In order to study propagating characteristics and self-sustaining mechanism of detonation wave influenced by lateral expansion

the influences of different equivalent ratios(0.70-2.25) and different premixed gas heights(1

2

3cm) on the self-sustaining propagation of detonation wave were researched in the test section.It was found that if the premixed gas height is higher and premixed gas activity is stronger

the ability of detonation wave resisting the influence of lateral expansion is stronger and velocity deficits is smaller.Based on Fay's fluid expansion theory

Dabora and Murray's velocity deficits theory and Zeldovich-von Neamann-Döring(ZND)model

the shock wave angle

interface angle and velocity deficits of detonation wave by lateral expansion can be predicted theoretically

proving that experiment is in good agreement with theoretical prediction with Dabora's theory.In order to keep self-sustaining propagation of detonation wave influenced by lateral expansion

the velocity deficit limitation of detonation wave is 7.0%-11.0%.