The influence of nozzle-to-plate spacing on heat transfer and fluid flow of submerged jet impingement

Choo, Kyosung; Friedrich, Brian K.; Glaspell, Aspen W.; Schilling, Karen A.

doi:10.1016/j.ijheatmasstransfer.2016.01.060

Cited by 47 publications

(16 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analytical and experimental heat transfer characteristics of single and multiple turbulent jets of air impinging on flat plate surfaces were studied for circular, slot jet, and cross-flow for developing correlations (Livingood and Hrycak, 1973). Effect of nozzle-to-plate space (0.1 to 40) on heat transfer and fluid flow characteristics of submerged jet impinging was studied with air and water as the working fluid, and the correlation was developed for the stagnation point Nusselt number (Choo et al, 2016). Experimental and theoretical studies on convective heat transfer in outward airflow rotor-stator geometries with and without impinging jet were performed by Harmand et al (2013).…”

Section: Introductionmentioning

confidence: 99%

Effect of Steel Plate Thicknesses and Fluid Flow Characteristics of an Impinging Air Jet on Heat Transfer at the Stagnation Point

Jeyajothi

Kalaichelvi

2019

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

The design and process of heat transfer elements, from its source to heat sink through various media vary according to the product and system concerned. The effect of thickness of a steel plate on heat transfer characteristics with an impinging air jet at the stagnation point was studied. Experiments were carried out with different nozzles, heights, and velocities. It was concluded that the heat transfer increases with the increase in velocity and the increase in Reynolds Number, but decreases with the increase in nozzle height from the impinging point. A maximum stagnation Nusselt number of 309.06 was obtained at the optimum conditions with a plate thickness of 3 mm. The new empirical correlations calculated from the experiments were in reasonable agreement with the equations in the literature and the deviation was less than 15%.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Steel Plate Thicknesses and Fluid Flow Characteristics of an Impinging Air Jet on Heat Transfer at the Stagnation Point

Jeyajothi

Kalaichelvi

2019

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…The results from the experimental work and simulations are then analysed and discussed, along with the impacts relating to the heat transfer that occurred due to the impingement of the twin jets on the hot plate surface. The study further investigates the twin impingement jet flow, by examining the influence and effects of applying different parameters, such as Nozzle-Nozzle spacing and Nozzle-plate distance [4,5]. The flow characteristics of twin jets incorporate the velocity of the air jet in the external hole when the Reynolds number is equivalent to 17,000.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Simulation of the Heat Transfer Enhancement on the Twin Impingement Jet Mechanism

et al. 2018

View full text Add to dashboard Cite

This article presents a study which sought to enhance heat transfer by employing a twin jet impingement mechanism (TJIM) and investigating the impact of the distance between the nozzles and plate on the Nusselt number (Nu) and heat transfer coefficient. This investigation was additionally based on the measurements of the heat flux temperature micro foil sensor and IR thermal imaging. A computational study of the cooling heated plate, through simulating the electronic components by the TJIM, was investigated using the RNG k-ε turbulence model. The jet-plate position was changed at the different jet-to-plate distances S = 1, 6, and 11 cm, Reynolds number = 17,000. The main flow structure, the static pressure, local and average Nus and heat transfer coefficient, were also examined. The findings have yielded new information about TJIM, and represent a new contribution about the flow and heat transfer characteristics of TJIM, and means of improving the rate of heat transfer in the passive heat transfer technique. The results of the various positions of the TJIM determined that the first model is, in fact, the best model for the heat transfer coefficient and the highest Nu, when S = 1 cm and H = 1 cm. Furthermore, the irregular distribution of the local Nu and the local heat transfer coefficient (h) on the impinged surface are due to the increase or decrease in the turbulence of flow on the measured surface.

show abstract

“…These boundary layers can be of tens of microns thick (Chen et al, 2000). Engineering applications using impinging jets include turbine blade cooling, metal annealing, textile drying (Choo et al, 2016), high temperature gas turbine cooling systems, cooling of electronic components, drying of wood, paper and film industries, treatment of glass, tempering of metals and plastic plates, and more recently, industrial food processing (Şara et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the diffusion-controlled corrosion of copper in the bottom of a jet stirred reactor

Helal

Farag

Mansour

et al. 2018

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

Jet stirred tank reactors are usually preferred to mechanically stirred tank reactors in the case of high pressure stirred tank reactors in order to avoid the mechanical problems inherent with mechanically agitated reactors. Owing to the impact force exercised by the fluid jet on the tank bottom, the tank bottom is subjected to severe corrosion. The aim of the present work is to address this problem using an accelerated system which simulates natural diffusioncontrolled corrosion of metals. Diffusion-controlled corrosion of a fixed copper disc, at the bottom of a cylindrical tank, under a single phase forced jet flow of acidified dichromate solution was investigated. Variables studied were: physical properties of the solution, solution velocity through different diameters of jet nozzle, distance between the jet outlet nozzle and the copper disc surface; and the effect of using a drag reducing polymer. An overall correlation was obtained: Sh = 0.579 Sc 0.33 Re 0.975 (h/d) 0.049 valid for 850 < Sc < 1322, 1852 < Re < 5000 and 0.3 < h/d < 1.2. Addition of polyethylene oxide as a drag reducing polymer was found to diminish the rate of corrosion under single phase forced jet flow by an amount depending on the operation conditions.

show abstract

The influence of nozzle-to-plate spacing on heat transfer and fluid flow of submerged jet impingement

Cited by 47 publications

References 12 publications

Effect of Steel Plate Thicknesses and Fluid Flow Characteristics of an Impinging Air Jet on Heat Transfer at the Stagnation Point

Effect of Steel Plate Thicknesses and Fluid Flow Characteristics of an Impinging Air Jet on Heat Transfer at the Stagnation Point

Experimental and Numerical Simulation of the Heat Transfer Enhancement on the Twin Impingement Jet Mechanism

Experimental study of the diffusion-controlled corrosion of copper in the bottom of a jet stirred reactor

Contact Info

Product

Resources

About