激光重复频率对减小高超声速飞行器波阻的影响研究  

Research of the Influence of Repetitive-rate of Laser Energy Reducing Wave Drag for Hypersonic Craft

作　　者：王金霞 洪延姬 李倩 王殿恺 

机构地区：[1]装备学院研究生管理大队,北京101416 [2]装备学院激光推进及其应用国家重点实验室,北京101416

出　　处：《科学技术与工程》2013年第23期6956-6959,共4页Science Technology and Engineering

基　　金：自然科学基金(90916015;91116010)资助

摘　　要：以激光能量沉积的方式对高超声速飞行器头部周围流场主动流动控制是减小高超声速飞行器阻力一种重要方法。通过研究在单脉冲能量均为0.005 J的情况下,重复频率f=10～1 500 kHz的多种脉冲频率下的减阻效果,得出了结论:重复频率低于400 kHz时,随着重复频率的增加,减阻率逐渐增加且增加较快;400～1 000 kHz时,增加变缓;重复频率大于1 000kHz时,减阻率趋于极限65.6%。重复频率低于150 kHz时,随着重复频率的增加,能量沉积效率逐渐增大;当重复频率高于150 kHz时,随着重复频率的增加,能量沉积效率趋于0。随着重复频率的增加,阻力震荡减小。Laser energy deposition is an effective way in reducing the wave drag of the supersonic craft by controlling the flow filed around the head.From the relevant researches the high-frequency repetitive laser energy deposition can reduce the wave drag of craft effectively is known.Based on the the condition of the single pluse energy is 0.005 J,and the frequence chosed 10 ～ 1 500 kHz,use numeric numerical,the conclusion is that when the single pulse energy is a constant,the drag reduction rate is increase with the repetitive-rate,and when the repetitiverate is higher than 1 000 kHz,the increation accross to a limit at 65.5%.When the repetitive-rate is lower than 150 kHz,the energy deposition efficiency is also increase with the repetitive-rate.But when the repetitive-rate is higher than 150 kHz,the energy deposition efficiency is decrease with the repetitive-rate.As the pulse frequency increases,the drag shake become weakly.

关 键 词：高超声速 激光能量沉积 重复频率 减阻 

分 类 号：V211.4[航空宇航科学与技术—航空宇航推进理论与工程]