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Sunday, July 12, 2020 | History

3 edition of Low-speed aerodynamic test of an axisymmetric supersonic inlet with variable cowl slot found in the catalog.

Low-speed aerodynamic test of an axisymmetric supersonic inlet with variable cowl slot

A. G. Powell

Low-speed aerodynamic test of an axisymmetric supersonic inlet with variable cowl slot

by A. G. Powell

  • 250 Want to read
  • 19 Currently reading

Published by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va .
Written in English

    Subjects:
  • Airplanes -- Jet propulsion -- Air intakes.

  • Edition Notes

    Other titlesLow speed aerodynamic test of an axisymmetric supersonic inlet with variable cowl slot.
    StatementA.G. Powell and H.R. Welge and C.J. Trefny.
    SeriesNASA technical memorandum -- 87039.
    ContributionsWelge, H. R., Trefny, Charles J., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18031700M

    Design and Development of the Blackbird: Challenges and Lessons Learned Peter W. Merlin* TYBRIN Corporation, NASA Dryden Flight Research Center, Edwards, California, The Lockheed Blackbirds hold a unique place in the development of aeronautics. In their day, the A, YF, M, D, and SR variants outperformed all other jet airplanes. The design and analysis of external-compression supersonic inlets has been a topic of research and development for over 60 years. Ferri and Nucci provided some of the earliest design guidelines for the angles and placements of the centerbody cone and cowl for an axisymmetric inlet (Ref. 7).

    Aerodynamics, from Greek ἀήρ aero (air) + δυναμική (dynamics), is the study of motion of air, particularly as interaction with a solid object, such as an airplane wing. It is a sub-field of fluid dynamics and gas dynamics, and many aspects of aerodynamics theory are common to these term aerodynamics is often used synonymously with gas dynamics, the difference being that.   Unlike subsonic aircraft, such as the Boeing , which have been studied and tested since the s, supersonic aircraft offer engineers the opportunity to explore options to achieve optimum design. As a result, Boom engineers have more trade space—more opportunities to evaluate, test and improve aerodynamics.

    ISBN: OCLC Number: Description: xxiii, pages: illustrations ; 25 cm: Contents: Chapter 1 Aerodynamic Factors in Design: Introduction, Mass flow and pressure recovery, Intake types, The boundary layer problem, The problem of matching, Engine compatibility, Variable geometry, Intake drag, References; Chapter 2 Intake-Engine Compatibility: . Figure 1. Schematic of supersonic wind tunnel A. Inlet Adapter Plates The first step in the design process was to create an inlet adapter system that would capture the flow from the nozzle into the test section with a minimum of interference or distortion at a desired Mach number, in .


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Low-speed aerodynamic test of an axisymmetric supersonic inlet with variable cowl slot by A. G. Powell Download PDF EPUB FB2

The experimental low-speed aerodynamic characteristics of an axi-symmetric mixed-compression supersonic inlet with variable cowl slot are described. The model consisted of the NASA P-inlet center-body and redesigned cowl with variable cowl slot powered by the JT8D single-stage fan simulator and driven by an air turbine.

The. Get this from a library. Low-speed aerodynamic test of an axisymmetric supersonic inlet with variable cowl slot. [A G Powell; H R Welge; Charles J Trefny; United States. National Aeronautics and Space Administration.]. The experimental low-speed aerodynamic characteristics of an axisymmetric mixed-compression supersonic inlet with variable cowl slot are described.

The model consisted of the NASA P-inlet centerbody and redesigned cowl with variable cowl slot powered by the JT8D single-stage fan simulator and driven by an air : C. Trefny, H. Welge and A. Powell. American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA Cited by: 7.

The experimental low-speed aerodynamic characteristics of an axisymmetric mixed-compression supersonic inlet with variable cowl slot are described.

This paper describes the inlet model, the SWT test, and the axisymmetric CFD analysis. The results of the analysis are compared to the experimental data to validate the predictions, to answer the previous questions, and to explain the operation of the dual-stream inlet in more detail.

