum Cited by: 2. The computational simulations used for comparison apply k-ε renormalization group (RNG) and k-ω shear stress transport (SST) turbulence models to two-dimensional (2D), locally refined rectangular meshes for ideal gas air flow.
A complementary analytical model is constructed from first principles to approximate the ejector flow by: The ejector nozzle flowfield was solved on an unstructured grid using the unstructured grid solver in Wind-US The objective was to validate the unstructured solver for the ejector nozzle flow.
The input and output files and comparisons of the velocity and total temperature profiles can be found on the Unstructured Ejector Nozzle page. The present study analyzes and characterizes the irreversibility of the ejector’s internal processes in an effort to improve the understanding of the making of its overall performance.
The analysis presented is based on entropy production by:. The flowfield of a two-dimensional, single-nozzle (method of characteristics profile) ejector was investigated to improve the design optimization process for ejectors. A series of detailed time-accurate wall-pressure measurements were undertaken using.Generally, there is a blower or an ejector in a hydrogen recirculation system [, ].Compared with hydrogen blowers, ejectors have advantages of small volume, no parasitic power consumption, low cost, no noise and no vibration during operation [, ].Fig.
1 shows a simplified hydrogen recirculation system with an ejector. In this system, the primary gas flows into the ejector when its Cited by: 2.Many engineers are actively involved in design and analysis using computational simple definition of aerodynamics is 50% flowfield, 50% geometry).
The simplest fluid mechanics † Hamming authored a numerical methods book many years ago. The quotation cited is the frontispiece of the Size: 1MB.