航空学报2025，Vol.46Issue(15)：55-69,15.DOI:10.7527/S1000-6893.2024.31104
三维并联涡轮基组合循环排气系统设计与性能分析
Design and performance analysis of a three-dimensional TBCC exhaust system
摘要
Abstract
Based on the axisymmetric flowfield with optimal thrust under geometric constraints,a circular-to rectangu-lar three-dimensional single expansion ramp nozzle is designed by using the streamline tracing method,and trimming the configuration of nozzle to improve the aerodynamic performance and reduce the weight of the nozzle.On this ba-sis,the adjustment programme for changing geometry of the turbojet flowpath is achieved by using the rotating ramp rotation around the ramp endpoint to complete the design of the exhaust system.Subsequently,the wall pressure dis-tribution and schlieren image of the exhaust system are obtained through cold flow experiments,and the detailed flow field characteristics and performance parameters are obtained through numerical simulations.The results show that the schlieren image and pressure distributions of the wall under each operating condition are in good agreement with the numerical simulation results;when the turbojet works alone,the structure of the exhaust jet is relatively simple,and there will be a shock train structure under the low Nozzle Pressure Ratio(NPR).In parallel operation,the two flowpath interfere with each other;in separate operation of ramjet,the airflow expands smoothly in the three-dimensional flow path.The thrust performance of the exhaust system deteriorates slightly in the turbine and ramjet co-operating condition,but the thrust coefficient is above 0.924 in the whole working envelope,and the thrust perfor-mance changes smoothly.This study provides a new effective solution for the TBCC exhaust system.关键词
涡轮基组合循环(TBCC)/排气系统设计/三维喷管/冷态实验/双向流线追踪Key words
turbine based combined cycle(TBCC)/design of exhaust system/three-dimensional(3-D)nozzle/cold flow experiment/streamline tracing分类
航空航天引用本文复制引用
丁海鹏,吕郑,田轲,叶涛,陈匡世,徐惊雷..三维并联涡轮基组合循环排气系统设计与性能分析[J].航空学报,2025,46(15):55-69,15.基金项目
中央高校基本科研业务费(NS2023008) （NS2023008）
江苏省自然科学基金(BK20241367) （BK20241367）
1912项目(2019-JCJQ-DA-001-072,2019-JCJQ-DA-001-073,2019-JCJQ-DA-001-141) （2019-JCJQ-DA-001-072,2019-JCJQ-DA-001-073,2019-JCJQ-DA-001-141）
国家自然科学基金(12332018) Fundamental Research Funds for the Central Universities(NS2023008) （12332018）
Natural Science Foundation of Jiangsu Province(BK20241367) （BK20241367）
Project 1912(2019-JCJQ-DA-001-072,2019-JCJQ-DA-001-073.2019-JCJQ-DA-001-141) （2019-JCJQ-DA-001-072,2019-JCJQ-DA-001-073.2019-JCJQ-DA-001-141）
National Natural Science Foundation of China(12332018) （12332018）
