2 edition of Heat Transfer Augmentation in Turbulent Flows found in the catalog.
Heat Transfer Augmentation in Turbulent Flows
by Begell House Publishers
Written in English
|The Physical Object|
|Number of Pages||266|
This graph shows that corrugation in turbulent flow regimes has a significant enhancing effect for Reynolds numbers ab when compared to the equivalent smooth tubes.. Many techniques have been tried in order to reduce the Reynolds number at which turbulent flow is produced but most have the disadvantage of increasing the resistance to fluid flow: the pressure loss, at a rate which. Heat transfer to steps and cavities in hypersonic turbulent flow. Fluorescent paint for measurement of heat transfer in shock - turbulent boundary layer interaction. Experimental Thermal and Fluid Science, Vol. 10, No. 1 Flow Structures and Heating Augmentation Around Finite-Width Cavity in Hypersonic by:
Augmentation of turbulent flow heat transfer in a horizontal tube with varying width twisted tape inserts varying from to Correlations were developed, yielding close agreement with the correlations of other investigators. Experimental studies were conducted on the heat transfer and flow characteristics for a turbulent flow of air in. Turbulent forced convection and heat transfer structure in the spirally semicircle-grooved tube heat exchanger are numerically examined. The computational problem is solved by finite volume method (FVM) with the SIMPLE algorithm. The influences of groove depth and helical pitch on heat transfer, pressure loss, and thermal performance are investigated for turbulent regime, Re = Cited by: 2.
The statistical description of turbulent flow is considered, taking into account the development of a theory for turbulent flow, the notation for turbulent flows, three-dimensional correlation and spectrum functions, one-dimensional correlation and spectrum functions, and the homogeneity and symmetry of turbulent flows. The equations of motion for turbulent flow are discussed along with Cited by: In designing the target, heat transfer augmentation us- ing micro repeated ribs working as turbulent promotors was focused on in order to remove high heat flux so as keep the temperature of target plates below °C using a relatively low velocity. Another important sub- .
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Heat transfer augmentation in turbulent flows. [A Pedišius; A Shlanchi︠a︡uskas; Lietuvos Energetikos institutas (Kaunas, Lithuania)] -- Turbulent flow is the most common form of motion of liquids and gases playing the role of the heat-transfer medium in thermal systems.
The complexity of turbulent flow and the importance of. turbulent flows and heat transfer Download turbulent flows and heat transfer or read online books in PDF, EPUB, Tuebl, and Mobi Format.
Click Download or Read Online button to get turbulent flows and heat transfer book now. This site is like a library, Use search box in the widget to get ebook that you want. Heat Transfer Augmentation In. Ravigururajan, T. and Bergles, A. E., General Correlations for Pressure Drop and Heat Transfer for Single-Phase Turbulent Flow in Internally Ribbed Tubes, Augmentation of Heat Transfer in Energy Systems, HTD-Vol.
52, ASME, New York, pp. 9–20, Google ScholarCited by: Heat transfer augmentation of turbulent single-phase flow in a concentric tube heat exchanger with short-length twisted tape inserts was numerically examined herein. The twisted tape length ratios.
Heat Transfer Enhancement and Turbulent Flow in a Rectangular Channel Using Perforated Ribs With Inclined Holes Jian Liu, Jian Liu. Experimental Study of Heat Transfer Augmentation in a Two-Pass Channel Featuring V-Shaped Ribs and Cylindrical Dimples,” Heat Transfer Enhancement and Turbulent Flow in a High Aspect Ratio Channel (4: 1 Cited by: 5.
Buy Turbulent Flows and Heat Transfer Books online at best prices in India by C C Lin from Buy Turbulent Flows and Heat Transfer online of India’s Largest Online Book Store, Only Genuine Products.
Lowest price and Replacement Guarantee. Cash On Delivery Available. A power-law relation is derived between the Stanton number and the Reynolds number, expressing the law of heat transfer for a wall adjacent to a region of turbulent separated flow.
The derivation is based on Prandtl's () proposal for the laws of dissipation, diffusion and generation of turbulent. With the use of this expression an analytical solution is obtained for the problem of heat transfer in a cylindrical channel with a developed turbulent flow.
