摘要
静音锥低声爆是通过在超声速飞机头部加装静音锥将机头产生的强激波转化为一系列互不叠加的弱激波,从而降低声爆。以一种"梭式"布局的超声速客机为基本模型,采用计算流体力学和波形参数法相结合的方法,研究不同参数的单级和多级静音锥对超声速客机声爆水平的影响。结果表明:静音锥的长度可以调节激波的干涉程度;静音锥的直径和圆锥顶角可以改变静音锥的初始超压值;静音锥级数对上升时间影响显著。
The Quiet Spike is a telescoping forward fuselage extension that alters the bow shock of the classic N- wave pressure signature generated by aircraft travelling at supersonic speed. The how shock is broken up into sequence of weak shocks to reduce sonic boom. Supersonic airliner of the "shuttle" layout is analyzed. Based on CFD(Computerized Fluid Dynamics) and waveform parameter method, different geometrical parameters of multi-segment quiet spikes are studied. The results shows that length of quiet spike can regulate the interference degree of the shock wave, diameter and vertex angle can decide the initial pressure of the quiet spike,the seg- ment makes a significant influence on the rising time.
出处
《航空工程进展》
2013年第3期346-351,357,共7页
Advances in Aeronautical Science and Engineering
作者简介
通信作者:李占科,lzk@nwpu.edu.cn李占科(1973-),男,博士,副教授。主要研究方向:飞行器总体设计、结构设计等。
彭中良(1980-),男,硕士研究生。主要研究方向:超声速客机总体设计。
徐合良(1988-),男,硕士研究生。主要研究方向:飞行器结构设计。