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Tuesday, July 28, 2020 | History

2 edition of Heat transfer and pressure profiles in the vicinity of annular orifices found in the catalog.

Heat transfer and pressure profiles in the vicinity of annular orifices

Peter Stanton Williams

Heat transfer and pressure profiles in the vicinity of annular orifices

by Peter Stanton Williams

  • 258 Want to read
  • 38 Currently reading

Published .
Written in English

    Subjects:
  • Heat exchangers.

  • Edition Notes

    Statementby Peter Stanton Williams.
    The Physical Object
    Pagination86 leaves, bound :
    Number of Pages86
    ID Numbers
    Open LibraryOL14300205M

    Oct 12,  · The present paper describes the heat transfer characteristics of an annular turbulent impinging jet with a confined wall. The local temperature distribution on the impingement surface was measured using a thermosensitive liquid crystal sheet and an image processor. The net heat flux was evaluated by considering the heat conduction in the heated substrate and the thermal radiation Cited by: An experimental investigation of the effect of orifice diameter and heat-transfer rate on static-pressure measurements has been made in the flow region between contin­ uum and free molecule. Heat-transfer and pressure measurements were obtained over a range of tunnel test conditions with Mach number varying from to , total.

    transfer, their presence greatly had influenced the heat transfer from the uncovered area of the cylinder. The effect of fins on heat transfer from the cylinder was found negative except for very thin fins. Ullmann and Kalman [5] investigated increasing the heat dissipation of annular fins at a defined magnitude of mass. Four different cross. Dec 03,  · Flow through annulus calculator excel spreadsheet for liquid flow pressure drop, frictional head loss, liquid flow rate, manning roughness coefficient including pipe flow, flow measurement, stormwater measurement, heat transfer coefficients, open channel flow, structural analysis of beams, and more. Search. Main menu. Flow Through.

    Convective heat transfer was also measured along the liner wall of a gas turbine annular combustor fitted with radial swirlers for Reynolds numbers , , and The impingement location of the flow exiting from the radial swirler resulted in peak heat transfer regions along the concave wall of the annular combustor. In this paper, the mixed convective heat transfer and pressure drop characteristics of a buoyancy-aided nanofluid flow in a vertical tube is investigated experimentally. As such, this research is conducted to study the effect of using copper oxide nanoparticles on the heat transfer and pressure drop characteristics of the heat transfer oil flow.


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Heat transfer and pressure profiles in the vicinity of annular orifices by Peter Stanton Williams Download PDF EPUB FB2

Description. The Annular Orifice block models a variable orifice created by a circular tube and a round insert, which may be eccentrically located with respect to the tube. The radial gap between the tube and the insert and its axial length are assumed to be essentially smaller than the insert diameter, causing the flow regime to be laminar all the time.

in an annulus with an externally enhanced inner tube Ajay K. Agrawal Pressure drop and heat transfer characteristics of promoters are obtained at various geometric and flow conditions. These are compared to an unenhanced (circular) tube annulus of identical length and heat transfer surface area and the annular gap, while the promoter.

Heat transfer in annular flows may occur both with and without phase change. Annular flow heat transfer with phase change (evaporation or condensation), is encountered in a wide range of industrial plant.

Heat transfer in evaporation in the annular flow regime is noteworthy for high heat transfer coefficients. Heat transfer in an annular gap 2 10 - \ 10 TA- FIG. Heat-transfer coefficient vs modified Taylor number at a Prandtl number of and a Reynolds number of 0, smooth; slotted.

in axial flow may actually cause a decrease in heat- transfer runrevlive.com by: Heat Transfer and Pressure Drop in Concentric Annular Flows of Binary Inert Gas Mixtures R.S.

Reid, J.J. Martin, D.J. Yocum,* and E.T. Stewart Marshall Space Flight Center, Marshall Space Flight Center, Alabama *Graduate Student Research Program employee in support of Marshall Space Flight Center.

Since the principal purpose of this paper is to compare the detailed exit flow structure, wall pressure and heat transfer characteristics of an annular impinging jet with/without swirling motion and not to examine the effects of swirl number on these characteristics, the swirl number is runrevlive.com by: Feb 20,  · Measured were pressure drop and heat transfer characteristics with uniform axial heat input using air as the working fluid in both the entrance and fully developed regions of annular tubes with wave-like longitudinal fins.

