当量比对煤油-空气两相旋转爆轰波的影响

为研究当量比对煤油-空气两相旋转爆轰波的影响，基于欧拉-拉格朗日方法，以常温液态煤油为燃料、高总温空气为氧化剂开展二维数值模拟。通过控制进油量计算不同当量比下的两相旋转爆轰流场，分析当量比对流场结构、传播特性和推力性能的影响。分析结果表明：在一定的当量比范围内，爆轰波波头高度随着当量比的增大而减小；当量比大于0.6时，速度亏损随着当量比的增大总体呈现增加的趋势，变化范围为7.1%~17.2%；当量比大于0.8时产生燃料损失，燃料损失随当量比的增大呈近似线性增加，当量比为2.0时最大为51%；随着当量比的增大，比冲减小，比推力先增大后减小并在当量比为1.5时达到最大值，比冲和比推力的变化范围分别为1 154.3~ 3 912.4 s和1 226.8~1 521.8 N·s/kg。

Effect of Equivalent Ratio on Two-phase Rotating Detonation Wave of Kerosene-air

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.