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Sunday, May 10, 2020 | History

2 edition of Fluctuating loads measured on an over-the-wing supersonic jet model found in the catalog.

Fluctuating loads measured on an over-the-wing supersonic jet model

Conrad M. Willis

Fluctuating loads measured on an over-the-wing supersonic jet model

by Conrad M. Willis

  • 233 Want to read
  • 11 Currently reading

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

    Subjects:
  • Airplanes -- Wings.,
  • Aerodynamic load.,
  • Aerodynamics, Supersonic.

  • Edition Notes

    StatementConrad M. Willis, Langley Research Center.
    SeriesNASA technical paper ; 1366, NASA technical paper -- 1366.
    ContributionsLangley Research Center., United States. National Aeronautics and Space Administration. Scientific and Technical Information Office.
    The Physical Object
    Pagination38 p. :
    Number of Pages38
    ID Numbers
    Open LibraryOL17648896M

    The divergent air that flows up and over the wing now pushes the tab upward to close the switch and complete the circuit to the horn or light. [Figure ] A true AOA indicating system detects the local AOA of the aircraft and displays the information on a cockpit indicator. The scaling parameters are defined as: (i>- m. V. J.= — l_J_n = (3) 2q S and ref m. i!>4 V T I/O o V 'oo ^cj j Q where m. = Jet mass flow rate m = Freestream mass flow rate 00 V. = Exit velocity ~ meters/sec - = Dynamic pressure ~ H/m^ e. = Nozzle half-angle at exit n = Number of thrusters S - = Reference area ( m^) In.

    A Heat Transfer text book by John H. Lienhard IV and John H. Lienhard V Instrumentation and Metrology Whatever exists, exist in some amount. finding this amount is what is called as measurement. Measurement is the act or process that consist of obtaining a quantitative comparison between a standard entity and measure entity. Clearly, various flow and noise control technologies are suitable for minor systems; however, this section will focus primarily on the major platforms and the issues associated with introducing flow and noise control systems into these platforms. To close this section, a brief discussion of Cited by:

    Broadband shock associated noise from supersonic jets measured by a ground observer. AIAA Journal, 30, Tam, C. K. (). Supersonic jet noise generated by large scale disturbances. Modelling Shock Oscillations in High Speed Wall Jets. Delivered at Workshop on Fluctuating Pressure Loads Research, NASA Langley Research Center. Computational fluid dynamics (CFD) is a large branch of scientific computing that lately has undergone explosive growth. It draws upon elements from related disciplines: fluid mechanics, numerical analysis, theory of partial differential equations, computer science, and computational by:


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Fluctuating loads measured on an over-the-wing supersonic jet model by Conrad M. Willis Download PDF EPUB FB2

Fluctuating pressure loads on the wing and flap of an over-the-wing supersonic jet model were measured. The model was tested statically and at a Mach number of in a small free jet to simulate forward speed. Test parameters were impingement angle, nozzle height, and flap deflection.

Load levels as high as db were measured at the center of the impingement region during static : C. Willis. Fluctuating loads measured on an over-the-wing supersonic jet model.

[Washington]: National Aeronautics and Space Administration, Scientific and Technical Information Office ; Springfield, Va.: For sale by the National Technical Information Service, Conrad M Willis has written: 'Fluctuating loads measured on an over-the-wing supersonic jet model' -- subject(s): Aerodynamic load, Aerodynamics, Supersonic, Airplanes, Supersonic Aerodynamics.

What is a supersonic airplane. Wiki User An aircraft that flies faster than Mach 1- or about miles an. hour at sea level. Related Questions. Asked in Airplanes and Aircraft.

Fluctuating loads measured on an over-the-wing supersonic jet model / ([Washington]: National Aeronautics and Space Administration, Scientific and Technical Information Office ; Springfield, Va.: For sale by the National Technical Information Service, ), by Conrad M.

Willis, United States. Supersonic diffusers. See also what's at your library, or elsewhere. Broader term: Aerodynamics, Supersonic; Filed under: Supersonic diffusers Performance of a short annular dump diffuser using suction-stabilized vortices at inlet Mach numbers to / (Washington: National Aeronautics and Space Administration, Scientific and Technical Information Office ; Springfield, Va.

