Detached-eddy simulation of the flow behavior in the shell-side of the coil tube bundle in turbulent flow

Wang, Yue; Guo, Shu-Guang; Tan, Wei

doi:10.1016/j.ces.2022.117940

Cited by 2 publications

(1 citation statement)

References 40 publications

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“…Compared to other models, DES not only saves computational resources but also offers faster convergence. In addition, the sublayer contains enough mesh points to sufficiently describe the area gradient, thereby facilitating calculations (Wang et al , 2022).…”

Section: Numerical Simulation Methodsmentioning

confidence: 99%

The influence of vehicle body roll motion on aerodynamic characteristics under crosswind condition

Taiming,

Ma,

Zhang

et al. 2023

HFF

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Purpose The purpose of this study is investigate the transient aerodynamic characteristics of high-speed vehicle with body roll motion under crosswind condition to improve aerodynamic stability. Design/methodology/approach An overset mesh was used to simulate the rolling motion of the vehicle body. A wind tunnel experiment was conducted to validate the numerical method. Findings The results revealed that the vehicle’s aerodynamic characteristics changed periodically with the body’s periodic motion. In the absence of crosswind, the pressure distribution on the left and right sides of the vehicle body was symmetrical, and the speed streamline flowed to the rear of the vehicle in an orderly manner. The maximum aerodynamic lift observed in the transient simulation was −0.089, which is approximately 0.70 times that of the quasi-static simulation experiment. In addition, the maximum aerodynamic side force observed in the transient simulation was 0.654, which is approximately 1.25 times that of the quasi-static simulation experiment. Originality/value The aerodynamic load varies periodically with the vehicle body’s cyclic motion. However, the extreme values of the aerodynamic load do not occur when the vehicle body is at its highest or lowest position. This phenomenon is primarily attributed to the mutual interference of airflow viscosity and the hysteresis effect in the flow field, leading to the formation of a substantial vortex near the wheel. Consequently, the aerodynamic coefficient at each horizontal position becomes inconsistent during the periodic rolling of the vehicle body.

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Section: Numerical Simulation Methodsmentioning

confidence: 99%

The influence of vehicle body roll motion on aerodynamic characteristics under crosswind condition

Taiming,

Ma,

Zhang

et al. 2023

HFF

View full text Add to dashboard Cite

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Study of Buffeting Excitation Acting on Coil Tube Bundles in Cross Flow

Wang,

Guo,

Chen

et al. 2024

Journal of Pressure Vessel Technology

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Although the amplitudes induced by random excitation forces on the tubes are relatively small, the vibrations do cause continuous friction between the tube and supports, which results in gradual failure of the tubes due to fretting wear. Therefore, it is very important to determine the guild lines of the random excitation force spectrum for the coil tube. To the authors&amp;amp;#39; knowledge, there are no published studies on the normalized force spectrum of coil tube. A simplified three-layer experimental model was established. The robustness of the numerical method was demonstrated by comparing the experimental and simulated results, including the vibration response and the fluid excitation force spectrum. And then a semi-empirical equation for predicting the dominant frequency of turbulent buffeting was constructed by employing the threshold envelope method. Through the observation of time history and RMS data, it was found that pitch diameter ratio between adjacent tube layers had the greatest influence on the force coefficients. Pitch diameter ratio in the same layer and helix angle had little effect on the force coefficients. With the increase of a, the flow instability in the shell-side flow enhanced and the fluctuation of force coefficients became larger. Finally, the mechanism of the tube position, Reynolds number and bundle structure on the normalized force spectrum was studied. The normalized envelope force spectrum for coil tube was proposed as the guidelines to predict and evaluate the random excitation force acting on the tubes.

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Detached-eddy simulation of the flow behavior in the shell-side of the coil tube bundle in turbulent flow

Cited by 2 publications

References 40 publications

The influence of vehicle body roll motion on aerodynamic characteristics under crosswind condition

The influence of vehicle body roll motion on aerodynamic characteristics under crosswind condition

Study of Buffeting Excitation Acting on Coil Tube Bundles in Cross Flow

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