论文部分内容阅读
提出了一种前后缘型线同时可控的乘波体设计方法,在马赫数可控的外锥形曲面基准流场中,结合流线追踪技术和混合函数,实现了椭圆前缘转椭圆后缘的乘波体设计,并在设计点(Ma=6.0)和接力点(Ma=4.0)对其进行数值仿真研究。前后缘同时可控的乘波体在型面剧烈过渡处产生了较弱的激波,出口两侧存在高温高压区,后部对称面附近的激波形状由圆弧变为平直线且出口处流场基本均匀,非常有利于与进气道匹配设计。另外,该乘波体具有较高的容积率和预压缩效率,附面层修正后的容积率为0.24,设计点时乘波特性较好,接力点时前部完全乘波,具有较高的升阻比,有黏条件下设计点和接力点的升阻比分别为2.54和2.41。此外,与给定前缘的乘波体相比,其升力、阻力、俯仰力矩和出口增压比都有明显增加,但是升阻比和出口总压恢复系数有所降低,在设计点无黏升阻比由3.56降为3.00。以上研究表明,本文的设计方法可行且更加灵活,拓宽了乘波体的选择范围。
A method for simultaneous and controllable multiplier body design of front and rear edge lines is proposed. Based on the machined reference flow field with Mach number control, combined with streamline tracing technique and hybrid function, Edge by the wave body design, and in the design point (Ma = 6.0) and the relay point (Ma = 4.0) numerical simulation study. The front and rear edge of the controllable multiplier body produced a weak shock at the violent transition of the profile. The high temperature and high pressure region existed on both sides of the outlet. The shape of the shock near the rear symmetry plane changed from circular arc to flat line and the outlet Flow field is basically uniform, very conducive to match with the inlet design. In addition, the multiplication body has higher volumetric rate and pre-compression efficiency. The modified volume ratio of the topcoat is 0.24, the multiplicative wave characteristics at the design point are good, and the front part is fully multiplied by the wave when the relay point is high Of the resistance ratio, with the sticky conditions, the design point and the relay point of resistance ratio were 2.54 and 2.41. In addition, the lift, drag, pitching moment and outlet pressurization ratio are significantly increased compared with the multiplied wave body given the leading edge, but the lift-drag ratio and the outlet total pressure recovery coefficient are reduced. At the design point, there is no stickiness The resistance ratio is reduced from 3.56 to 3.00. The above studies show that the design method of this paper is feasible and more flexible, broadening the range of choice of multiplicator.