Five series of experiments were performed for turbulent flow and heat transfer in the annular tubes with number of waves equal to 4, 8, 12, 16 and 20, respectively. The test Cited by: title = "Heat transfer from rotating annular fins", abstract = "Experiments have been performed to determine the heat transfer coefficients for arrays of shaft-attached, rotating annular fins.

The experiments encompassed a wide range of rotational speeds and interfin spacings (including the limiting case of the single annular fin).Cited by: 9. flow regime [1]. Unfortunately, heat transfer and pressure drop performances in the transitional flow regime is un-explored for many heat transfer applications including that of annular passages of tube-in-tube heat exchangers, one of the most common heat exchanger types.

The ratio of the inner tube’s outer diameter to the outer. Mokheimer [1] considered the "performance of annular fins with different profiles subject to variable heat transfer coefficient". This was a study using flat plates and known fin efficiency curves.

A survey of the available pertinent literature reveals a great lack of information on turbulent heat transfer and pressure drop for annular channels with pinned internal wall. Carnavos () reported experimental results for turbulent heat transfer and pressure drop in internally finned tubes with longitudinal fins.

Characteristics of Refrigerant Film Thickness, Pressure Drop, and Heat Transfer in Annular Flow Evan T. Hurlburt and Ty A. Newell Abstract Common refrigeration and air conditioning cycles are dependent on two-phase flow for efficient heat transfer with minimal pressure drop.

Design of. Proceedings of the 2nd International Conference on Fluid Flow, Heat and Mass Transfer Ottawa, Ontario, Canada, April 30 – May 1, Paper No.

Prediction of Heat Transfer Coefficient in Annular Flow Regime for Flow Boiling in a Horizontal Micro Tube at a. May 31,  · Hi.

I am stuck on a project on calculation of heat convection transfer coefficient for a annular finned pipe. All parameters [Diameter of pipe, diameter of fins for each case, the distance between fins, fin thickness, pipe length and fin number] are determined.

And I have two book. the heat transfer peak locations and pressure distributions. A CFD study was performed using Fluent and turbulence models and used to corroborate and verify the experimental results.

Results show that the heat transfer enhancement in the annulus has slightly different characteristics for. Experimental Heat Transfer in an Annular Channel and 3-Rod Bundle Cooled With Upward Flow of Supercritical Water and HTC profiles of SCW at a pressure of MP a Book Series No.

1), A. DETERMINATION OF THE HEAT TRANSFER COEFFICIENT DURING ANNULAR FLOW CONDENSATION IN SMOOTH HORIZONTAL TUBES Abstract:In this study, a model describing the relationship between pressure drop and heat transfer coefficients was developed to calculate the heat transfer coefficient under two-phase annular flow conditions.

According to these. Heat Transfer and Flow Region Characteristics Study in a Non- Annular Channel between Rotor and Stator M. Nili-Ahmadabadi1, runrevlive.comi2 1Faculty of Mechanical Engineering Isfahan University of Technology-Isfahan-Iran 2 Research Engineer, Mobin Vision Sharif company- Tehran- Iran Abstract: This paper will present the results of the experimental investigation of heat transfer in a.

importance, the available information on heat transfer and pressure drop on the annular side of such heat exchangers is limited. Flow in helically coiled circular tubes experience a centrifugal force promoting a secondary flow that enhances the heat transfer relative to straight tubes.

Additionally, the. Prediction of laminar and turbulent flow heat transfer in annular passages Mujeeb Rehman Malik Iowa State University Malik, Mujeeb Rehman, "Prediction of laminar and turbulent flow heat transfer in annular passages" ().Retrospective Theses and Dissertations.

Initial profiles 90 3. Solution of the finite-difference equations. Simplified Solutions to Circular Annular Fins with Contact Resistance and End Cooling M. M. Yovanovich,* J. R. Culham,? and T. F. LemczykS University of Waterloo, Waterloo, Ontario, Canada One- and two-dimensional solutions are obtained for circular annular fins of constant cross-section having uniform base, end, and side conductances.Discharge coefficients for annular orifices formed between pistons and a cylindrical bore are reported for twelve pistons having orifice length to gap ratios in the range 12 to Square-edged, radiused and tapered orifices are examined at high fluid pressure differentials with .Review on a Heat Transfer from Annular Fins of Circular and Elliptical Cross Section Kiran Nagargoje1 A.

M. Patil2 1Student 2Associate Professor 1,2Department of Mechanical Engineering 1,2PVPIT, Budhgaon, India Abstract—Heat transfer enhancement is now a major focus of researcher in heat transfer field. Use of annular fins is the.