Effects of Baffle Height and Baffle Location on Heat Transfer and Flow Profiles in a Baffled Duct: A CFD Analysis

Boonloi, Amnart; Jedsadaratanachai, Withada

doi:10.1155/2022/3698887

Cited by 2 publications

(3 citation statements)

References 26 publications

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“…For the exchangers without baffles (Eqs. (29)(30)(31)), it can be shown from Fig. 13 that all data are anticipated using the provided equations, with maximum variations of 3.5%, 4.6%, and 4.1% for , , and HTPI, respectively.…”

Section: Correlationsmentioning

confidence: 83%

“…For shell-tube heat exchangers without baffles, Eqs. (29)(30)(31) are applicable to cooling water flowing through the shell side of a counter-flow heat exchanger having CCTs or SCTs with base spacing ratios ranging from 23.6% to 55.1%. In addition, the Reynolds and Prandtl numbers on the shell side range from 3550 to 13900 and 4.78 to 7.28, respectively.…”

Section: Correlationsmentioning

confidence: 99%

“…[30] utilized a reinforcement learner algorithm to optimize thermal performance, Nusselt number, and friction factor in double-pipe heat exchangers with perforated baffles. Boonloi and Jedsadaratanachai's CFD analysis [31] found the best heat transfer rate in a baffled duct, with an optimum thermal enhancement factor of 4.06. [32] studied the hydraulic and thermal performance of inclined baffled channels under pulsing flow conditions, finding thermal enhancement enhanced by pulsation frequency, amplitude, Reynolds number, and heat transmission increase.…”

Section: Introductionmentioning

confidence: 99%

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Effect of baffle configuration on the thermal performance attributes of shell and semi-circular tube heat exchangers

Almulla,

Moawed,

Abd Elrahaman

et al. 2024

Engineering Research Journal (Shoubra)

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This study aims to improve the performance characteristics of a shell-tube heat exchanger in counterflow configuration. It considers the effect of using baffles and semicircular tubes as heat transfer surfaces. Twenty-nine heat exchangers are designed and constructed, consisting of tubes of circular or semicircular tubes (SCTs) with base spacing ratios ( ) ranging from 23.6% to 55.1%. The examined baffles have a pitch ratio ( ) of 1.47 to 2.36, a total cut ratio () of 16.5% to 25% and have two cutting configurations: edge cutting with a cutting ratio () of 0% to 16.5% and internal cutting baffles with a cutting ratio () of 0% to 16.5%. The experiments are done for Reynolds () and Prandtl numbers ( ). The results show that using baffles and/or SCTs increases the heat transfer rate and pressure loss, and when the SCT spacing ratio increases and baffles cut and pitch ratios decrease, these performance metrics significantly rise. However, baffles with edge cutting are better than those with internal cutting. The hydrothermal performance index is evaluated using the Stanton number of the shell side and ratios, with a maximum value of 2.54 achieved by utilizing baffles of  =  = 16.5%,  = 0, = 1.47, and SCTs of = 55.1%, and lowest shellside flow rate and inlet temperature. Finally, correlations are introduced to predict and , besides the performance index of the tested heat exchangers .

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Section: Correlationsmentioning

confidence: 83%

Section: Correlationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of baffle configuration on the thermal performance attributes of shell and semi-circular tube heat exchangers

Almulla,

Moawed,

Abd Elrahaman

et al. 2024

Engineering Research Journal (Shoubra)

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Investigation of Helicopter Blade Tip Configuration during Hover Flight Employing Computational Fluid Dynamics

Stouti,

Lahlou,

Lagrat

et al. 2024

Modelling and Simulation in Engineering

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Our research focused on investigating the influence of rotor blade tip geometry on the aerodynamic performance of helicopters during hover flight, with the goal of enhancing overall efficiency. Through computational fluid dynamics (CFD) analysis using the Bell 212 helicopter configuration, we evaluated four different blade tip geometries: rectangular, anhedral, swept, and parabolic. Our study revealed significant insights into the aerodynamic characteristics of each geometry, including pressure distribution and airflow patterns. Crucially, we observed improvements in the thrust coefficient CT and stability, leading to enhanced efficiency, particularly with the optimized blade tip geometry identified through our comparative analysis. These findings offer valuable guidance for designing more efficient helicopter rotors.

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Effects of Baffle Height and Baffle Location on Heat Transfer and Flow Profiles in a Baffled Duct: A CFD Analysis

Abstract: CFD analysis of flow and heat transfer characteristics in a baffled duct is reported. The baffle locations ( s = 0.05 H – 0.40 H ), flow paths (V-apex directing Downstream or VD and V-apex directing Upstream or VU), and baffle heights ( b … Show more

Cited by 2 publications

References 26 publications

Effect of baffle configuration on the thermal performance attributes of shell and semi-circular tube heat exchangers

Effect of baffle configuration on the thermal performance attributes of shell and semi-circular tube heat exchangers

Investigation of Helicopter Blade Tip Configuration during Hover Flight Employing Computational Fluid Dynamics

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