Abstract: In order to study the effect of equivalent ratio on two-phase rotating detonation wave of kerosene/air，the two-dimensional numerical simulations of liquid kerosene at normal temperature as fuel and high total temperature air as oxidant are carried out based on the Eulerian-Lagrange method. The two-phase rotating detonation flow fields under different equivalent ratios are calculated by controlling the kerosene inflow，and the effect of equivalent ratio on flow field structure，propagation characteristics and thrust performance is analyzed. The results show that the height of detonation front decreases with the increase in the equivalent ratio in the range of a certain equivalent ratio. The velocity deficit generally increases with the increase in the equivalent ratio when the equivalent ratio is greater than 0.6，with a range of 7.1%~17.2%. Fuel loss occurs when the equivalent ratio is greater than 0.8，and increases approximately linearly with the increase in the equivalent ratio，which is up to 51% when the equivalent ratio is 2.0. With the increase in the equivalent ratio，the specific impulse decreases，and the specific thrust increases first and then decreases，and reaches the maximum when the equivalent ratio is 1.5，the variation ranges of specific impulse and specific thrust are 1 154.3~3 912.4 s and 1 226.8~ 1 521.8 N·s/kg，respectively.

Key words: rotatingdetonationwave, kerosene/airtwo-phase, equivalentratio, Euler-Lagrangemethod