Experimental investigation on thermal characteristics of hot surface by synthetic jet impingement

Singh, Pushpanjay K.; Sahu, Santosh Kumar; Upadhyay, Prabhat K.; Jain, Akash

doi:10.1016/j.applthermaleng.2019.114596

Cited by 40 publications

(5 citation statements)

References 47 publications

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“…This is achieved by replacing one of the walls of the synthetic jet actuator (SJA) with movable or deformable elements such as piezoelectric, acoustic (loudspeaker), or mechanical (piston) drivers. The SJAs can be used in electronic cooling [1][2][3], flow control [4][5][6], or mixing [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Acoustic and Flow Aspects of Synthetic Jet Actuators with Chevron Orifices

Smyk

Markowicz

2021

Applied Sciences

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The use of a chevron nozzle/orifice is one of the methods of heat transfer enhancement and noise reduction. In the case of synthetic jets, the number of papers on this topic is small. Therefore, a synthetic jet actuator with three different chevron orifices and one circular orifice is investigated. The aim of this study is to find the impact of orifice shape on centerline velocity (measured with a hot-wire anemometer) and determine if the chevron orifice reduces the generated noise. The sound pressure level was strongly dependent on the input actuator’s power, and only one chevron orifice ensured noise reduction for low power (p = 6; 8 W). At real power p = 12 W, the sound pressure level was lower for each chevron orifice actuator than in the case of the circular orifice actuator. It is shown that the application of a chevron nozzle does not have to provide noise reduction. It is important in the case of the design of new actuators that are to operate in places where noise levels should be limited (e.g., offices).

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Section: Introductionmentioning

confidence: 99%

Acoustic and Flow Aspects of Synthetic Jet Actuators with Chevron Orifices

Smyk

Markowicz

2021

Applied Sciences

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“…In 1991, the initial jet impingement for PVT solar collectors was invented (Choudhury et al, 1991;Singh et al, 2020). The initial approach of the jet impingement involves the utilization of a jet plate to enhance the efficiency of the PVT solar collector.…”

Section: Literature Reviewmentioning

confidence: 99%

Performance and economic analysis of a reversed circular flow jet impingement bifacial PVT solar collector

Ishak,

Ibrahim,

Sopian

et al. 2023

Int. J. Renew. Energy Dev.

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As the world shifts towards a more sustainable future, solar energy has emerged as a preeminent and economically feasible alternative to traditional energy sources, gaining widespread adoption. This study presents a reversed circular flow jet impingement (RCFJI) which aims to improve the performance of a bifacial PVT collector. An indoor experiment using a solar simulator to assess the energy, exergy, and economic efficiency of a RCFJI bifacial PVT collector. The study was carried out using a solar irradiance ranging from 500-900W/m2 and a mass flow rate between 0.01-0.14 kg/s. Energy performance-wise, the highest photovoltaic efficiency achieved was 11.38% at solar irradiance of 500 W/m2, while the highest thermal efficiency achieved was 61.4% under 900 W/m2, both obtained at 0.14 kg/s mass flow rate. Regarding exergy performance, the highest photovoltaic exergy obtained was 47.27 W under 900 W/m2 at 0.14 kg/s, while the highest thermal exergy was 9.67 W at 900 W/m2 at 0.01 kg/s. Overall, higher solar irradiance is more desirable for energy and exergy performance. Meanwhile, economic point of view, lower solar irradiance is preferable. Based on the findings, the optimal mass flow rate was 0.06 kg/s.

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“…The impact of amplitude on the heat transfer coefficient resulted in a linear relationship, and the cooling performance was found to be rather insensitive to jet-target surface spacing. An experimental investigation was performed by Singh et al [107] to study the heat transfer characteristics of impinging synthetic jet over a hot surface using various shapes of the orifice, such as circular, square, and rectangular. A maximum heat transfer coefficient that was 16.1 times greater for the current setup versus natural convection was achieved.…”

Section: Excited Jetsmentioning

confidence: 99%

Heat Transfer Augmentation through Different Jet Impingement Techniques: A State-of-the-Art Review

et al. 2021

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Jet impingement is considered to be an effective technique to enhance the heat transfer rate, and it finds many applications in the scientific and industrial horizons. The objective of this paper is to summarize heat transfer enhancement through different jet impingement methods and provide a platform for identifying the scope for future work. This study reviews various experimental and numerical studies of jet impingement methods for thermal-hydraulic improvement of heat transfer surfaces. The jet impingement methods considered in the present work include shapes of the target surface, the jet/nozzle–target surface distance, extended jet holes, nanofluids, and the use of phase change materials (PCMs). The present work also includes both single-jet and multiple-jet impingement studies for different industrial applications.

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Experimental investigation on thermal characteristics of hot surface by synthetic jet impingement

Cited by 40 publications

References 47 publications

Acoustic and Flow Aspects of Synthetic Jet Actuators with Chevron Orifices

Acoustic and Flow Aspects of Synthetic Jet Actuators with Chevron Orifices

Performance and economic analysis of a reversed circular flow jet impingement bifacial PVT solar collector

Heat Transfer Augmentation through Different Jet Impingement Techniques: A State-of-the-Art Review

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