Numerical study of performance of flat and perforated radiant heat shields for offshore structures

IF 2.3 3区工程技术 Q2 ENGINEERING, MARINE

International Journal of Naval Architecture and Ocean Engineering Pub Date : 2023-01-01 DOI:10.1016/j.ijnaoe.2022.100491

Gang Nam Lee , Kwang Hyo Jung , Hyung Jun Kim , Bong Ju Kim , Dae Kyeom Park , Il-Ryong Park

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引用次数: 0

Abstract

Heat shields are an essential safety facility on offshore structures to protect the workers and the equipment on deck from the violent radiant heat flux and the high temperatures of the flare tower. In this study, a series of Computational Fluid Dynamics (CFD) simulations were performed to investigate the thermal characteristics of radiant heat shields on offshore structures in order to obtain a precise prediction of those reduction performances on heat flux and temperature. CFD methodologies for the radiant heat transfer simulation were suggested for grid, iteration, and time step with physical modelling methods of heat transfer considering the convection effect and the heat flux sensor, including the scaling method for the simulation of a perforated heat shield. The reduction ratios of the heat flux and temperature were obtained for the case without the heat shield and for a flat and perforated heat shield under the heat source of 25 kW/m² for various distances from the heat shield, and the results were compared with the experimental results. Analytical estimation methods were included in the study of the radiant heat flux and temperature, and an empirical formula was provided for the performance of the heat shields based on the CFD results.

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海上结构用平板和穿孔辐射隔热板性能的数值研究

防热罩是海上建筑必不可少的安全设施，可以保护甲板上的工作人员和设备免受强烈的辐射热通量和火炬塔的高温的影响。本文通过计算流体力学(CFD)模拟研究了海洋结构上辐射隔热板的热特性，以精确预测其热流密度和温度的降低性能。提出了基于网格、迭代和时间步长的辐射传热模拟CFD方法，并采用考虑对流效应和热流通量传感器的传热物理建模方法，包括穿孔隔热板模拟的标度法。在热源为25 kW/m2时，计算了无隔热板情况和有平面和穿孔隔热板情况下，距离隔热板不同距离下的热流密度和温度的折减比，并与实验结果进行了比较。在辐射热流密度和温度的研究中引入了解析估算方法，并基于CFD结果给出了隔热板性能的经验公式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Naval Architecture and Ocean Engineering ENGINEERING, MARINE-

CiteScore

4.90

自引率

4.50%

发文量

审稿时长

12 months

期刊介绍： International Journal of Naval Architecture and Ocean Engineering provides a forum for engineers and scientists from a wide range of disciplines to present and discuss various phenomena in the utilization and preservation of ocean environment. Without being limited by the traditional categorization, it is encouraged to present advanced technology development and scientific research, as long as they are aimed for more and better human engagement with ocean environment. Topics include, but not limited to: marine hydrodynamics; structural mechanics; marine propulsion system; design methodology & practice; production technology; system dynamics & control; marine equipment technology; materials science; underwater acoustics; ocean remote sensing; and information technology related to ship and marine systems; ocean energy systems; marine environmental engineering; maritime safety engineering; polar & arctic engineering; coastal & port engineering; subsea engineering; and specialized watercraft engineering.