摘要
针对微型燃气轮机机组中燃烧室总压损失较高的问题,利用ANSYS Fluent软件对火焰筒内部的流场和温度场进行了数值模拟研究,分析了增大火焰筒旋流器及射流孔的流通面积前后,火焰筒内轴向速度、切向速度、回流区、壁面温度和出口温度分布等的变化规律。结果表明:同时增大旋流器、主燃孔和掺混孔的流通面积,分别增大21%、40%和44%,总压损失由6. 34%降至3. 97%,但会引起火焰筒内回流区范围减小,掺混效果降低和燃烧不稳定等问题。
The total pressure loss of the micro gas turbine increases when regenerator is added. The internal flow field and temperature field of the different flame tube are simulated by ANSYS Fluent. The flow areas of the jet holes and swirler of different combustors are different. The effects of increasing the flow area on the following are studied: the formation of recirculation zone,profile of axial velocity and tangential velocity,combustion characteristics,distribution of wall temperature and turbine inlet temperature.The simulation results show that the total pressure decreases from 6. 34% to 3. 97% when the flow area of swirler,secondary holes,and dilution air holes are increased by 21%,40% and 44% at the same time.However,the increase in flow area leads to the reduction of the flow recirculation,and the depravation of mixing effect and combustion instability.
作者
吕亚亚
宗超
朱彤
马雨晨
LYU Ya-ya;ZONG Chao;ZHU Tong;MA Yu-chen(School of Mechanical Engineering,Tongji University,Shanghai,China,Post Code :201804)
出处
《热能动力工程》
CAS
CSCD
北大核心
2019年第2期54-62,共9页
Journal of Engineering for Thermal Energy and Power
基金
上海市科学技术委员会科研计划课题(15DZ1207202)~~
关键词
微型燃气轮机
总压损失
流场
燃烧
数值模拟
micro gas turbine
total pressure loss
flow field
combustion
numerical simulation
