Surface pressure fluctuations near an axisymmetric stagnation point

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U.S. National Bureau of Standards, For sale by the Supt. of Docs., U.S. Govt. Print. Off. , Washington
Turbulence, Pressure -- Measur
StatementRichard D. Marshall
SeriesNBS technical note -- 563
The Physical Object
Paginationviii, 61 p. :
ID Numbers
Open LibraryOL15472219M

Additional Physical Format: Online version: Marshall, Richard D.

Details Surface pressure fluctuations near an axisymmetric stagnation point PDF

Surface pressure fluctuations near an axisymmetric stagnation point. Washington: U.S. National. Axisymmetric stagnation-point flow over a lubricated surface Article (PDF Available) in Acta Mechanica (1) November with Reads How we measure 'reads'.

Description Surface pressure fluctuations near an axisymmetric stagnation point EPUB

Explicit solution of axisymmetric stagnation flow construct the approximate solutions for the governing equations. In Section 4, we explain about Padé approximation. Section 5 contains the results and discussion. The conclusions are summarized in Section 6.

2 Mathematical formulation. Example The shoreline near the west end of a small lake resembles a hydrodynamic half-body. The lake may be assumed to have a uniform depth equal to outfall diffuser made of a perforated vertical pipe is located 10 m from the west shore and equidistantly to the north and south shores.

The diffuser can be assumed to operate as an ideal line source discharging uniformly m 3. Introduction. Axisymmetric stagnation point flow on a flat surface was first studied by variations on that problem have been studied including the effects of wall stretching and suction and blowing through a porous wall; see the review by Wang.

A relatively new axisymmetric stagnation-point flow was discovered by contrast to the irrotational outer flow of Homann Cited by: 6. Dual solutions for axisymmetric stagnation point flow over a lubricated surface Article in Communications in Applied Analysis 12(3) July with 24 Reads How we measure 'reads'.

Axisymmetric stagnation-point flow is considered.

Download Surface pressure fluctuations near an axisymmetric stagnation point FB2

A Newtonian fluid impinges orthogonally on a plane surface lubricated by a thin non-Newtonian liquid film of variable thickness.

A slip-flow boundary condition is deduced, which allows for partial slip at the by: near a stagnation point towards a non-linear stretching surface. Nazar [12] studied the unsteady mixed et al. convection boundary layer flow near the stagnation point on a vertical surface in a porous medium.

Priede et al. [13] matched asymptotic solution for the solute boundary layer in a converging axisymmetric stagnation point flow. Ayub et al. Get this from a library. Surface pressure fluctuations due to an impinging underexpanded supersonic jet.

[Binu Pundir] -- The impingement of supersonic jets on surfaces is of interest because of its important application to jet blast deflectors (JBD), and short takeoff and.

HOSTED BY ORIGINAL ARTICLE Axisymmetric stagnation-point flow over a stretching/shrinking plate with second-order velocity slip S.K. Soida,b, S. Awang Kechila, A.

Ishakb,n aFaculty of Computer and Mathematical Sciences, Universiti Teknologi MARA, UiTM, Shah Alam, Selangor, Malaysia bSchool of Mathematical Sciences, Faculty of Science and Technology, Universiti Kebangsaan. The results of an analytical and experimental investigation of heat transfer in the vicinity of the stagnation point of a disk arranged normal to the flow and washed by Cited by: Pressure Jluctuations in turbulent boundary layers S S* H II cr Re; U,s (ft ) (in.) (in.) V x 10" TABLE l values for boundary-layer properties.

the curve for 35" shows the influence of the wing and the 75" curve shows the influence of the main landing wheel. The measurement location was selected at " down fromCited by:   The only exception is the study of three-dimensional stagnation-point flow on a flat plate by Howarth (, “The Boundary Layer in Three-Dimensional Flow—Part II: The Flow Near Stagnation Point,” Philos.

Mag., 42, pp. –), which is based on boundary layer theory approximation and zero pressure assumption in direction of normal Cited by: Alin V. Roşca, Natalia C. Roşca and Ioan Pop, Axisymmetric stagnation point flow and heat transfer towards a permeable moving flat plate with surface slip condition, Applied Mathematics and.

Figure stress components in plane axisymmetric problems Plane Stress and Plane Strain Two cases arise with plane axisymmetric problems: in the plane stress problem, the feature is very thin and unloaded on its larger free-surfaces, for example a thin disk under external pressure, as shown in File Size: KB.

Figure 7a indicates the surface pressure coefficient is largest at the stagnation point of the head of the axisymmetric body; it gradually decreases to a negative pressure along the curved surface of the head and then quickly returns to a positive pressure; this area is the transition region of the axisymmetric body.

In this area, the pressure Author: Chunlong Huang, Kunde Yang, Hui Li, Yukun Zhang. Hi everyone, I'm a beginner at Fluent so I have a very very simple question: I'd like to know how the pressure surface integral is computed in the pressure surface integral in an axisymmetric problem -- CFD Online Discussion Forums.

