Optimization for aerodynamic performance of double serpentine nozzles with spanwise offsets using Taguchi-based CFD analysis

作     者：Xuyong ZHANG Yong SHAN Jingzhou ZHANG Zhongcheng WU Xuyong ZHANG;Yong SHAN;Jingzhou ZHANG;Zhongcheng WU

作者机构：College of Energy and Power EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2023年第36卷第5期

页      面：1-17页

核心收录：

学科分类：080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Science and Technology Major Project of China(No.J2019-III-0009-0053) 

主　　题：Aerodynamics Analysis of Variance(ANOVA) Computational Fluid Dynamics(CFD) Double serpentine nozzle Spanwise offset Taguchi methods 

摘      要：Serpentine nozzles are widely used in combat aircraft to realize strong stealth *** on the layout characteristics within a confined space,a series of double serpentine nozzles with spanwise offsets are *** computational fluid dynamics and Taguchi method,the influence mechanisms of the Distribution of Area(DA),Distributions of Centerline for the first and second‘S’sections in the Vertical direction(DCV1 and DCV2),and Distribution of Centerline in the Spanwise direction(DCS)are *** impact of these factors on the total pressure recovery coefficient can be ranked as DADCV2DCSDCV1,whereas their impacts on the discharge coefficient and axial thrust coefficient can be ranked as DCV2DCSDA*** the statistical significance of these factors,a nozzle in which DA changes rapidly at the exit and DCV1,DCV2,and DCS change rapidly at the entrance gives the best aerodynamic *** to the worst configuration,the total pressure recovery coefficient,discharge coefficient,and axial thrust coefficient are improved by 1.6%,3.5%and 3.6%,*** influences the gas flow acceleration in the entire serpentine channel,resulting in different wall shear stress and friction *** various centerline distributions influence the gas flow acceleration effects and form complex wave structures in the constantarea extension section,resulting in different local and friction losses.