三级旋流杯燃烧室流场测量与数值模拟

PIV measurement and numerical simulation of the flow field in triple-stage swirler cup combustor

中文关键词: 航空发动机  燃烧室  三级旋流杯  PIV  数值模拟

英文关键词: aero-engine  triple-stage swirler cup  combustor  PIV experiment  numerical simulation

中文摘要:

      为满足高温升高热负荷燃烧室头部设计要求,参照旋流器设计准则,设计4种不同三级旋流杯燃烧室,采用数值模拟和PIV试验相结合方法对其冷态流场进行初步研究,其研究结果表明：第3级旋流器叶片安装角增加,火焰筒头部旋流特性更显著,回流区直径增大,有利于火焰稳定；同时主燃孔射流深度增加,有利于截断火焰。第3级旋流器叶片数增加,主流速度衰减加快,气动损失增大,使火焰筒头部进气量减少,同时削弱三级旋流杯出口气流旋转强度,火焰筒头部回流区直径减小,不利于燃烧。

英文摘要:

      Four groups of triple-stage swirler cup combuster were designed to meet the high temperature rising requirement of combustor head with high load. PIV experiment and numerical simulation were performed to study the flow field inside the combuster.The results showed that the increasing third swirler blade installation angle can enhance the flame tube head swirler characteristics with larger recirculation zone''s diameter and stable flame. However, when the amount of third swirler blade was increasing,the velocity degraded rapidly and the aerodynamic loss was increasing,which decreased air input and recirculation strengthen at air outlet.Therefore,the recirculation zone''s diameter was smaller,which was not beneficial for flame.