Effect of Fin Geometry on Flow-Induced Vibration Response of a Finned
                        Tube in a Tube Bundle

Arshad, Hassan; Khushnood, Shahab; Nizam, Luqman Ahmad; Ahsan, M. A. H.; Bhatti, O.G.

doi:10.29252/jafm.11.04.28175

Cited by 10 publications

(16 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Arshad et al. 16 carried out a wind tunnel study on a parallel triangular finned tube array with effective pitch ratio of 1.62. They studied the effect of fin thickness, fin density, and tube location on fluid elastic instability.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of fluid elastic vibrations in rotated square finned tube arrays subjected to water cross flow

Desai

Kengar

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

The majority of the failures of shell and tube heat exchanger tubes are reported due to the flow-induced vibration caused by shell side cross flow. Fluid elastic instability, vortex shedding, and turbulent buffeting are the excitation mechanisms responsible for the failure of the tubes. The failure occurs due to tube-to-tube impacts leading to impaction marks on the tube surface and, subsequently, leading to the failure due to fretting wear and fatigue. The present research work deals with the determination of critical velocity at instability for rotated square finned tube arrays subjected to water cross flow. In all, total six tube arrays are tested with two different pitch ratios, each with a plain tube array, a coarse finned tube array, and a fine finned tube array. Pitch ratios considered in the study are 2.1 and 2.6, while fin densities considered are coarse (4 fpi = 6.35 mm) and fine (10 fpi = 2.54 mm). The effect of array pattern, pitch ratio, and fin density on the onset of instability is studied by conducting experiments in the water cross flow. The effect of tube array pattern is studied by comparing the results of the present study with authors' published results for parallel triangular finned tube arrays in the water cross flow. The study led to the conclusion that the instability threshold is delayed for rotated square tube arrays compared to parallel triangular tube arrays. It is also observed that instability thresholds for coarse and fine finned tubes are delayed compared to plain tubes and is found to be more for finned tubes with higher fin densities.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental analysis of fluid elastic vibrations in rotated square finned tube arrays subjected to water cross flow

Desai

Kengar

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…Bernitsas et al (2008), developed a device called VIVACE and conducted VIV tests to investigate its performance, and Lee and Bernitsas (2011), used this VIVACE converter to obtain renewable energy. Arshad et al (2018) investigated the effect of fin geometry on VIV response. They especially focused on fin thickness and fin density.…”

Section: Introductionmentioning

confidence: 99%

Uncertainty Analysis of Experiments of Vortex-Induced Vibrations for Circular Cylinders

Usta

Duranay

2021

JAFM

View full text Add to dashboard Cite

In this study, uncertainty analysis of the vortex-induced vibration (VIV) tests, using a VIV test rig is presented. The VIV test rig is set up on the circulation channel in Ata Nutku Ship Model Testing Laboratory at Istanbul Technical University (ITU). The tests are performed using an elastically mounted rigid and smooth circular cylinder in low mass-damping and high Reynolds numbers conditions. The cylinder has one-degree-of freedom. It is allowed to move perpendicular to the flow while inline vibrations are constrained. The aim of the study is to demonstrate and establish a repeatable procedure to predict the uncertainty of VIV tests, utilizing some example applications of existing ITTC recommendations. Within this aim, five distinct VIV tests are carried out following ITTC guidelines and procedures measuring the amplitude (A * ) and frequency response (f * ) data. Uncertainty analysis study is performed for three different flow velocities, chosen from VIV tests and total uncertainty is calculated by root mean square values of precision and bias uncertainties. The precision uncertainty is predicted using response amplitude values obtained from five sets of VIV tests. The bias uncertainty is predicted utilizing the basic measurements and test results of the components of response amplitude for the cylinder. The results have demonstrated that the current test rig has low uncertainty level. Additionally, it has succeeded to reflect the characteristics of VIV phenomenon in the studied Reynolds number range, which is in the Transition Shear Layer 3 (TrSL3) flow regime. Consequently, it is believed that this study would help in spreading the application of the uncertainty analysis for VIV tests in the future.

show abstract

“…Jandaud et al (2016) has done the geometrical optimization of a three-dimensional CFD modelled heat sink using Variable Neighbourhood Search method in order to minimize the pressure drop and thermal resistance of the system. Arshad et al (2018) has done the experimental study to observe the effect of fin geometry on flow-induced vibration response using parallel triangular finned tube array with P/Deff ratio as 1.62. The authors found that instability threshold is delayed with the increment in fin density.…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Semi-Circular Pin Fins for Application in Electronics Cooling

Yadav¹,

Verma²,

Ray³

et al. 2019

IJRTE

View full text Add to dashboard Cite

Efficient thermal energy management of a system is always a prime requirement for many equipment and industries. The performance of almost all devices are affected by the thermal conditions of the system, which also include the surroundings. Generation of heat is an unavoidable phenomenon for any device that runs on external power sources. The generated heat in such systems must be dissipated to the surrounding. It requires efficient utilization of the surface area with minimum flow losses in the system. It was always desirable to have a heat sink in the all devices that occupy minimum space with maximum effectiveness. The present work is an effort to analyze conjugate heat transfer physics in a 3-D system of aluminum pin fins, with air as the working fluid. A finite element solver, COMSOL 4.3a has been used in simulating a staggered pin fin arrangements placed over a base plate. The solver is validated using the empirical data of previous literature. The thermal analysis has been performed on semicircular pin fins with uniform cross section. Consideration is given to staggered arrangement of semicircular fins with various relative distances between two sections of a circle with various inlet velocities. Heat transfer coefficient, Nusselt number, skinfriction coefficient and pressure coefficient are four parameters that are taken into consideration for analyzing all the fin geometries in the current study. The proposed shapes are designed to increase the wetted surface area by keeping the fin material volume constant.

show abstract

Effect of Fin Geometry on Flow-Induced Vibration Response of a Finned Tube in a Tube Bundle

Cited by 10 publications

References 20 publications

Experimental analysis of fluid elastic vibrations in rotated square finned tube arrays subjected to water cross flow

Experimental analysis of fluid elastic vibrations in rotated square finned tube arrays subjected to water cross flow

Uncertainty Analysis of Experiments of Vortex-Induced Vibrations for Circular Cylinders

Thermal Analysis of Semi-Circular Pin Fins for Application in Electronics Cooling

Contact Info

Product

Resources

About