Pressure distribution and heat exchange in a gasdynamic model with combustion over which a high-enthalpy air stream flows

1986 ◽  
Vol 26 (5) ◽  
pp. 653-661 ◽  
Author(s):  
V. K. Baev ◽  
V. V. Shumskii ◽  
M. I. Yaroslavtsev
Keyword(s):  
Heat Exchange ◽  
Pressure Distribution ◽  
Stream Flows ◽  
High Enthalpy ◽  
Air Stream ◽  
Gasdynamic Model

scholarly journals Application of numerical modelling in stream metrology on the example of primary air installation

2019 ◽  
Vol 82 ◽  
pp. 01006
Author(s):  
Mirosław Kabaciński ◽  
Janusz Pospolita ◽  
Janusz Polak ◽  
Piotr Adamus ◽  
Antoni Salij ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Measurement Problem ◽  
Dynamic Pressure ◽  
Flow Simulation ◽  
Measuring System ◽  
Problem Solution ◽  
System Operation ◽  
Stream Flows ◽  
Flow Disturbances ◽  
Air Stream

Measurements of stream flows are very common in the power industry. High parameters of the fluid, its impurities or the complexity of the flow installation make often such measurement problematic. Flow disturbances are a factor that significantly increases measurement uncertainty. The paper presents an example the measurement problem solution based on mathematical modelling and digital flow simulation. The problem was the measurement of the air stream in a complex mill air flow installation. A measuring system based on a probe averaging dynamic pressure has been developed. The location of the probe was determined by numerically modelling the flow in the considered section of the mill air installation. Monthly observations of the measuring system operation confirmed its high usefulness in the operation of the mill installation.

Calculation of Heat Exchange Characteristics Transpiration Cooling Systems

2015 ◽  
Vol 756 ◽  
pp. 365-371
Author(s):  
A.S. Yakimov
Keyword(s):  
Heat Transfer ◽  
Heat Exchange ◽  
Physical Properties ◽  
Gas Flow ◽  
Transpiration Cooling ◽  
Cooling Systems ◽  
High Enthalpy ◽  
Thermo Physical Properties

The effect of high-enthalpy gas flow on transpiration cooling systems is considered. The influence of thermo-physical properties and porosity of some metals on heat transfer of the models is studied.

Wind-generated waves in thin liquid films with soluble contaminant

1971 ◽  
Vol 45 (3) ◽  
pp. 527-544 ◽  
Author(s):  
F. I. P. Smith ◽  
Alex D. D. Craik
Keyword(s):  
Surface Active Agent ◽  
Active Agent ◽  
Theoretical Work ◽  
Liquid Films ◽  
Stream Flows ◽  
Surface Active Agents ◽  
Air Stream ◽  
Surface Active ◽  
The Stability

Craik (1968) has previously examined the stability of horizontal liquid films when an air stream flows over the liquid surface and when the surface is contaminated by an insoluble surface-active agent. The present theoretical work extends this investigation to examine the role of soluble surface-active agents for cases where the liquid Reynolds number is small. This role is found to be a rather complex one which, under suitable conditions, may be either stabilizing or destabilizing.Related experimental work is described which yields results in qualitative agreement with the theoretical analysis.

Efficiencies, Thermodynamics and the By-Pass Engine

1963 ◽  
Vol 67 (635) ◽  
pp. 736-737 ◽  
Author(s):  
N. le S. Filleul
Keyword(s):  
Heat Exchange ◽  
Theoretical Analysis ◽  
Heat Exchangers ◽  
Practical Interest ◽  
Thermodynamic Approach ◽  
Average Student ◽  
Air Stream ◽  
General Line ◽  
Made In

All too often, points dealing with some aspect or other of the thermodynamics of powerplants are made which are incomplete, ambiguous, erroneous, or a mixture of all three! The purpose of this note is to try to give a limited, but logical, theoretical analysis of one type of propulsion powerplant, namely the by-pass engine with the possibility of heat exchange between the by-pass air stream and the main gas stream before expansion through the propulsion nozzles. This is a problem to which the solution is not obvious, and which would probably present difficulties to the average student. Heat exchangers are perhaps more of hypothetical rather than practical interest at present, but it is important that a correct thermodynamic approach be made in every case. Nothing is less likely to be engineered than a Carnot engine, and the general line of argument should be of wider appeal than the particular example to which it is applied.

scholarly journals Numerical modeling of a flat air solar collector fitted with obstacles

2021 ◽  
Vol 321 ◽  
pp. 04016
Author(s):  
Mohammed Amine Amraoui ◽  
Fayssal Benosman
Keyword(s):  
Heat Transfer ◽  
Numerical Modeling ◽  
Fluid Flow ◽  
Heat Exchange ◽  
Solar Collector ◽  
Air Flow ◽  
Flow Path ◽  
Solar Collectors ◽  
Air Stream ◽  
Ansys Cfx

The weakness of the solution of flat-air solar collectors in the absence of a turbulence promoter has led researchers to seek other means to improve the performance of the collector. to improve the heat exchange in the air stream from the flat solar collector to the air is the creation of baffles or obstacles to give the longest possible flow path and create a large possible turbulence network. In this article, we studied an air flow around an obstacle field in a flat air solar collector, using the Ansys CFX calculator software, we make a digital 3 D similarity and we give results on the heat exchange in the flat air solar collector and the aim of this study is to show the effect of the obstacles for the fluid flow and the heat transfer in the fluid flow of the flat air solar collector.

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