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Wednesday, July 22, 2020 | History

3 edition of Unsteady stagnation-point heat transfer during passage of a concentrated vortex found in the catalog.

Unsteady stagnation-point heat transfer during passage of a concentrated vortex

David L. Rigby

Unsteady stagnation-point heat transfer during passage of a concentrated vortex

by David L. Rigby

  • 234 Want to read
  • 34 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:
  • Vortex-motion.,
  • Boundary layer.

  • Edition Notes

    Other titlesUnsteady stagnation point heat transfer ....
    StatementDavid L. Rigby and William J. Rae.
    SeriesNASA contractor report -- 182297., NASA contractor report -- NASA CR-182297.
    ContributionsRae, William J., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18057377M

    This banner text can have markup.. web; books; video; audio; software; images; Toggle navigation.   Negligible heat transfer The density of a gas is inversely proportional When the flow is irrotational, the to temperature, and thus the Bernoulli equation should not be used for Bernoulli equation becomes applicable flow sections that involve significant temperature change such as heating between any two points along the flow or cooling sections.

    Ch 6 Differential Analysis of Fluid Flow part - Free download as Powerpoint Presentation .ppt), PDF File .pdf), Text File .txt) or view presentation slides online. Scribd is the world's largest social reading and publishing site. radiative heat-transfer rate incident on the stagnation point rate at which heat is stored in the surface material qstored qt,rd ql 7" rt R reference convective heat-transfer rate at the stagnation point dynamic pressure, pt U2 cross-section radius from the axis-of-symmetry to a point in the boundary layer, Fig. radial distance to the.

    Includes bibliographies. The bubble migrates away from the near wall and the corner during its expansion and moves back toward them during its collapse, but at a much larger speed and amplitude. A velocity stagnation point forms at the start of the collapse, and a high-pressure zone is generated at the base of the jet during the late stages of the collapse, which.


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Unsteady stagnation-point heat transfer during passage of a concentrated vortex by David L. Rigby Download PDF EPUB FB2

NASA Contractor Report AIAA Unsteady Stagnation-Point Heat Transfer During Passage of a Concentrated Vortex (BASA-Cfi) OIS4EADP S5AGEAIICI-POI3T n tEAT 1EANSEEb ECflBG EASSAGP CI A CCICBLIBATED VCblEP Final 6eFcrt (State Univ. of Ber Ycrlr) 14 CSCL 20D Unclas G3/34 02 David L.

Rigby and William J. Rae. Get this from a library. Unsteady stagnation-point heat transfer during passage of a concentrated vortex. [D L Rigby; William J Rae; United States. National Aeronautics and Space Administration.].

The unsteady stagnation point flow and heat transfer over a stretching/shrinking sheet with suction/injection is studied. The governing partial differential equations are converted into nonlinear ordinary differential equations using a similarity transformation and solved numerically.

Both stretching and shrinking cases are considered. Results for the skin friction coefficient, Cited by:   Theory of Stag. Convective Heat Transfer 14 • Pioneering engineering theories were developed in the ’s (missile technology) Lees, L.

“Laminar Heat Transfer Over Blunt-Nosed Bodies at Hypersonic Speeds,” Jet Propulsion, pp. Apr. Fay, J.A. and Riddell, F.R., “Theory of Stagnation Point Heat Transfer in. Stagnation-Point Heat Transfer During Impingement of Laminar Liquid Jets: Analysis Including 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 isFile Size: KB. American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA Therefore, gas turbine heat transfer and cooling research play a critical role in improving the gas turbine's performance and durability [6].

For film cooling, a secondary flow of cooler air from. stagnation point along its larger dimension. Therefore-the heat transfer rate as measured is an average over this area and is only 9$ of the true stagnation point heat transfer rate assuming a IjTt&onian pressure distribution over the nose of the model.

Discussion of ResultsFile Size: 2MB. Unsteady MHD Heat and Mass Transfer by Mixed Convection Flow in the Forward Stagnation Region of a Rotating Sphere in the Presence of Chemical Reaction and Heat Source Ali J.

Chamkha and Sameh E. Ahmed Proceedings of the World Congress on Engineering Vol I WCEJuly 6 - 8,London, U.K.

ISBN: ISSN: unsteady three-dimensional stagnation point flow and heat transfer of viscous, incompressible fluid on a flat plate. An external flow with strain rate t) impinges obliquely on the flat plate when the plate is assumed to be with transpiration.

This flow consists of an irrotational stagnation-point flow (Hiemenz) and a tangential by: 2. Stagnation point flow and heat transfer behavior of Cu–water nanofluid towards horizontal and exponentially stretching/shrinking cylinders Article (PDF Available) May with 83 Reads.

The effects of Rayleigh numbers on the heat transfer mechanism during the transient process are examined by investigating the Ra=10 4 case in which conduction heat transfer is dominant and the Ra=10 6 case in which convection heat transfer is dominant.

In both cases, only one cell exists at the initial steady flow state and two cells form with. The relation between counter-rotating vortex pairs and the turbulent heat flux is statistically quantified by the following spatial-correlation function Heat transfer in the stagnation region of an impinging plane jet I 9 YB Fig.

Cited by: The effect of the magnetic field on the stagnation point flow and heat transfer of a viscous fluid was studied by Kumari et al.

[7]. The unsteady stagnation point flow of a stretching surface in a three-dimensional flow was studied by Rajeswari et al. [8]. Various aspects of this problem were studied by the authors [9,10]. The. Vortex structure and heat transfer in the stagnation region of an impinging plane jet transfer rate at the stagnation point.

The averaged heat flux from wetted surface of the foil was qw = 44 kW/m’. This value was calculated by evaluating the heat generated from the foil with compensation due. Bhattacharyya, S. Mukhopadhyay, and G. Layek, “Slip Effects on Unsteady Boundary Layer Stagnation-Point Flow and Heat Transfer Towards a Stretching Sheet,” Chinese Phys.

Lett. 28, (). CrossRef Google ScholarCited by: 3. Estimation of the heat-transfer conditions in the neighborhood of the stagnation point during impingement of a jet on an obstacle Yu. Matsevityi 1 V. Barsukov 1Cited by: 2. p is the speci c heat capacity at constant pressure of the fluid, and kis the thermal conductivity of the fluid.

A similarity solution exists if the wall and stream temperatures,T w and T1are constants{a realistic approximation in typical stagnation point heat transfer problems [11,12]. The boundary conditions for the temperature eld are y=0.

Experimental studies of heat transfer and flow regimes during flow boiling of water and alumina nanofluids at different heat and mass fluxes 7 August | Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Cited by:   Elevated regions of heat transfer caused by the corner vortex occur because of the strength of the vortex and the high temperature freestream fluid that forms it.

Particle Image Velocimetry Results Figure contains contour plots of the time-mean symmetry plane vorticity taken from the PIV data with and without leading edge boundary layer. Heat transfer and fluid flow in a non-isothermal constrained vapor bubble is studied in [29J], parametric effects on bubble coverage on electrodes in [26J], characteristics of bubbles generated on micro-heaters in [37J], bubble dynamics during pool boiling in [35J,36J], bubble dynamics in high-frequency acoustic fields in [27J], bubble.Full text of "Hanbook Of Heat Transfer Applications Second Edition" See other formats.Eckert ] has edited a recent survey of heat transfer litera- ture for the 17 year period from through that includes heat transfer references for confined vortex flow and curved flow under the heading of "Channel Flow" (a total of 63 such references) and for rota- ting flow under the heading of "Convection from Rotating Surfaces.