Numerical investigations on heat transfer characteristics of curved rectangular winglet placed in a channel

Naik, Hemant; Harikrishnan, S.; Tiwari, Shaligram

doi:10.1016/j.ijthermalsci.2018.03.028

Cited by 47 publications

(12 citation statements)

References 38 publications

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“…By comparing Figures 10 (b) and (e), the lowest synergy angle achieved in the case of two pairs of CDW VGs is lower than that achieved in the case of two pairs of DW VGs. This is caused by stronger longitudinal vortices produced by CDWP VGs compared to DWP VGs resulting in better mixing of fluids at these locations [29]. Figures 10 (c) and (f) show the local synergy angle for the case of three pairs of DW and CDW VGs with and without holes at a flow velocity of 0.4 m/s.…”

Section: Effect Of Vortex Generator On Synergy Anglementioning

confidence: 99%

Numerical Analysis of Heat and Fluid Flow Characteristics of Airflow Inside Rectangular Channel with Presence of Perforated Concave Delta Winglet Vortex Generators

Syaiful¹,

Siwi²,

Utomo³

et al. 2019

IJHT

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This study is intended to analyze numerically and experimentally the characteristics of heat transfer augmentation and pressure drop of airflow through vortex generators mounted to a heated plate inside a rectangular channel. Delta winglet pairs (DWPs) and concave delta winglet pairs (CDWPs) vortex generators (VGs) with one, two, and three rows were used in this study. Heat transfer enhancement and pressure drop of flow passing through the VGs with a 5 mm diameter hole for one, two, and three holes in certain positions were investigated. VGs were mounted in-line with an attack angle of 15° to the flow. The airflow was assumed to be incompressible; the steady-state and air velocity were varied in the range of 0.4 m/s to 2 m/s. The analysis showed that the use of holes in the delta winglet vortex generators could reduce the pressure drop of 34.14% from the delta winglet without holes at a velocity of 2 m/s. By using perforated delta (DWP VGs) and concave delta winglet (CDWP VGs), the heat transfer coefficient is reduced by 1.81% and 7.03% of the delta and concave delta winglet vortex generators without holes at a velocity of 2 m/s.

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Section: Effect Of Vortex Generator On Synergy Anglementioning

confidence: 99%

Numerical Analysis of Heat and Fluid Flow Characteristics of Airflow Inside Rectangular Channel with Presence of Perforated Concave Delta Winglet Vortex Generators

Syaiful¹,

Siwi²,

Utomo³

et al. 2019

IJHT

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show abstract

“…The follower contact line is a space curve which is in conjunction with the contact line of the driving wheel. Its equation in the coordinate system is formula (2). i is the transmission ratio between the driving wheel and the driven wheel, and .…”

Section: Figure 1: Diagram Of a Pair Of Concave-convex Arc Tooth Profmentioning

confidence: 99%

“…In 2016, the output value of China' s gear industry is about 230 billion yuan, ranking first in the world, but some key parts still need to be imported [1]. At the 2017 China Gear Industry Congress and CGMA Annual Meeting, Wang Changlu, Secretary-General of Gear Association, analyzed the problems existing in China' s gear industry, especially pointed out that the main problem was the serious inadequacy of gear basic research and independent innovation ability [2]. The lack of key basic research will lead to the lack of support for the development of gear product design and related manufacturing technology.…”

Section: Introductionmentioning

confidence: 99%

“…In order to enlarge the application scope of line gear in the field of medium and small power transmission with conventional size, and to improve the strength of line gear, a design theory and numerical control processing method of concaveconvex arc gear are proposed, which provides a theoretical basis for the design of special NC machine tool for line gear [7].…”

Section: Introductionmentioning

confidence: 99%

“…Formula (6) shows that there is a definite mathematical relationship between the angular displacement and the axial displacement of any point on the active contact line on the cylindrical surface with radius m. In the coordinate system z satisfies the formula (7).…”

mentioning

confidence: 99%

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Nc Machining Method of Concave-Convex Arc Gear

2019

IJOMAM

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In order to improve production efficiency and reduce processing costs, the special NC milling method of concave-convex arc gear is further studied, which provides theoretical basis for the design of special NC machine tool for concave-convex arc gear. A special NC machining method is proposed to modify the existing NC machine tools. The concave-convex arc gears are machined and kinematics experiments are carried out. The results show that the modified machine tools can achieve the desired processing objectives, and the prototype of concave-convex arc gears is machined by the modified machine tools. It can be seen that the feasibility and rationality of the design of special CNC machine tool for linear gears are verified by the comparison of processing time, motion simulation and roughness test.

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Numerical analysis and optimization on flow and heat transfer performance of HPD‐type perforated fins

Dai,

Wang,

Yang

et al. 2024

Can J Chem Eng

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In this paper, we determine the trends and weights of the structural parameters on the heat transfer, flow resistance and comprehensive performance of high pressure direction (HPD)‐type perforated fins using Taguchi method and analysis of variance (ANOVA). The findings underscore the fin height as the most pivotal element affecting comprehensive performance, with its contribution ratio of 42.2%. Ultimately, the highest j‐factor, the lowest f‐factor, and the maximum JF‐factor were obtained as the objective functions, yielding the three most optimal sets of parameters. The findings reveal a remarkable 89.7% reduction in the f‐factor of the optimized HPD‐type perforated fins, accompanied by a substantial 127% augmentation in the JF‐factor compared to the HPD‐type fins.

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Numerical investigations on heat transfer characteristics of curved rectangular winglet placed in a channel

Cited by 47 publications

References 38 publications

Numerical Analysis of Heat and Fluid Flow Characteristics of Airflow Inside Rectangular Channel with Presence of Perforated Concave Delta Winglet Vortex Generators

Numerical Analysis of Heat and Fluid Flow Characteristics of Airflow Inside Rectangular Channel with Presence of Perforated Concave Delta Winglet Vortex Generators

Nc Machining Method of Concave-Convex Arc Gear

Numerical analysis and optimization on flow and heat transfer performance of HPD‐type perforated fins

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