Experimental and Numerical Investigation of an Offset Jet Using Tangential Air Distribution System

Both, Balázs; Szánthó, Zoltán

doi:10.3311/ppme.8017

Cited by 6 publications

(6 citation statements)

References 16 publications

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“…Fig. shows the converted experimental points from the literature together with our results obtained from the experiments. The revised data by using modified Nu'‐Re equations exhibit a better fit compared to the original values.…”

Section: Resultsmentioning

confidence: 99%

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Volumetric Heat Transfer Coefficient in Fluidized‐Bed Dryers

Poós

Szabó

2018

Chem Eng & Technol

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In literature, there are several Nu=f(Re) equations to specify the heat transfer coefficient between solids and the drying gas, but these equations differ significantly because of the inaccuracy of determining the contact surface between the two phases. A pilot-plant fluidized-bed dryer is developed to study the heat and mass transfer phenomena during the drying process. A volumetric heat transfer coefficient is applied for modeling fluidized-bed dryers. A modified Nusselt number is defined to compare the experimental results and those of the literature. The modified Nu' =f(Re) equation exhibits a proper correlation between the results of the experiments in the literature and those of our experiments.

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Section: Resultsmentioning

confidence: 99%

“…The heat transfer coefficient can be calculated from dimensionless equations, which may be determined by experiments . The measured values can be verified using numerical simulation , and validated by experiments . Experimental studies with procedures and results provide novel application cases for experiment, science, and technology .…”

Section: Introductionmentioning

confidence: 99%

Volumetric Heat Transfer Coefficient in Fluidized‐Bed Dryers

Poós

Szabó

2018

Chem Eng & Technol

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“…Their results imply that the spread rate, flow entrainment, and mixing rate of an offset jet issuing from a circular nozzle are lower than square-shaped one. Both and Szánthó [20] investigated an offset, attached jet both experimentally and numerically, applying the tangential room air distribution system. They applied three turbulence models for the 3D numerical simulation: standard, RNG k-ε and SST k-ω models and the conclusion was that the SST k-ω model seems to be the most accurate turbulence model.…”

Section: Figure 1 Schematic Design Of Offset Jet Flowmentioning

confidence: 99%

Investigation of k-ε Turbulent Models and Their Effects on Offset Jet Flow Simulation

Boroomand

Mohammadi

2019

Civ Eng J

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In the case in which relatively low thickness and high-velocity flow enter into the lower velocity fluid, the resulting interference field of these two flows is called the jet. This phenomenon is the dominant output of power plants and some of the dams. The jets can be divided into two categories of free jets and confined jets, caused by the distance from the discharge to limited boundaries points. The offset jet is a type of confined jet in which both free surface and wall boundaries are near the diffusion location. The jet flow due to the extreme curvature in the main flow path and the proximal portion of this flow with solid boundaries have characteristics that make it difficult to solve with simple turbulence models.In this research, the offset jet phenomenon and related issues have been investigated. For this purpose, the offset jet flow pattern and probable factors in the complexity of this model have been simulated using Fluent software which analyses fluid flow in a two dimensional and three dimensional finite volume method. The simulation of offset jet flow pattern has been performed with a focus on investigating different models of turbulence k-ε, also boundary conditions, various wall functions and other effective coefficients in the numerical model and the model results compared with test case data findings and validating results, the necessary approaches in numerical simulation of this phenomenon for using in the next stages had been taken.

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“…The solar heated air can be distributed in the indoor environment, e.g. as described by Both and Szánthó [21].…”

Section: Operational Principle Of the Transpired Solar Collectormentioning

confidence: 99%

The Potential of Solar Air Heating in the Turkish Industrial Sector

Bokor

Akhan

Eryener

et al. 2018

Period. Polytech. Mech. Eng.

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Transpired solar collector (TSC) systems are simple solutions for the preheating of ventilation air with solar energy. Their performance is a function of several environmental factors, so the climatic conditions of the location play an important role. In this paper, the effect of different climatic zones on the thermal performance of the TSC is investigated. To exclude other sources of influence, the same reference industrial building is examined in four Turkish locations (Antalya, Istanbul, Ankara and Sivas) representing different climatic conditions. RETScreen simulation is carried out for all four regions to obtain the drop of conventional heating requirement in case absorber azimuth of 0°, 45° and 90°. To illustrate the performance, temperature rise, heating energy savings and annual solar fraction are presented. Generally, it can be stated that a location with cold climate and high solar radiation at the same time benefits most from the use of a TSC system. A mathematical correlation has been found showing the solar fraction's dependence on solar radiation and heating degree days. Finally, simulation results have been compared to a set of measurement data from an industrial building's TSC system near Istanbul.

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Experimental and Numerical Investigation of an Offset Jet Using Tangential Air Distribution System

Abstract: In this paper an offset, attached jet is investigated both experi

Cited by 6 publications

References 16 publications

Volumetric Heat Transfer Coefficient in Fluidized‐Bed Dryers

Volumetric Heat Transfer Coefficient in Fluidized‐Bed Dryers

Investigation of k-ε Turbulent Models and Their Effects on Offset Jet Flow Simulation

The Potential of Solar Air Heating in the Turkish Industrial Sector

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