飞行环境对火箭喷焰微波衰减特性的影响

本文采用一种近场和远场分区耦合、时间相关法和空间推进法相结合的方法计算分析了飞行环境对火箭喷焰微波衰减特性的影响。计算结果表明高空飞行时的喷焰温度低于地面环境下的喷焰温度。但是,由于市容工环境压力的降低使得喷焰的复合效应减弱导致自由电子数密度沿喷焰轴向衰减减慢,使得高空飞行时喷焰对微波的有效作用范围增大。由此可以推断实际飞行时喷焰的微波衰减比在地面环境时更为严重。

Effects of Flight Condition on Microwave Attenuation Characteristics of Rocket Plume

Effects of flight condition on the microwave attenuation characteristics of rocket plume are investigated with a near-far field divided-coupled approach,which integrates time-dependent method with spatial-marching method.The results show that the temperature of the plume in the flight condition is lower than that in the ground tests,but the free electron number density decays more slowly along the down stream of the plume axis and the effective range of plume increases in-flight condition,this due to the reduction of compound effect which results from the altitude pressure decrease.The results show that the attenuation characteristics of rocket plume in-flight condition are more serious than that in the ground condition.