Last edited by Zuluzil
Saturday, August 1, 2020 | History

1 edition of A numerical investigation of flow separation on a three-caliber tangent ogive found in the catalog.

A numerical investigation of flow separation on a three-caliber tangent ogive

by Leslie Anne Yates

  • 15 Want to read
  • 24 Currently reading

Published .
Written in English

    Subjects:
  • Viscous flow,
  • Projectile points,
  • Fluid dynamics

  • Edition Notes

    Statementby Leslie Anne Yates
    The Physical Object
    Paginationvi, 108 leaves :
    Number of Pages108
    ID Numbers
    Open LibraryOL25924879M
    OCLC/WorldCa16618799

    Reynolds number (Re) effects on low-speed vortical flows over caliber, tangent-ogive cylinders at two angles of attack (α = 20 and 30 deg) are computationally assessed for ReD = million   2. Intermann, G.A., “Experimental Investigation of the location and Mechanism of Local Flow Separation on a 3-Caliber Tangent Ogive Cylinder at Moderate Angles of Attack,” M.S. Thesis, Universith of Florida, Gainesville, FL. ://

    The flow over a rocket may result in plume induced flow separation (PIFS) depending on flight conditions and nozzle-to-ambient pressure ratios. a tangent ogive, and the new nose shape The reasons for the difficulty in simulating accurately strong 3-D shock wave/turbulent boundary layer interactions (SBLIs) and high-alpha flows with classical turbulence models are investigated. These flows are characterized by the appearance of strong crossflow separation. In view of recent additional evidence, a previously published flow analysis, which attributes the poor performance of

      -- "2 Laminar solutions for asymmetric vortical flow on a five caliber tangent ogive with an eight caliber cylindrical afterbody were calculated with a thin-layer Navier-Stokes code on a one block algebraic grid. Solutions were obtained for Mach at 25, 30, , , and 40_degeesanglet of :// The numerical technique used is an implicit, finite difference scheme. 3D numerical computations have been made for a generic missile configuration at Mach number = and at 14° angle of attack. The model consists of a 3-caliber ogive and a caliber cylindrical after ://


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A numerical investigation of flow separation on a three-caliber tangent ogive by Leslie Anne Yates Download PDF EPUB FB2

Numerical investigation of crossflow separation on a three-caliber tangent ogive cylinder Yates, Leslie A. AIAAJY Keywords: Computational Fluid Dynamics; Cross Flow; Laminar Flow; Numerical Flow Visualization; Ogives; Separated Flow; Bodies Of Revolution; Flow Velocity; Navier-Stokes Equation; Skin Friction; A numerical investigation of crossflow separation on a three-caliber tangent ogive-cylinder.

skin-friction, vorticity, or flow-angle distributions that indicated where separation occurred. Instead, crossflow separation developed gradually and involved an extended region of the surface Numerical investigation of crossflow separation on a three-caliber tangent ogive cylinder.

By Gary T. Chapman and Leslie A. Yates. Topics: FLUID MECHANICS AND HEAT TRANSFER. Year: OAI identifier: oai: Provided by: NASA   Investigation of an excited jet diffusion flame at elevated pressure 26 April | Journal of Fluid Mechanics, Vol.

Numerical investigation of crossflow separation on a three-caliber tangent ogive An experimental study of the flowfield around a three-caliber tangent ogive-cylinder body in a supersonic flow has been made to provide a consistent description of the :// A numerical study is reported on the flow over a backward-facing step.

The turbulence model employed is a hybrid model of Boussinesq viscosity and Reynolds-stress turbulence closure in which all   This body of work documents three experimental investigations into the unsteadiness of the flow over a caliber tangent-ogive cylinder at high angles of incidence.

The goal of the investigations is to characterize the natural and forced flow unsteadiness, using a variety of experimental ://   Flow separation was investigated first in the special case of two-dimensional steady flow.

In fact, in the very first paper published on boundary-layer theory, Prandtl included a discussion of separation and the corresponding mathematical criterion. Separation over a circular cylinder has attracted hundreds of researchers who produced a literally endless list of :// This banner text can have markup.

web; books; video; audio; software; images; Toggle Observations are presented of various types of limited cavitation on cm diameter Schiebe, hemispherical, and DTNSRDC noses. These three noses were selected to give various flow states over the range of test speeds – m/s ranging from laminar separation for all speeds (hemispherical nose) to nonseparated flow for all speeds (Schiebe nose) with the DTNSRDC nose experiencing both Flow over Tangent-Ogive Forebody NVith the same numerical scheme discussed above and a modified turbulent model the flow over a caliber tangent- ogive forebody was studied (21) at angles of attack of 20° and 30° and at Reynolds Lumbers in the range - x   In the past, a large number of experiments, theoretical and numerical analysis were carried out on the flow field of gun launched in air.

Based on ALE equations and AUSMDV scheme, calculations with chimera grids and dynamic grid technology were carried out to explore the interaction between the projectile and the muzzle flow field of mm rifle.

1,2 ://    An Experimental Study of the Effects of Aft Blowing on a Caliber Tangent Ogive Body at High Angles of Attack N. Chokani and N. Gittner 91 A Numerical and Experimental Study of Tangential Jet Blowing Applied to Bodies at High Angles of Attack G. Font, Z. Celik and L. Roberts Forebody Vortex Control Using Slot Abstract.

The subject of the present work is the investigation of the Magnus effect in the supersonic flow regime by means of 3-D Reynolds-Averaged Navier-Stokes simulations on a generic diameter long tangential-ogive-cylinder type projectile especially for high angles of :// The Navier-Stokes equations are capable as well to calculate the effects of viscosity on the flow fields, including the effects of three-dimensional separations.

It is expected that the Navier-Stokes formulation is capable of capturing the vortical structures, such as the rolled-up vortices and the three-dimensional separating vortex sheets   Aa experimental investigation of the effec:s of aft biowin 8 on the asymmetric vortex flow of a slender, etric body at high angles of attack has been conducted.

A caliber tangent ogive body fitted with a dy was tested in a wind tunnei under subsonic, luainar flow   Investigation on asymmetric flow over a blunt-nose slender body at high angle of attack. Numerical algorithm comparison for the accurate and efficient computation of high-incidence vortical flow.

Temporal evolution of the flowfield over a pitching tangent ogive :// The simulations provided a profound insight into the flow structure and revealed a shift of the cross-flow separation lines as a consequence of the spin. This was shown to be the primary source of the Magnus side force for the higher angles of attack in the investigated :// /Investigation-of-the-Magnus-Effect-of-a-Generic.

Numerical Investigation of Localized Separation Induced by a Three-Dimensional Pressure Gradient. Robert Jacobi Numerical Investigation of Flow Transition Caused by the Interaction of Oblique Shocks and Supersonic Boundary Layers A Computational Study on The Effect of Asymmetric Laminar-Turbulent Transition Conditions on a Tangent-Ogive   A combined computational and experimental analysis was performed on a tangent ogive body with very low aspect ratio wings in the ‘+’ (plus) orientation at Mach numbersandwith the aim of developing a database of global force and moment ://.

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