In this paper, we have presented the axisymmetric stagnation flow of a micropolar fluid in a moving cylinder. The governing equations of motion, microrotation and energy are simplified with the help of suitable similarity transformations. System of six nonlinear coupled differential equations has been solved analytically with the help of strong analytical tool known as homotopy analysis : Abdul Rehman, Saleem Iqbal, Syed Mohsin Raza.

Surface Tension-The stagnation-zone characteristics of an impinging liquid jet are of great interest because the maximum heat transfer coefficient occurs in that region. This paper is an analytical study of the fluid flow and heat transfer in the stagnation zone of an unsubmerged liquid jet.

The role of surface tension is emphasized. Stagnation File Size: KB. In this paper, we have presented the axisymmetric stagnation flow of a micropolar fluid in a moving cylinder. The governing equations of motion, microrotation and energy are simplified with the help of suitable similarity transformations.

System of six nonlinear coupled differential equations has been solved analytically with the help of strong analytical tool known as homotopy analysis : Abdul Rehman, Saleem Iqbal, Syed Mohsin Raza.

The Fluctuating Flow of a Gas Near a Stagnation Point on a Hot Wall R. Gribben Gribben, R. (December 1, ). "The Fluctuating Flow of a Gas Near a Stagnation Point on a Hot Wall." ASME.

Calculation of the fluctuations in the skin-friction and heat-transfer rate at the wall support previous approximate results at low Cited by: of axisymmetric stagnation-point flow of an incompressible viscous fluid towards a stretching surface was also analyzed by Mahapatra and Gupta ().

Axisymmetric stagnation-point flow towards a stretching surface in the presence of a uniform transverse magnetic. The characteristics of the fluctuating pressure for the 15° expansion corner of an axisymmetric body have been investigated experimentally using dynamic pressure measurements and Schlieren photograghs.

Data were acquired over a Mach number ranging from to The angles of attack ranged from 0° to 5°. Pressure signals were measured simultaneously in several positions along the axis of Author: Hong Xiao, Chao Gao, Zhen Kun Ma.

The similarity of pressure fluctuations in front of and behind the plate in Figure 5 suggest that surface pressure fluctuations are related to the movement of the recirculation region, and possibly of the stagnation point. It has been shown, however, that large instantaneous drag on the plate is caused by the vortex structures in the by: 1.

A general correlation for the stagnation point Nusselt number of an axisymmetric impinging synthetic jet Tim Persoonsa,*, Alan McGuinna, Darina B. Murraya a Department of Mechanical and Manufacturing Engineering, Parsons Building, Trinity College, Dublin 2, Ireland Abstract Whereas the heat transfer mechanisms in steady impinging jets are well understood, the available.

Two axisymmetric stagnation-point flows impinging normal to a rotating, radially stretching disk are studied. One is the classic Homann stagnation flow and the other is the rotational Argawal stagnation flow. The combined effects of uniform rotation and linear radial stretching give a disk surface velocity in the form of a logarithmic by: 3.

the regular sonic-point condition associated with smooth shapes without corners. In the latter case, the sonic point is a saddle point of equations (1)to (3) whose location is not known a priori (ref. 4);the desired solution is the integral curve which passes through the saddle point File Size: 2MB.

axisymmetric stagnation-point flow on a thin circular cylinder. The aim of this paper is to extend the paper by Gorla [6] on heat transfer in axisymmetric stagnation point flow on a thin infinite circular cylinder to the case when the Reynolds number is large.

Basic equations. nonsimilar axisymmetric stagnation flow on a moving cylinder (Gorla ); transient response behavior of an axisymmetric stagnation flow on a circular cylinder due to time-dependent free stream velocity (Gorla ); unsteady viscous flow in the vicinity of an axisymmetric stagnation-point on aCited by: 3.

The characteristics of the fluctuating pressure in the boundary layer of an axisymmetric body have been investigated experimentally using dynamic pressure measurements and Schlieren photograghs.

Data were acquired at subsonic and super-sonic Mach numbers. The angles of attack ranged from 0° to 5°. Pressure signals were measured simultaneously in several positions along the model and were Author: Hong Xiao, Chao Gao, Zhen Kun Ma. heat transfer in an axisymmetric stagnation flow over an infinite circular cylinder.

Gorla [7] presented a boundary layer analysis for the mixed convection in an axisymmetric stagnation flow over a vertical cylinder with arbitrary temperature variations. Two flow regions, namely, the buoyancy-assisted and.HEAT TRANSFER IN AXISYMMETRIC STAGNATION FLOW ON THIN CYLINDERS CORNELIA REVNIC, TEODOR GROS¸AN, AND IOAN POP respectively, uand varethe velocitycomponents alongxand y-axes, pis the pressure, T is the temperature, kis the thermal diffusivity of the viscous fluid, ρis the fluid to the region of the forward stagnation point of the.Non-stationary shock motion unsteadiness in an axisymmetric geometry with pressure gradient Citation: W.

J. Baars, Tinney, C. E., and Ruf, J. H., “Non-stationary shock motion unsteadiness in an axisymmetric geometry with pressure gradient,” Experiments in Fluids, DOI: /sy, vol. 56, no. 92, pp.