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3 edition of Acoustic and aerothermal performance test of the axisymmetric coannular ejector nozzle found in the catalog.

Acoustic and aerothermal performance test of the axisymmetric coannular ejector nozzle

Acoustic and aerothermal performance test of the axisymmetric coannular ejector nozzle

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  • 3 Currently reading

Published by National Aeronautics and Space Administration, Glenn Research Center, Available from NASA Center for AeroSpace Information, National Technical Information Service [distributor in [Cleveland, Ohio], Hanover, MD, Springfield, VA .
Written in English

    Subjects:
  • Jet nozzles -- Noise.,
  • Jet planes -- Noise.,
  • Acoustic properties.,
  • Aeroacoustics.,
  • Effective perceived noise levels.,
  • Noise reduction.,
  • Performance tests.,
  • Plug nozzles.,
  • Ejectors.,
  • Aerodynamic noise.,
  • Jet aircraft noise.,
  • Wind tunnel tests.

  • Edition Notes

    StatementWilliam Herkes.
    Series[NASA contractor report] -- NASA CR-2000-209813., NASA contractor report -- NASA CR-209813.
    ContributionsNASA Glenn Research Center.
    The Physical Object
    FormatMicroform
    Paginationv.
    ID Numbers
    Open LibraryOL15572747M

    The Online Books Page. Online Books by. Langley Research Center. A Wikipedia article about this author is available.. Langley Research Center: A Computer Program for the Determination of the Acoustic Pressure Signature of Helicopter Rotors Due to Blade Thickness (NASA Technical Memorandum X; ), also by Gerald H. Mall and F. Farassat (page images at HathiTrust). Low-speed wind-tunnel investigation of the aerodynamic and acoustic performance of several sonic inlet takeoff and approach Static performance of an axisymmetric nozzle with post-exit vanes for multiaxis thrust vectoring Static test-stand performance of the YF turbofan engine with several exhaust configurations for the Quiet. Analyze the transient response of an ablating axisymmetric body, including the effect of shape change. / ABAXI: Ablative Nozzle Materials: Predict the ablation performance of rocket nozzle heat protection materials. (work-in-progress) / ABLATE: Aeroelastic Analysis: Estimate the planform and aeroelastic effect on stability derivatives and. Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF.


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Acoustic and aerothermal performance test of the axisymmetric coannular ejector nozzle Download PDF EPUB FB2

Acoustic and Aerothermal Performance Test of the Axisymmetric Coannular Ejector Nozzle Volume IIuAcoustic Performance William Herkes The Boeing Commerical Airplane Group, Seattle, Washington Prepared under Contract NAS National Aeronautics and Space Administration Glenn Research Center February Acoustic and propulsion performance testing of a model-scale Axisymmetric Coannular Ejector nozzle was conducted in the Boeing Low-speed Aeroacoustic Facility.

Acoustic and propulsion performance testing of a model-scale Axisymmetric Coannular Ejector nozzle was conducted in the Boeing Low-speed Aeroacoustic Facility. This nozzle is a plug nozzle with an ejector design to provide aspiration of about 20% of the engine flow. Get this from a library.

Acoustic and aerothermal performance test of the axisymmetric coannular ejector nozzle. [William Herkes; NASA Glenn Research Center.]. Acoustic and propulsion performance testing of a model-scale Axisymmetric Coannular Ejector nozzle was conducted in the Boeing Low-speed Aeroacoustic Facility.

This nozzle is a plug nozzle with an ejector design to provide aspiration of about 20% of the engine : William Herkes. Abstract: Method of CFD is used to simulate flow fields for a certain Axisymmetric nozzle, The paper describes the grid adaption, boundary conditions determination as well as RNG model application, and analyzes the nozzle aerodynamic characteristics.

The numerical results match well with test by: 1. Acoustic treatment of the ejector surface becomes a viable means to reduce farfield noise. GEAE is designing appropriate liners for this application.

The objective is to design bulk absorber liners for axisymmetric mixer-ejectors to achieve maximum broadband acoustic suppression in the ejector, to minimize farfield noise impact. Because of the low density of the used gases is the increase of kinetic energy possible only with a nozzle, which has the highest outlet velocity without the change of inlet parameters.

This paper presents an automatable design and CFD simulation method for axisymmetric plug by: 1. through an axisymmetric convergent nozzle have been theoretically and experimentally explored.

Choking criteria of a convergent nozzle flow are proposed from experiment and theory. A nozzle of a variable length from the inlet to exit has been used for the purpose of the boundary layer development on the nozzle.

