scholarly journals Experimental Investigation of Water Droplet Heating in Humidified Air Flow

Mechanika ◽  
2019 ◽  
Vol 25 (6) ◽  
pp. 434-441
Author(s):  
Virginijus RAMANAUSKAS ◽  
Egidijus PUIDA ◽  
Gintautas MILIAUSKAS ◽  
Linas PAUKŠTAITIS
Keyword(s):  
Experimental Investigation ◽  
Flue Gas ◽  
Volume Fraction ◽  
Air Flow ◽  
Experimental Methods ◽  
Gas Temperature ◽  
Transfer Processes ◽  
Air Heating ◽  
Mass Transfer Processes ◽  
Humidified Air

The droplet heat and mass transfer processes are important for liquid spraying technologies, which were investigated when applying the theoretical and numerical modelling and experimental methods. In this work, results of experimental research on the heating of water droplets in purified biofuel flue gas were presented and analyzed. In experimental investigation, the purified biofuel flue gas is replaced by additionally humidified airflow. The experiment methods and results processing are discussed and provided. Impact of air heating and additional humidification was estimated. While heating and additionally humidifying the air flow was focused on boundary conditions in condense economizers, when the flue gas temperature is 20-100°C and water vapor volume fraction is 0-0.2.

scholarly journals Experimental Investigation of Water Droplet Phase Change in Humidi-fied Air Flow

Mechanika ◽  
2020 ◽  
Vol 26 (3) ◽  
pp. 197-205
Author(s):  
Virginijus RAMANAUSKAS ◽  
Linas PAUKŠTAITIS ◽  
Gintautas MILIAUSKAS ◽  
Egidijus PUIDA
Keyword(s):  
Experimental Investigation ◽  
Phase Change ◽  
Experimental Research ◽  
Water Droplet ◽  
Research Method ◽  
Air Flow ◽  
Equivalent Diameter ◽  
Initial Water ◽  
Humidified Air ◽  
Droplet Phase

An experimental research method and an analysis of the results of a water droplet phase change in the additionally humidified air flow are presented. The diagrams of variation of the equivalent diameter of convectively heated water droplets are presented and analysed. The influence of initial water temperature and additionally humidifying air flow on the phase change of a droplet in transient regime is experimentally substantiated.

scholarly journals Modeling heat and mass transfer processes during evaporation of a water film in a horizontal channel with a cocurrent flow of moist air

2021 ◽  
Vol 2119 (1) ◽  
pp. 012150
Author(s):  
M V Gorbachev ◽  
V I Terekhov
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Air Flow ◽  
Water Film ◽  
Horizontal Channel ◽  
Cocurrent Flow ◽  
Moist Air ◽  
Transfer Processes ◽  
Mass Transfer Processes ◽  
Wide Range

Abstract Modeling of heat and mass transfer processes in a horizontal channel during evaporative cooling of a moist air flow with regard to the finite thickness of the liquid film is considered. The mathematical model consists of a system of differential equations in the boundary layer approximation. The simulation results have been obtained in a wide range of initial parameters: temperature T 0 = 10÷50°C, humidity φ0=0÷100%, Reynolds number Re=100÷2000. Calculations were carried out at atmospheric pressure. Quantitative analysis of influence of initial parameters of flows on values of parameters of wet air flow at the outlet of the channel with and without taking into account the final thickness of the water film was carried out.

scholarly journals Studi eksperimental terhadap porositas dan hambat alir udara pada komposit penyerap suara

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Nasmi Herlina Sari ◽  
Jauhar Fajrin ◽  
IGNK Yudhyadi
Keyword(s):  
Experimental Investigation ◽  
Polyester Resin ◽  
Volume Fraction ◽  
Air Flow ◽  
Composite Sample ◽  
Sound Absorber ◽  
Flow Resistivity ◽  
Air Flow Resistivity

In this paper, we present a comprehensive analytical and experimental investigation for the determination of the air flow resistivity and porosity of sound absorber composite. The ratio of the volume fraction of fiber and polyester resin is 15, 25, 35, 55 and 65 (%).The dimensions of the absorbent composite sample are 29 mm x 20 cm (diameter x thickness). Porosity and Air flow resistivity of composites have been investigated. The results showed that the porosity of the composites increased with increasing amount of fiber due to the interface between fiber and resinless dense. In contrast, the air flow resistivity values are lower with a denser resin and fiber interface.

