Losses in Very Long Insulated Steam Pipelines

1988 ◽  
Vol 110 (1) ◽  
pp. 43-47 ◽  
Author(s):  
A. K. Mitra ◽  
W. T. Rouleau
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Numerical Method ◽  
Compressible Fluid ◽  
Computer Software ◽  
Flow And Heat Transfer ◽  
Compressible Fluid Flow ◽  
Mass Flows ◽  
Inlet Conditions ◽  
Fundamental Equations

A numerical method has been developed for calculating the losses and property variations in very long insulated steam pipelines. This method is based on the fundamental equations of compressible fluid flow and heat transfer, and utilizes computer software for evaluation of steam properties. Examples illustrate the effects of different inlet conditions, mass flows, and insulation thicknesses. Choking occurs under some conditions.

Experimental Investigation of Skin Friction Drag and Heat Transfer on the Surfaces With Concavities in Compressible Fluid Flow

2010 ◽  
Author(s):  
Alexander A. Titov ◽  
Alexander I. Leontiev ◽  
Uriy A. Vinogradov ◽  
Andrey G. Zditovets ◽  
Mark M. Strongin
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Heat Transfer Enhancement ◽  
Skin Friction ◽  
Compressible Fluid ◽  
Temperature Fields ◽  
Friction Drag ◽  
Transfer Enhancement ◽  
Supersonic Wind Tunnel ◽  
Compressible Fluid Flow

This experimental study has been performed to investigate the surface heat transfer enhancement in compressible fluid flow by using hemispherical concavities (dimples). The experiments were carrying out in supersonic wind-tunnel with free-stream Mach number 2,8. Using the IR-imager the temperature fields of the testing plates were obtained at any time of experiments. The studying of these fields at unsteady conditions allowed to obtain the area-averaged heat transfer coefficient. The skin friction drag of the test plates was found by direct weight measurement with using a “smoothing element”. The skin friction drag and heat transfer were measured simultaneously (at the same conditions) in each experiment. The plate with dimples with ratio of dimple depth to dimple print diameter 0,14 was investigated. It was shown that the tested surface with concavities (vortex generation relief) intensified the heat transfer and decreased the recovery factor in supersonic flow. The ratio of the heat transfer enhancement to the skin friction drag increasing for the dimpled surface in compressible flow is equal to 0,7.

scholarly journals Viscoelastic fluid flow through a porous filler during molding of composite products in closed molds

2020 ◽  
pp. 17-18
Author(s):  
A. V. Baranov ◽  
S. A. Yunitsky
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Numerical Method ◽  
Viscoelastic Fluid ◽  
Finite Differences ◽  
Newtonian Liquid ◽  
Brinkman Equation ◽  
Porous Filler ◽  
Flow And Heat Transfer ◽  
Flow Through

The flow and heat transfer during impregnation of the filler with a non-Newtonian liquid in the process of forming composite products in closed forms is investigated. The flow is described by the Brinkman equation. In terms of rheology, medium is the Phan-Thien-Tanner fluid. The problem is solved by a numerical method of finite differences.

A Parametric Numerical Study of Fluid Flow and Heat Transfer in a Computer Chassis

2015 ◽  
Vol 9 (3) ◽  
pp. 242 ◽  
Author(s):  
Efstathios Kaloudis ◽  
Dimitris Siachos ◽  
Konstantinos Stefanos Nikas
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Numerical Study ◽  
Flow And Heat Transfer
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