The ion K&m&n momentum equation for axisymmetric boundary-layer flow (Refs.2, 5) is where Cf is the skin-friction coefficient and B, % are defined by (2a) (2b) where T*= [;()* (2c) For a conical nozzle with expansion an ds = dx set w and if w is smalls0 that seco+l, ds = ax.

Therefore equation (2) may be rewrittenFile Size: KB. We use input-output analysis to predict and understand the aeroacoustics of high-speed isothermal turbulent jets. We consider axisymmetric linear perturbations about Reynolds-averaged Navier-Stokes solutions of ideally expanded turbulent jets with jet Mach numbers File Size: 4MB.

Queensland’s TUSQ lab where a test rig had been developed to emulate the physical geometry and fluid fields expected in an ejector. The test rig was designed to measure the behaviour of the free shear layer between a jet and a co-flowing stream, and ideally produces an axisymmetric flow field (Figure 1).

diffuser probe array s p ETR nozzles. Input-output analysis of heated axisymmetric turbulent jets Jinah Jeun, Joseph W. Nicholsy, and Mihailo R. Jovanovi c z University of Minnesota, Minneapolis, MNUSA Motivated by the recent success of input-output analysis for predicting the aeroacous-tics of axisymmetric isothermal high-speed turbulent jets, we apply input-output analysis.

I am simulating an axisymmetric nozzle. I have an issue with which turbulence model to use. Currently I am using standard K-epsilon and i am not getting any shock wave inside the nozzle.

When I switch to SST K omega i get shock wave in the flow. I would like to ask which is the recommended turbulence model for these type of flow. dimensional nozzle with straight sonic line is used. However, the hypersonic blowers and the rocket motors, use the axisymmetric nozzle. The study in this research is limited for the 2D MLN configuration with straight sonic line.

The works discussed before are File Size: KB. A circular thrust augmenting ejector has an annular wall which defines a central passageway and a convergent contoured inlet section, a constant area cylindrical mixing section and a divergent conical diffuser outlet section.

The inlet, mixing and outlet sections merge one into the next in axisymmetric serial relationship. The ejector also has a plurality of discrete primary nozzles arranged Cited by:   This document provides an example of numerical analysis for a small spherical pressure vessel with an external cylindrical nozzle.

Problem can be analyzed as: Axisymmetric. A nozzle shape optimization study for a quasi-axisymmetric scramjet has been performed for a Mach operating condition with hydrogen fuel, aiming at the application of a hypersonic airbreathing vehicle.

In this study, the nozzle geometry which is parameterized by a set of design variables, is optimized for the single objective of maximum net thrust using an in-house CFD solver for Cited by: 4.

This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. The effect of heat transfer correlations on nozzle performance with various geometrical defects is also discussed. In addition to it, the supersonic flow behavior is also simulated in the nozzles in terms of pressure, temperature, Mach number and density distribution with ablated : M.

Raza. A spherical pressure vessel with a cylindrical nozzle is analysed using the finite element method. Part 1 demonstrates 2D Axisymmetric Analysis using. The mathematical model of the axisymmetric mixer-ejector nozzle is shown in Fig.

It includes all main elements of a real nozzle: mixer-ejector, lobes, flaps, etc. For the optimization of the nozzle geometry, some of these elements were modified: ejector—by moving it forward, pylons—by changing the angles, outer geometry—by by: Initial Flight Test Evaluation of the F ACTIVE Axisymmetric Vectoring Nozzle Performance John S.

Orme Dryden Flight Research Center Edwards, California Ross Hathaway Analytical Services & Materials Edwards, California Michael D. Ferguson United Technologies Corporation Pratt & Whitney West Palm Beach, Florida July Cited by: American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA Turbulent jet characteristics are explored for an axisymmetic and serrated nozzle.

• Numerical solutions are performed on grids from 7 M to 20 M nodes. • Validation against a variety of experimental data is made for the round jet.

• Comparisons of round and chevron jet are made in terms of mean velocities and higher order turbulent Cited by: Effect of triangular tabs with circular perforations on the acoustic far-field of an axisymmetric jet issued from a convergent nozzle of exit diameter of mm was studied for both subsonic and sonic underexpanded cases.

It was found that the noise in the low frequency range (Strouhal number Author: G. Fayaaz Hussain, Afthab Shaban Nasser, Mohammad Mohiudeen Nawaz, Bikash Kumar Mondal, N. Karthikey.

convergent divergent nozzle and variation of area nozzle i.e., isentropic variable area flow nozzle. The adiabatic process of fluid flow with friction and without friction is discussed and reasonably possible conditions are stated for our problem.

