THERMAL SCIENCE

International Scientific Journal

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Yunsong Feng

,

Wei Jin

,

Jin Wang

,

Yuan Lu

A METHOD BASED ON EJECTOR TECHNOLOGY TO SUPPRESS THE INFRARED RADIATION OF THE SPECIAL VEHICLE EXHAUST GAS

ABSTRACT
In this study, a method based on ejector technology is proposed to effectively suppress the infrared radiation associated with the exhaust gas of special vehicles such as tanks, armored vehicles, and missile carriers. These vehicles emit exhaust gases at very high temperatures. First, a mathematical model of the exhaust pipe was established for the exhaust system of a certain type of special vehicle. Then, the 3-D flow field outside the exhaust pipe was numerically simulated using FLUENT 6.3 software. Thus, the temperature, pressure, and density of the exhaust-gas-flow field before and after adopting the proposed ejector technique were obtained. Second, the statistical narrowband model based on the Lorentzian profile was used to determine the average absorption coefficient of a narrow band. Then, the finite volume method was used to solve the radiation transfer equation in the gaseous medium. Finally, the spectral radiation brightness and mid-infrared radiation intensity distribution of the exhaust gas before and after adopting the ejector technique were obtained. Results show that the proposed method considerably decreased the infrared radiation intensity of the exhaust gas by approximately 70%. Thus, using the proposed ejector technology, the infrared radiation associated with the exhaust system of special vehicles can be effectively suppressed.
KEYWORDS
ejector technique, special vehicle, exhaust gas, flow field, temperature, infrared radiation, finite volume method
PAPER SUBMITTED: 2020-06-11
PAPER REVISED: 2020-08-30
PAPER ACCEPTED: 2020-09-23
PUBLISHED ONLINE: 2020-10-31
DOI REFERENCE: https://doi.org/10.2298/TSCI200611315F
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 5, PAGES [3303 - 3313]
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A method based on ejector technology to suppress the infrared radiation of the special vehicle exhaust gas

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence