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Journal of Enhanced Heat Transfer
Fator do impacto: 0.562 FI de cinco anos: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN Imprimir: 1065-5131
ISSN On-line: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2012004285
pages 397-408

EXPERIMENTAL STUDY AND OPTIMIZATION OF AIR ATOMIZED SPRAY WITH SURFACTANT ADDED WATER TO PRODUCE HIGH COOLING RATE

Soumya S. Mohapatra
Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur - 721302, India
Satya V. Ravikumar
Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur - 721302, India
Sachin Andhare
Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur - 721302, India
Sudipto Chakraborty
Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur - 721302, India
Surjya K. Pal
Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur - 721302, India

RESUMO

The current research deals with the heat transfer study using air atomized spray with surfactant added water for cooling a hot steel plate (6 mm thick) at high initial surface temperature (~900°C). Experiments were conducted with an air atomized spray at a fixed nozzle-to-plate distance and at different impingement density, air flow rate, and surfactant concentration. An inverse heat conduction model has been developed for the estimation of surface heat flux and surface temperature from the experimentally recorded temperature profile. From the experimental data, response surface methodology (RSM) has been used to derive statistical correlations for cooling rate and surface heat flux. Analysis shows that the predicted values obtained from the statistical model are in close agreement with the experimental data. In addition to the above, the interaction behavior and the optimal values of different process variables (impingement density, air flow rate, and surfactant concentration) are also determined. The achieved cooling rate and the developed correlations can be useful in the steel industry to produce high strength steel.


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