Programming code of adiabatic problem had taken by his book fundamental of compressible flow. SELECTED PERFORMANCE MEASUREMENTS OF THE F ACTIVE The left-hand nozzle was the primary test nozzle because extensive instrumentation had been installed on Selected Performance Measurements of the F ACTIVE Axisymmetric Thrust-Vectoring Nozzle John File Size: KB.

I'm trying to design an axisymmetric convergent-divergent nozzle for use in the calibration of supersonic probes. However, I'm having great difficulty in finding any program that will generate the contour of the nozzle using the method of characteristics.

I have found code written in Fortran for the 2-D solution but not axisymmetric. Acoustic radiation from axisymmetric ducts - A comparison of theory and experiment Noise characteristics of coannular flows with conventional and inverted velocity profiles.

Scale model performance test investigation of exhaust system mixers for. Journal of Fluid Mechanics the axisymmetric mode, particularly at the peak Strouhal number. The axisymmetric mode of the acoustic field can be clearly associated with an axially non-compact to low-Mach-number jets with laminar boundary layers at the nozzle exit, as.

nozzle is drawn as shown. Fig. 1: 2-D Nozzle. Multi Jets • Two nozzle with divergence angle 5. is taken and kept at centre to centre distance metres between the nozzle. • The distance between the nozzle is taken with reference to c/d ratio =from the paper ”CFD Analysis of Twin Jet Supersonic Flow with Fluent Software”.

axisymmetric forms given the best performances compared to 2D gemetry []. The Minimum Length Nozzle (MLN) is currently used as a nozzle giving better performance compared to other categories.

In addition the simplicity of its construction []. We focus Mohamed Boun-jad, Department of Mechanical Engineering, Faculty. Supersonic gas-solid particle flow in an axisymmetric nozzle (Technical note) [Johnson, G. R] on *FREE* shipping on qualifying offers.

Supersonic gas-solid particle flow in an axisymmetric nozzle (Technical note)Author: G. R Johnson. Experimental and numerical investigation of an axisymmetric freejet K B S N Viswanath & V Ganesan from a nozzle, jet emanating from an orifice, jet axisymmetric jet, however, as the jet spreads rings and vortices are stretched.

Accordingly, this causes. nozzle axis is given in Fig. The nozzle performance characteristics of the axisymmetric nozzle are also very close (see Table 2). 50 5E-OS Y, m Figure 3: Axial velocity profile at the throat of the axisymmetric nozzle.

The constant critical throat condition is therefore used to as the boundary conditions Cited by: Figure 2: Typical performance curves for an ejector of fixed geometry and constant secondary fluid inlet conditions. Ejector performance is closely related to its geometry (Milazzo et al., ).

Huang et al., () found that the optimal area ratio (Ar) for single phase ejectors lies in the range 7 Author: Sergio Croquer, Sébastien Poncet, Nicolas Galanis.

UTILIZING AXISYMMETRIC FLOW WITH APPLICATION TO A NOZZLE OF SQUARE TEST SECTION By IVan E. Beckwith, Herbert W. Ridyard, and Nancy Cromer SUMMARY A method is given for the design of three-dimensional nozzles uti-lizing axisymmetric flow.

The nozzle can be designed to produce uniform flow in a test chamber of arbitrary cross section. The method Cited by: Axisymmetric Stress Analysis of Internally Pressurized Rotating Cylinder using Finite Element Method A Project Report Submitted in partial fulfillment for the award of the degree Of BACHELOR OF TECHNOLOGY IN MECHANICAL ENGINEERING By Bhagat Meghraj Vitthal () Under the guidance of Prof.

Kavi. One dimensional and axisymmetric numerical simulation of a single-stage gas gun is being conducted in this study. Axisymmetric viscous and compressible flow equations has been numerically solved by van Leer flux vector splitting scheme, with space and time second order accuracy by Cited by: 1.

Axisymmetric nozzle of minimum length, using the method of characteristics, by expanding a flow of air until to the required Mach Number. A thorough understanding of the method of characteristics and its application to the design of a Ducted Axisymmetric nozzle is required. We make use of the compatibility equations involved.From Introduction: "A method for the design of three-dimensional nozzles based on axi-symmetric flow is presented in this paper.

The design method presented in this paper is general; however, as an illustrative example of the design of a Mach number 10 nozzle with square test section is included."Cited by: Six coannular plug nozzle configurations having inverted velocity and temperature profiles, and a baseline convergent conical nozzle were tested for simulated flight acoustic evaluation in General Electric's Anechoic Free-Jet Acoustic Facility.

The model nozzle configurations, acoustic test conditions, and detailed test results from the hot.