Full text of "Monthly catalog of United States government publications" See other formats. Steady/unsteady aerodynamic analysis of wings at subsonic, sonic and supersonic Mach numbers using a 3D panel method Article in International Journal for Numerical Methods in Fluids 42(10) Supersonic aircraft are pointed at the front end in order to minimize the region of the strong shock, resulting effectively in an attached shock.

The steeper the shock angle for a given flow speed, the higher the losses are. Only in hypersonic vehicles are blunt noses used on purpose, but nor for braking but for limiting local heat loads. American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA AOE Aircraft Performance Problem Sheet 2 (ans) 6.

The atmosphere of Jupiter is essentially made up of hydrogen, H2. For Hydrogen, the specific gas constant is Joules/(kg)(K). The acceleration of gravity of Jupiter is m/s2. Assuming an isothermal (constant temperature) atmosphere with a temperature of K, and assuming thatFile Size: KB.

An experimental study on a passive, self-suction, and self-jet control method was conducted to manipulate the flow around a circular cylinder at the Reynolds number R≈× carrying loads, as the loads are distributed over the wing.

If these loads are passengers, as distinct from cargo (or fuel in a tanker), then the minimum thickness of the wing is set by the need for aisles for the passengers. The chord of the wing is then set by the maximum thick-ness-to-chord ratio achievable with an airfoil design that. Ask an Explainer.

Q: How are swept-back wings vs straight wings effected by aerodynamics and is one model superior to the other in any situation. A: Bernoulli’s principle tells us that airflow over the top of a wing is faster than below.

If an aircraft is moving fast enough this faster airflow can become supersonic which makes the air flow. What happens if the wing of a supersonic plane goes into the shock wave from the nose.

A plane have this shock wave at the nose going back at an angle, but it also have shock waves going back (in the same angle) from the intake or the joint between the wing and the body, shocks that do go over the wing.

The vortex action maintains a smooth airflow over the wing surface well past the normal stall point at which the airflow would otherwise break up, thus sustaining lift at very high angles. LERX were first used on the Northrop F-5 "Freedom fighter" which flew in ,[1] and have since become commonplace on many combat aircraft.

A Comparison of Wing Pressure Distributions Measured in Flight and on a Windtunnel Model of the Super VC. 1 O By Miss G. BROWNE, T. measurements in flight over the wing of a Super VC and correspondingly, for a 1/15 scale half-model tested in the A.R.A.

9 ft x 8 ft transonic tunnel at a Reynolds number of x 10 6. At Supersonic Speeds, aerodynamics change again, and create shockwaves that have to be controled by the shape of the leading edge, thickness, sweep of the wing and shape of the fuselage. The placement of the shockwave has to be controled, and the airflow after the shockwave is actually traveling at subsonic speeds to create lift.

The force which imparts a change in the velocity of a mass. This force is measured in pounds but has no element of time or rate. The term, thrust required, is generally associated with jet engines. A forward force which propels the airplane through the air.

Flying Almost Supersonic Means The Air's Going Supersonic. You know that the air accelerates as it travels over the top of a wing - it's a basic part of Bernoulli's lift.

So, if you're flying near the speed of sound - say Mach.8, the air flowing over the wing could speed up. A History of Suction-T ype Laminar-Flow Control Supersonic Laminar-Flow Control: FXL data measured on a small wind-tunnel model.

When engineers select the distance from the component’s leading edge to the end of laminar flow as the representative length, theFile Size: 2MB.The tail-mounted engine aircraft’s wing is easier to design.

The wing is the most critical, and expensive component of any aircraft, and the rear mounted engine simplifies the wing design. The DC9 through MD80 series is a good example.

It was desi.what is the highest speed possible without supersonic flow over the wing. critical mach number. what is the free stream mach number which produces first evidence of local sonic flow.

You are on takeoff roll in a 14 CFR Part 25 jet and see an engine fire warning light as you see V1 pass.