空气动力学学报2025，Vol.43Issue(2)：110-120,11.DOI:10.7638/kqdlxxb-2024.0006
预冷器微细管束流动换热的模态分解与快速预测
Modal decomposition and rapid prediction of flow and heat transfer in microtubes of precooler
摘要
Abstract
The precooler is an important component for air cooling in engines,and it can be costly to conduct numerical simulations on the precooler directly.Developing accurate and rapid prediction methods are crucial for the design and condition monitoring of such engines.In this study,based on the numerical simulation of flow and heat transfer in the microtubes of the precooler,a rapid prediction model for flow and heat transfer was established using the back pressure of the precooler outlet as a variable,employing the proper orthogonal decomposition theory and the radial basis function interpolation method.After that,rapid prediction of non-sample operating conditions was conducted.The research shows that the rapid prediction method can obtain the flow and heat transfer information for any non-sample operating condition in less than 1 s and achieve sufficiently high flow field reconstruction/prediction accuracy using only the first 4 modes.Predictions of flow fields such as Mach number,temperature,and total pressure are in good agreement with the numerical simulation results,with a maximum prediction error of no more than 2.3%and the prediction error of outlet total pressure recovery coefficient not exceed 4.8%,confirming the accuracy of the present method.The study also shows that when the pressure of the precooler outlet is very low,there will be a local supersonic zone at the tube outlet,and the prediction error is mainly concentrated in this area.The appearance of the supersonic zone will cause a significant total pressure loss,thus this phenomenon should be avoided as much as possible in the design or operation of the precooler.关键词
预冷器/微细管束/本征正交分解/径向基函数插值/快速预测Key words
precooler/microtubes/proper orthogonal decomposition/radial basis function/rapid prediction引用本文复制引用
马航宇,张文强,苏纬仪,安航..预冷器微细管束流动换热的模态分解与快速预测[J].空气动力学学报,2025,43(2):110-120,11.基金项目
先进航空动力工作站项目(HKCX2020-02-021) （HKCX2020-02-021）
