Measurement of water temperature and velocity fields by applying thermography on two-phase flow through horizontal rectangular channel

Laurinavicius, Darius; Šeporaitis, Marijus; Valinčius, Mindaugas; Gasiūnas, Stasys

doi:10.2298/tsci160502129l

Cited by 3 publications

(5 citation statements)

References 22 publications

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“…The test section has 2 m long elliptic shape (1.8 × 1. The SHST model was designed under the requirements of simplicity, bionics [20], experience [2][3][4] and recommendations [9,13], fig. 2.…”

Section: Experimental Set-upmentioning

confidence: 99%

“…The high-quality methods are the methods such as the Laser-Doppler anemometry [5], the holographic interferometry [3], the particle image velocimetry (PIV) [8], and IRT. The IRT, for example, is applied in different areas of science and technology, such as fluid dynamics [9,10], insulation monitoring of the industrial facilities [11,12], humidity monitoring of buildings, museums and heritage buildings, civil objects energy efficiency detection, the detection of the processes in installations (heating/ cooling and electric), inside and out of the rigid walls, studying of the artefacts, inspection of the structure of construction materials, smart machines, surveillance and military use, and medicine (IR mammography). In practices, IRT is used for testing in the free flight and in the wind tunnels [1,13], mostly at high subsonic and supersonic velocities.…”

Section: Introductionmentioning

confidence: 99%

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Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test

Linić¹,

Ocokoljić

Ristić³

et al. 2018

THERM SCI

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Methods of diagnosing aerodynamic characteristics are constantly developing in order to conduct the precise and energy efficient wind tunnel testing of transport vehicles in the prototype design early stages. This is of a special importance when facing the time/cost consumption problems of detection of the transition zone over the simplified design of the high-speed train. Herein the applied thermodynamics found a very significant role in the field of experimental aerodynamics. With the intention of detecting the boundary-layer transition zone the following measurements were applied: the infrared thermography, flow visualization, and drag force measurements. In addition, the CFD was applied to predict the flow behaviour and transition zone, solving PDE consisting of the Reynolds-averaged Navier-Stokes equations, energy equation, and the equation of state for an ideal gas employing density-based solver. The thermal imaging defined the transition zone by simple application, and fast recognition, while the transition bounds were defined in the analysis. The flow visualization confirmed thermography results and the method itself as favourable, especially in the most expensive early phases of redesigning for aerodynamically optimized and energy efficient solutions. The numerical method was confirmed by the experiments, resulting in acceptable differences in the definition of the transition zone. For a better understanding of the phenomenon, the overlapped implementation of the presented methods focused on forced convection showed as the best solution. Based on the experiences of this research, development of the additional equipment and adjustments will be introduced in the future experiments.

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Section: Experimental Set-upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test

Linić¹,

Ocokoljić

Ristić³

et al. 2018

THERM SCI

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“…The advantages of this approach include improvement in visible (VIS) and IR camouflage, providing a camouflage effect that is resistant to washing and wear. The method’s drawbacks include its high expense and efficient reduction of reflectance overall. , …”

Section: Introductionmentioning

confidence: 99%

“…The method's drawbacks include its high expense and efficient reduction of reflectance overall. 34,35 1.2. UV and NIR-Protective Cotton Fabric by Polyurethane.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Multifunctional Tents Using Canvas Fabric

Alvi,

Maqsood,

Iftikhar

et al. 2024

ACS Omega

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Herein, this study was compiled to investigate a suitable solution for the fabrication and development of the multifunctional defense tent from previously reported research. The military always needs to protect their soldiers and equipment from detection. The advancement of infrared detection technology emphasizes the significance of infrared camouflage materials, reducing thermal emissions for various applications. Objects emit infrared radiation detectable by devices, making military targets easily identifiable. Infrared camouflage mitigates detection by lowering an object's infrared radiation, achieved by methods such as reducing surface temperature, which is crucial in designing military tents with infrared (IR) camouflage, considering water repellency and antibacterial features. Water repellency, as well as antimicrobial properties, in army tents is also important as they have to survive in different situations. All these problems should be addressed with the required properties; therefore, the authors try to introduce a new method from which multifunctional tents can be produced through economical, multifunctional, and sustainable materials that have IR protection, water repellency, ultraviolet (UV) protection, air filtration and permeability, and antimicrobial properties. There is still no tent that performs multiple functions at a time, even those functions that do not correlate with each other such as water repellency, IR protection, antimicrobial, and air permeability. So, a multifunctional tent could be the solution to all these problems having all the properties discussed above. In this study based on the literature review, authors concluded a method for the required tent for canvas fabric coated with zinc sulfide (ZnS), graphene oxide (GO), and zinc oxide (ZnO), or these materials should be incorporated in fiber formation because fiber composition has more impact. These multifunctional tents will be very beneficial due to their multifunctions like weather resistance, durability, and long life. These would help the army in their missions by concealing their soldiers and equipment from detection by cameras and providing filtered air inside the tent in case of gases or explosions. The proposed method will help to fulfill the stated and implied needs of customers.

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Improvement of VIS and IR camouflage properties by impregnating cotton fabric with PVB/IF-WS2

et al. 2021

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Measurement of water temperature and velocity fields by applying thermography on two-phase flow through horizontal rectangular channel

Cited by 3 publications

References 22 publications

Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test

Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test

Fabrication of Multifunctional Tents Using Canvas Fabric

Improvement of VIS and IR camouflage properties by impregnating cotton fabric with PVB/IF-WS2

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