Some specific features of heat. Abstract. Heat transfer augmentation techniques (passive, active or a combination of passive and active methods) are commonly used in areas such as process industries, heating and cooling in evaporators, thermal power plants, air-conditioning equipment, refrigerators, radiators for space vehicles, automobiles, etc.
Passive techniques, where inserts are used in the flow passage to Cited by: 2. Heat transfer in turbulent flow in a tube: A fluid flows through a 1 inch diameter tube that is 20 ft long with a mass flowrate of 15 pounds per min at 50F.
The inside surface of the tube is maintained as constant temperature (ToF) via condensing steam. The article presents the influence of winglet vortex generators (WVGs) placed in the core flow area on thermal performance enhancement of a tube heat exchanger. The experiment was carried out in a uniform wall heat-fluxed tube by varying turbulent airflow for Reynolds number ranging from to Cited by: Comparison of Heat Transfer Augmentation Techniques.
Heat transfer and turbulent flow characteristics over pocket cavity in the junction part of an outlet guide vane in a gas turbine. Heat Transfer Augmentation in Rotating Triangular Channels with Discrete and Cited by: Engineering. The present work shows the results obtained from experimental investigations of the augmentation of turbulent flow heat transfer in a horizontal tube by means of mesh inserts with air as the working fluid.
Sixteen types of mesh inserts with screen diameters of 22mm, 18mm, 14mm and 10mm for varying distance between the screens of 50mm, mm, mm and mm in the porosity range. The subject of this chapter is the influence of flow field turbulence on heat transfer augmentation to both the turbulent and laminar boundary layers.
Initially, the response of turbulence to the presence of a wall is reviewed as background to one of the key constraints in the interaction of turbulence to both turbulent and laminar boundary layers. analysis, providing insights on the mechanisms underlying turbulent transport in a boundary layer with ribs (see Fig.
A modal analysis employig both flow field and Nusselt number measurements allows to hipothesize a direct relation between the coherence of near-wall flow features and the heat-transfer augmentation, suggesting. Direct numerical simulation of turbulent flow and heat transfer in a spatially developing turbulent boundary layer laden with particles; Dong Li, Kun Luo, Jianren Fan; Journal of Fluid Mechanics; Published online: 26 April The bidirectional conical strips were investigated for heat transfer augmentation for laminar flow by Liu et al., and similar vortex structures were found.
Recently, Wang et al.  examined the thermal and flow characteristics in heat exchanger tubes with modified conical strips by Cited by: 4. Eiamsa-ard S., Pethkool S, Thianpong C and Promvonge P. Turbulent flow heat transfer and pressure loss in a double pipe heat exchanger with louvered strip inserts 35 Google Scholar Author: Raman Bedi, K Kiran, A M Mulla, Manoj, Gurumoorthy S Hebbar.
Heat transfer enhancement is the process of increasing the effectiveness of heat can be achieved when the heat transfer power of a given device is increased or when the pressure losses generated by the device are reduced. A variety of techniques can be applied to this effect, including generating strong secondary flows or increasing boundary layer turbulence.
The moment coefficient, as well as local and mean Nusselt numbers, are presently determined as functions of stationary and/or rotating shroud geometry, coolant flow rate, and Reynolds and Prandtl numbers for the heat-transferring turbulent flow between a rotating disk and a stationary wall.
In the solution of the integral momentum equations, the velocity profiles in the boundary layers satisfy. This study investigated the influence of approach flow characteristics, including the boundary layer thickness and character (laminar and turbulent), as well as the approach flow Reynolds number, on the HTC.
The figure of merit for this study was the HTC augmentation, that is, the ratio of HTCs for a cooled versus uncooled : Joshua B. Anderson, David G. Bogard, Thomas E.
Dyson, Zachary Webster.Heat And Mass Transfer (4th Edition) Edit edition. Problem 83P from Chapter 6: One can expect the heat transfer coefficient for turbulent f Get solutions.Wire-loop inserts have also been used for augmentation of laminar and turbulent flow. Heat transfer coefficients can be substantially higher in coiled tubes than in straight tubes because of the secondary flow generated by the curvature.
Twisted-tape inserts have been widely used to improve heat transfer in both laminar and turbulent flow. Correlations are available for laminar flow, for both uniform heat flux .