摘要
分析了两相多循环脉冲爆震发动机工作过程中爆震室内、外壁换热特性,建立了爆震室壁温分布计算模型。采用ANSYS的瞬态热分析模块,对一脉冲爆震发动机模型机在不同工作频率下,内、外壁若干位置处温度随时间的变化规律进行数值模拟。研究发现,脉冲爆震发动机(PDE)外壁面温度随工作时间的增加连续升高,内壁面温度振荡上升,但两者的变化规律基本相同;内、外壁温度分布存在一个热平衡时间,该时间随爆震频率的升高而减小;热平衡时刻,外壁面温度分布呈现从前到后逐渐升高的趋势;同一轴向位置处,外壁面温度的平衡值随爆震频率的升高而升高,但升高幅度随爆震频率的增加而略有减小。
The heat transfer characteristics of the detonation chamber＇s outer and inner wall were analyzed when the pulse detonation engine model was operated in the multi-cycle mode. A model was established to calculate the detonation chamber＇s wall temperature distribution. By using of the ANSYS/transient thermal analysis module, the time histories of detonation chamber＇s outer/ inner wall temperature were numerical simulated in different detonation frequencies and locations. It was found that the outer wall temperature increases continuously along with the operation time, which the inner wall temperature increases oscillating at the same time, but the increasing trends of both are the same; There is a thermal equilibrium time. After this time, the temperature of inner and outer wall doesn＇t increase along with the increase of operation time. The equilibrium time decreases as the engine frequency increase; At the thermal equilibrium time, from head to aft of the detonation chamber, the outer wall temperature takes on a gradually increasing trend. At the same axial location, the equilibrium temperature of the outer wall increases as the detonation frequency increases, but the increasing extent decreases along with the increase of the detonation frequency.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2007年第5期414-420,共7页
Journal of Combustion Science and Technology
基金
国家自然科学基金(50336030/E0604)
关键词
脉冲爆震发动机
多循环
爆震燃烧室
温度分布
数值模拟
pulse detonation engine
multi-cycle
detonation chamber
temperature distribution
numerical simulation
作者简介
郑龙席（1970-），男，博士，副教授.通讯作者：郑龙席，zhenglx@nwpu．edu．cn.．
