摘要
利用基于多循环吸气式脉冲爆震发动机的实验获得了沿爆震室轴向9个位置的实时压力数据,经过对数据进行时域和频域的分析处理后,利用MATLAB软件的GRIDDATA函数拟合出了6个工作频率下某个循环时爆震室内压力随轴向位置及时间变化的三维图形。通过对拟合后的数据从不同角度进行分析,发现采用爆燃向爆震转捩(DDT)方式起爆会在爆震波形成前生成一个局部爆轰区、爆震波形成后平均速度维持在1000m/s左右,且峰值压力升高、随机性增大。该实验的研究结果为爆震室的结构强度研究提供了依据。
Based on the multi-cycle air-breathing pulse detonation engine experiments, real- time pressure data from 9 positions along the detonation combustor axial have been obtained. After analysis of the data from time domain and frequency domain, curved surfaces of pressure with axial location and time of a cycle working in 6 frequencies have been fitted by using MATLAB software GRIDDATA function. Analyzing the fitted data from different perspectives, we find that using DDT initiation will generate a local high-pressure region before the detonation wave, after the detonation wave generation the average speed of detonation wave maintained at about 1000m/s, and its peak pressure and randomness increase. The experimental conclusions provide a foundation to study the structure and strength of the detonation combustor.
出处
《实验流体力学》
CAS
CSCD
北大核心
2013年第3期41-46,共6页
Journal of Experiments in Fluid Mechanics
关键词
脉冲爆震发动机
多循环
爆震室
内部压力
pulse detonation engine
multi-cycle
detonation combustor
internal pressure
