Reliability test in pressure measuement of detonation combustor

To improve the reliability of pressure measurement in detonation combustor of pulse detonation engine(PDE), the pressure/time curves of detonation were measured at single detonation and multicycle detonation, respectively, by using a dynamic pressure measurement system.The experimental study at single detonation reveals that, if the length of branch tube is less than 100mm, the peak value of detonation pressure can be measured;if the length of tube is more than 150mm, the flame cannot propagate within the branch tube, and only platform pressure after detonation could be measured.For multicycle detonation, if the length of cooling tube is short enough, the detonation pressure can be measured.The research results resolve the reliability problem of pressure measurement on multicycle detonation.