Predicting characteristics of infrared radiation of turbofan engine based on overall performance-related design parameters

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2024-11-22 DOI:10.1016/j.ijthermalsci.2024.109560

Feng Wang, Honghu Ji, Xiaojuan Shi

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引用次数: 0

Abstract

In this study, we propose a method to estimate the characteristics of infrared radiation of the exhaust system during the design of a turbofan engine based on the overall design parameters in the context of infrared stealth. We initially establish a model to predict the distribution of the velocity and temperature fields, as well as the concentration of gas inside the cavity of the exhaust system and the plume based on the parameters of temperature and pressure of the inner and outer mixing sections of the culvert. Following this, we develop models to predict the intensity of infrared radiation of the plume perpendicular to the axis of the nozzle (α = 90°) along with the exhaust system along the axis of the nozzle (α = 0°). A comparison between the predictions of the proposed model and the results of numerical calculations showed that the error was no larger than 7 %. Another comparison between the predictions of the proposed model and experimental data showed that the error was little larger than 11 %. The proposed model can thus be used to predict the characteristics of infrared radiation of the turbofan engine in the design stage.

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基于整体性能相关设计参数预测涡扇发动机的红外辐射特性

在本研究中，我们根据红外隐身背景下的总体设计参数，提出了一种在涡扇发动机设计过程中估算排气系统红外辐射特征的方法。我们首先建立了一个模型，根据涵道内外混合段的温度和压力参数，预测排气系统空腔和羽流内部的速度场、温度场以及气体浓度的分布。在此基础上，我们建立了模型来预测垂直于喷嘴轴线（α = 90°）的烟羽和沿喷嘴轴线（α = 0°）的排气系统的红外辐射强度。拟议模型的预测结果与数值计算结果的比较显示，误差不超过 7%。建议模型的预测值与实验数据的另一项比较显示，误差略大于 11%。因此，提出的模型可用于在设计阶段预测涡扇发动机的红外辐射特性。

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 Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.