The laminar burning velocity and Markstein length of n-tetradecane/air mixture were obtained under initial pressure of 0.1 MPa

initial temperatures of 420

450 K and 480 K within a wide equivalence ratio range from 0.8 to 1.4 in a constant volume chamber

and the effects of initial temperature and equivalence ratio were analyzed. The results showed that the increase of initial temperature and equivalence ratio had little effect on the stability of the flame propagation images. Under the initial temperature of 480 K and equivalence ratio of 1.3

there was no crack or cellular structure in the flame. The effect that the increase of initial temperature can increase the flame propagation speed and promote the formation of flame front was observed

which was more significant in the lean mixture. With the increase of equivalence ratio

the Markstein length of n-tetradecane/air mixture decreased and the flame stability became worse. With the increase of temperature

the Markstein length decreased

and the unstretched flame speed and laminar burning velocity increased. In addition

compared with the laminar burning velocity of RP-3 kerosene

the laminar burning velocity of n-tetradecane was higher under most conditions.