Dual-Stream Low-Boom Supersonic Inlet. Prediction of the steady three-dimensional aerodynamics of a supersonic ramjet missile. Low-speed aerodynamic test of an axisymmetric supersonic inlet with variable cowl slot. Axisymmetric thrust reversing thrust vectoring exhaust system for maneuver and balanced field length aircraft.

An experimental study was conducted to investigate the phenomenon of supersonic inlet buzz on axisymmetric, external-compression inlet. An inlet model with a cowl. New Predictive Filters for Compensating the Transport Delay on a Flight Simulator Low-speed aerodynamic test of an axisymmetric supersonic inlet with variable cowl slot.

Tactical aircraft typically spend most of their life at subsonic conditions. For instance, based on historical usage data, the F‐16 exceeds Mach 1 less than 1% percent of flight time.

Subsonic inlet aerodynamic design is driven primarily by duct losses, form and spillage drag, and cowl lip separation at static or takeoff by: 1.

Low-speed aerodynamics is important in the design and operation of aircraft flying at low Mach number, and ground and marine vehicles. This book offers a modern treatment of the subject, both the theory of inviscid, incompressible, and irrotational aerodynamics and the computational techniques now available to solve complex : Joseph Katz, Allen Plotkin.

In order to improve the off-design aerodynamic performance of supersonic inlet, a two-dimensional variable geometry inlet with the free stream Mach number from was designed. ROLE OF CFD IN THE AERODYNAMIC DESIGN AND ANALYSIS OF THE PARAMETRIC INLET with various cowl and slot geometries.

fluid dynamics simulations of supersonic inlet flows has. The ONERA activities concerning the aerodynamics of the future supersonic transport aircraft are reviewed. Section 1 is devoted to the performance prediction and detailed comparisons between CFD and wind-tunnel data are presented and discussed.

Section 2 addresses the problem of the drag prediction in cruise flight conditions from wind-tunnel data. Skin friction coefficients values measured Cited by: 9. The design includes a low-speed inlet designed for operation to Mach 4 and a high-speed Mach 7 inlet.

Both low-speed and high-speed inlets have variable geometry (rotating) cowl lip sections, and the low-speed inlet has a variable geometry ramp.

The Mach 7 inlet was designed to. Practical Intake Aerodynamic Design by Mr EL Goldsmith,available at Book Depository with free delivery worldwide.

Practical Intake Aerodynamic Design: Mr EL Goldsmith: We use cookies to give you the best possible experience. Mach number contours for supersonic axisymmetric nozzle jet flow. Flow Description. This case involves a "submerged" turbulent supersonic jet emanating from an axisymmetric convergent-divergent Mach nozzle.

This nozzle was studied by J.M. Eggers in Velocity profiles and eddy viscosity distributions were obtained within the jet. W.H. Mason Supersonic Aerodynamics 7/31/16 The best paper to read on the B is by Erickson.1 The airplane had a poor safety record.

In part this was because the tires were very small to allow the gear to fit in the fuselage. Title: Aerodynamics of axisymmetric bodies in supersonic flow with local blowing: Authors: Antonov, V.

A.; Grishin, A. Publication: Journal of Applied Mechanics. Full text of "NASA Technical Reports Server (NTRS) Bibliography of Lewis Research Center technical publications announced in " See other formats.

Lessons Learned in the High-Speed Aerodynamic Research Programs of the NACA/NASA M. Leroy Spearman* NASA Langley Research Center Hampton, Virginia I. Abstract The achievement of flight with manned, powered, heavier-than-air aircraft in marked the beginning of a new era in the means of Size: 62KB.

Compressibility Effects Importance of the Speed of Sound Realms of Flight Supersonic Flow Patterns V. High Speed Aerodynamics High Speed Airfoils Critical Mac.The cowling lower surface, on the other hand, is inclined into the flow with an angle determined by the nozzle-cowl-wall geometry (fig.

5). Changes in this nozzle-cowl-wall geometry thus necessarily involve changes in exterior-cowl aerodynamic forces, which were accounted for .