Abstract Numerical investigation of fluid flow and heat transfer characteristics of a full-scale Infrared suppression (IRS) device for ocean liners is carried out in the present study. The main objective of the work is to reduce the temperature of the turbine exhaust by incorporating the IRS device, which can be effectively used in stealth technology for naval ships. In this study, the IRS device having multiple cylindrical funnels are used for conducting the computational experiment. The numerical solution of the Navier-Stokes equation along with the turbulence as well as the energy equation is solved using the algebraic multigrid solver of ANSYS Fluent 15.0. Many pertinent input parameters, like the inlet Reynolds number, fluid temperature, the number of funnels, and their sizes with overlapping or without it, have been varied in a practical range to study the mass suction into the IRS device. It is observed that the mass entrainment increases with an increase in the nozzle fluid temperature as well as its velocity. Visualization of temperature plume and flow field over the IRS device with multiple funnels has been picturized in this analysis. Furthermore, correlations for the prediction of mass entrainment rate as a function of pertinent input parameters have been developed, which can be used for academic and industrial purposes.

中文翻译：

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圆柱形漏斗全尺寸红外抑制装置流动和传热特性的数值研究

摘要 本研究对远洋班轮全尺寸红外抑制（IRS）装置的流体流动和传热特性进行了数值研究。这项工作的主要目标是通过结合 IRS 装置来降低涡轮排气的温度，该装置可以有效地用于海军舰艇的隐身技术。在这项研究中，具有多个圆柱形漏斗的 IRS 设备用于进行计算实验。使用 ANSYS Fluent 15.0 的代数多重网格求解器求解 Navier-Stokes 方程以及湍流和能量方程的数值解。许多相关的输入参数，如入口雷诺数、流体温度、漏斗数及其大小（重叠或不重叠），已经在实际范围内变化以研究进入 IRS 装置的质量吸入。观察到质量夹带随着喷嘴流体温度及其速度的增加而增加。在此分析中，已对带有多个漏斗的 IRS 设备上的温度羽流和流场进行了可视化。此外，已经开发了预测质量夹带率作为相关输入参数的函数的相关性，可用于学术和工业目的。