Study on Sublimation Phenomenon of Horizontal Frost Layer Exposed to Forced Convection Air Flow and Radiant Heat

1996 ◽  
Vol 118 (3) ◽  
pp. 694-701 ◽  
Author(s):  
H. Inaba ◽  
S. Imai
Keyword(s):  
Mass Transfer ◽  
Air Flow ◽  
Radiant Heat ◽  
Moist Air ◽  
Concentration Difference ◽  
Triple Point Of Water ◽  
Transfer Processes ◽  
Mass Transfer Processes ◽  
Air Flow Velocity ◽  
Frost Layer

The present paper deals with a new defrosting method for application to a cold heat exchanger by means of a frost sublimation phenomenon. The frost sublimation phenomenon occurs under the condition of temperature below the triple point of water (0.01°C, 0.6105 kPa). The present experimental study has focused on the heat and mass transfer processes at a horizontal frost layer in a moist airflow. It is found that the mass flux from the frost layer increases with the increase of water vapor mass concentration difference between the frost and main moist air flow, main air flow velocity, and the infrared radiant heat intensity. Nondimensional correlations for mass transfer, heat transfer, and defrost completion time have been derived.

scholarly journals Studi eksperimental terhadap porositas dan hambat alir udara pada komposit penyerap suara

2018 ◽  
Vol 8 (1) ◽  
pp. 35
Author(s):  
N.H. Sari ◽  
J. Fajrin ◽  
I.G.N.K. Yudhyadi
Keyword(s):  
Experimental Investigation ◽  
Polyester Resin ◽  
Volume Fraction ◽  
Air Flow ◽  
Composite Sample ◽  
Sound Absorber ◽  
Flow Resistivity ◽  
Air Flow Resistivity

In this paper, we present a comprehensive analytical and experimental investigation for the determination of the air flow resistivity and porosity of sound absorber composite. The ratio of the volume fraction of fiber and polyester resin is 15, 25, 35, 55 and 65 (%).The dimensions of the absorbent composite sample are 29 mm x 20 cm (diameter x thickness). Porosity and Air flow resistivity of composites have been investigated. The results showed that the porosity of the composites increased with increasing amount of fiber due to the interface between fiber and resinless dense. In contrast, the air flow resistivity values are lower with a denser resin and fiber interface.

Experimental Investigation of Mechanical Properties and Effect of Porosity on Epoxy Granite Composite

2021 ◽  
Vol 1042 ◽  
pp. 123-129
Author(s):  
S. Nallusamy ◽  
M. Rajaram Narayanan ◽  
K. Sujatha ◽  
R. Suganthini Rekha
Keyword(s):  
Mechanical Properties ◽  
Mathematical Model ◽  
Experimental Investigation ◽  
Volume Fraction ◽  
Research Work ◽  
Empirical Relation ◽  
Experimental Methods ◽  
Experimental Results ◽  
Taguchi Design Of Experiments ◽  
The Mathematical Model

The mechanical properties of epoxy granite composite are extensively influenced by the structure of porosity. The aim of this research work is to establish a mathematical model to estimate the correlation among damping and porosity. Also to estimate the correlation among flexural strength and porosity for given epoxy granite composites using experimental methods. The theoretical porosity of epoxy granite in terms of their component properties and volume fraction were determined and verified. Taguchi design of experiments was applied to plan the number of experiments to be carried out. The experimental results obtained from different test were plotted on graph over analytical results. Regression analysis was applied to establish the empirical relation between inherent properties and mechanical properties. Comparison between the analytical model and experimental results was carried out to validate the mathematical model

scholarly journals Studi eksperimental terhadap porositas dan hambat alir udara pada komposit penyerap suara

2018 ◽  
Vol 8 (2) ◽  
Author(s):  
Nasmi Herlina Sari
Keyword(s):  
Experimental Investigation ◽  
Polyester Resin ◽  
Volume Fraction ◽  
Fibrous Composite ◽  
Air Flow ◽  
Composite Sample ◽  
Sound Absorber ◽  
Flow Resistivity ◽  
Air Flow Resistivity

In this paper, we present a comprehensive analytical and experimental investigation for the determination of the air flow resistivity and porosity of sound absorber composite. The ratio of the volume fraction of fiber and polyester resin is 15, 25, 35, 55 and 65 (%).The dimensions of the absorbent composite sample are 29 mm x 20 cm (diameter x thickness). Porosity and Air flow resistivity of composites have been investigated. The results showed that the porosity of the composites increased with increasing amount of fiber due to the interface between fiber and resinless dense. In contrast, the air flow resistivity values are lower with a denser resin and fiber interface.Keywords: Air Flow Resistivity, Fibrous composite, Porosity, Sound Absorber 

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