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Tuesday, May 5, 2020 | History

3 edition of Aircraft excrescence drag found in the catalog.

Aircraft excrescence drag

A. D. Young

Aircraft excrescence drag

by A. D. Young

  • 155 Want to read
  • 1 Currently reading

Published by AGARD in Neuilly sur Seine .
Written in English


Edition Notes

"... prepared at the request of the Fluid Dynamics Panel of AGARD".

Statementby A.D. Young and J.H. Paterson ; edited by J. Lloyd Jones
SeriesAGARDograph / AGARD -- 264, AGARD-AG-264
ContributionsPaterson, J. H., Jones, J. Lloyd., Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel.
The Physical Object
FormatMicrofiche
Pagination2 microfiche
ID Numbers
Open LibraryOL13783390M

This book offers a commanding overview of the technological advances in prediction and verification of the thrust and drag of aircraft in flight. It treats determination of the difference between installed thrust and drag of an aircraft and how it is complicated by interaction between inlet airflow and flow over the boattail and other Format: Hardcover. Aerodynamic Forces. Lift and Drag. Aerospace Engineering Project Lead The Way, Inc. Lift Equation Lift Coefficient of Lift, Cl Determined experimentally Combines several factors Direction of Flight Shape Angle of attack = 2 = = = 2 2 Alternate format = 3 = = = Applying the Lift Equation The Cessna from Activity step #2 takes off successfully from Denver, CO during an average day.

Gaudet, L. and Winter K.G., Measurements of the drag of some characteristic aircraft excrescences immersed in turbulent boundary layers. RAE Tech Memo Cited by:   Theory and Practice of Aircraft Performance Methodology Semi Empirical Relations to Estimate Aircraft Component Parasite Drag Notes on Excrescence Drag Resulting from Surface Imperfections Minimum Parasite Drag CDp Estimation Subsonic Wave Drag Total Aircraft Drag Low Speed.

Chapter 6 Drag and Propulsion (pages –): Chapter 7 Lift and Airfoils in 2D at Subsonic Speeds (pages –): Chapter 8 Lift and Wings in 3D at Subsonic Speeds (pages –): Chapter 9 Theoretical Idealizations Revisited (pages –). Notes on Excrescence Drag Resulting from Surface Imperfections Minimum Parasite Drag CDp Estimation Subsonic Wave Drag Total Aircraft Drag Low-Speed Aircraft Drag at Takeoff and Landing Propeller-Driven Aircraft Drag Military Aircraft Drag Supersonic Drag


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Aircraft excrescence drag by A. D. Young Download PDF EPUB FB2

Excrescences placed at the location of the shock wave caused a significant reduced in the overall drag coefficient and the interaction between the shock and the excrescence placed upstream of the shock could lead to either a decrease or increase in wave drag depending on its location.

Read more Read less The Amazon Book ReviewAuthor: Sanassee Laksham. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

types of excrescence are presented. The practical problems of applying these data in the varying velocity gradients existing on aircraft surfaces are treated and one section is devoted to the drag of auxiliary air and exit openings.

Gaps in existing data which offer opportunities for researchCited by:   Aircraft excrescence drag by A. Young. Published by AGARD in Neuilly sur Seine.

Written in English. Get this from a library. Aircraft excrescence drag. [A D Young; J H Paterson; J Lloyd Jones; North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development.]. Reference is made to ESDU in which the excrescence drag of the wing of a subsonic transport aircraft Aircraft excrescence drag book the cruise condition is considered as a detailed set of examples in which the data from a number of Data Items are utilised.

Aircraft Excrescence Drag - Free ebook download as PDF File .pdf), Text File .txt) or read book online for free.

Journal of Aircraft; Journal of Guidance, Control, and Dynamics; Journal of Propulsion and Power; Journal of Spacecraft and Rockets; Journal of Thermophysics and Heat Transfer; Browse All Journals; Browse All Virtual Collections; Books.

AIAA Education Series; Library of Flight; Progress in Astronautics and Aeronautics; The Aerospace Press; Browse All Books. The drag parameter is plotted against wetted area for complete airframes but, for a more detailed estimate, values for some categories of excrescence are also given graphically.

Abstract Items that disturb the otherwise smooth flow of the air over the surface of an airplane create excrescence drag. For general aviation airplanes, the relative scale of the disturbance to.

In this book, excrescence drag is addressed separately as two types: [16] 2. Excrescence drag due to surface-roughness drag is accounted for by using 2 to 3% of component parasite drag as roughness drag ([1] and [7]). As indicated in dis­cussion after Equationit is factored using 3% after computing all component parasite drag, as follows.

Gaudet, L. and Winter, K. Measurement of the drag of some characteristic aircraft experescences immersed in turbu lent boundary layers.

RAE Technical Memorandum Aero, also AGARD CP, proceedings of AGARD Confer ence on Aerodynamic Drag, Turkey, The state-of-the-art in aircraft drag prediction was defined as of by the AGARD conference entitled "Aerodynamic Drag."'20 This chapter draws heavily on that work and attempts to update, to the extent possible, those portions relevant to aircraft drag prediction Cited by: 4.

Turbulent roughness drag due to surface waviness at low roughness Reynolds numbers Journal of Aircraft, Vol. 21, No. 12 Flight test measurement of exterior turbulent boundary layer pressure fluctuations on Boeing model airplaneCited by: Notes on Excrescence Drag Resulting from Surface Imperfections Minimum Parasite Drag ΔC Dp Estimation Subsonic Wave Drag Total Aircraft Drag Low-Speed Aircraft Drag at Takeoff and Landing Propeller-Driven Aircraft Drag Military Aircraft Drag Our aircraft consists of a number of major components which each contribute to the total drag produced: wing, fuselage, empennage (horizontal and vertical tail) and canopy.

Larger aircraft could also have engine nacelles, external stores, fairings or antennae that should also be included in the drag calculation. Aircraft Drag Estimation Methodology Minimum Parasite Drag Estimation Methodology Semi‐Empirical Relations to Estimate Aircraft Component Parasite Drag Notes on Excrescence Drag Resulting from Surface Imperfections Minimum Parasite Drag ΔCDp Estimation Subsonic Wave Drag Aircraft Drag Reduction-A Review Article in Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering (1) February with Reads How we measure 'reads'Author: Dennis M.

Bushnell. It involves estimating aircraft weight and drag and computing the available thrust from the engine. The methodology shown here includes formal sizing of the aircraft, engine matching, and substantiating performance to comply with the customer's demands and government regulatory standards.

Aircraft propulsion 2. Taking advantage of moving within a fluid, aircraft propulsion is achieved by air-breathing engines, i.e. engines that take a stream of air and throw it at higher speed backwards. The energy source is the combustion of a fuel (carried onboard) with oxygen in the air, but it might also be solar power or nuclear Size: 1MB.

Excrescence drag arising out of these ‘aerodynamic’ defects is assessed by using CFD and semi-empirical methods. Cost versus tolerance relationships are established through in-house methods using industrial data. The aircraft unit price typically contributes from two to four times more than the fuel burn to aircraft direct operating by: In most cases a datum drag parameter is presented at the troposphere and a Mach number of ; a correction factor to other altitudes and speeds whose derivation is included is based on a detailed study of the variation of excrescence drag with Reynolds and Mach numbers.The lateral shear layer thicknesses for model 1 in the three boundary layers, in planes at heights of Z/D= and above the wall, are shown in Figs.4 and 5 respectively.

The thicknesses at X/D= are almost identical to those in the vertical plane on the longitudinal centre-line indicating that the thickness in the initial region is similar around the entire curved shear by: