In order to investigate the effects of fuel distribution on the operation of two-phase pulse detonation engine (PDE), a series of cold\nflow and multicycle PDE experiments was carried out with 9 mixing schemes. Homogeneity degree with fuel distribution\nconsidered in terms of space and time was proposed to quantitatively evaluate the mixing of liquid fuel and air by particle image\nvelocimetry (PIV) in cold flow experiments. Operation stability of multicycle PDE was presented by statistical analysis of peak\npressure at the outlet of a detonation tube. The relationship between operation stability and homogeneity degree was\nquantitatively elaborated. These experimental results indicated that not only using mixing reinforcement devices (such as pore\nplate and reed valve) was fuel distribution improved but also the effect of inlet ways on the homogeneity degree was weakened.
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