超声速锥-柱-裙不同燃气喷流侧喷干扰效应

Interference Effects of Different Combustion Gas Lateral Jets on Supersonic Cone-Cylinder-Flare

通过求解三维RANS方程研究了锥-柱-裙外形不同推进剂燃气的侧喷干扰效应。利用超声速条件下的热喷干扰实验结果验证了数值方法的可靠性。数值模拟了不同燃气喷流的侧喷干扰流场,对比了干扰流场的壁面压差系数分布、力干扰因子和轨控偏移量。研究表明:在所设定风洞来流温度条件下,可以忽略二次燃烧的影响;不发生化学反应的条件下,喷流温度下降,轨控偏移量减小,且在负迎角条件下减小量值更大,对于相同静温的不同燃气喷流,壁面压差系数分布、力干扰因子与轨控偏移量差别很小;二次燃烧对不同燃气喷流干扰效应的影响规律一致,影响量值接近,在大部分迎角条件下,二次燃烧使轨控偏移量减小,且在负迎角条件下的减小量值更大。

The study investigates the side-jet interference effects of different propellant gases on a Cone-Cylinder-Flare shape by solving the three-dimensional RANS equations.The reliability of the numerical method was validated using the results of hot jet interference experiments under supersonic conditions.The numerical simulations modeled the side-jet interference flow fields of different gas jet interference flow fields,comparing the distribution of wall pressure difference coefficients,force interference factors,and shift value of jet force center.The research indicates that under the wind tunnel inflow temperature conditions of this paper,the influence of afterburning can be neglected.Without chemical reactions,as the jet temperature decreases,the shift value of jet force center decreases,and the reduction is more significant under negative angle of attack conditions.For the different combustion gas jets with same static temperature,the distribution of wall pressure difference coefficients,force interference factors,and shift value of jet force center show little difference.The influence of afterburning on the interference effects of different gas jets is consistent,with the magnitude of influence being close.Under most angle of attack conditions,afterburning reduces the magnitude of the shift value of jet force center,and the reduction is greater under negative attack angle.