论文部分内容阅读
针对现有大气密度探测方法的精度低、成本高、时空一致性差等不足,提出基于高超声速再入圆球的临近空间大气密度探测方法。根据再入运动方程沿弹道迭代计算大气密度值。仿真结果表明,该方法可测得高度90 km以下的大气密度,测量精度在6%以内。对带有偏心配重块的圆球建立沿弹道的六自由度运动分析模型,结合气动力热数值模拟确定了双天线罩布局方案;并进一步对带双天线罩的偏心圆球实现了沿弹道的热传导数值计算,提出热防护方案,证明了探测方案的可行性。提出的大气密度测量方法可以为建立临近空间高精度大气密度模型提供参考。
Aiming at the shortcomings of low accuracy, high cost and poor consistency of time and space in the existing methods of detecting atmospheric density, a method for detecting the density of nearby air based on hypersonic reentry sphere is proposed. Atmospheric density along trajectory iteration calculation based on reentry equations. The simulation results show that the method can measure the atmospheric density below 90 km and the accuracy is within 6%. A six-degree-of-freedom (MDOF) motion analysis model along the ballistic path was established for the ball with eccentric weights. The aerodynamic thermal numerical simulation was used to determine the layout scheme of the two-wire radome. The eccentric spherical ball with double radome Heat conduction numerical calculation, puts forward the heat protection scheme, proves the feasibility of the exploration scheme. The proposed method of atmospheric density measurement can provide a reference for establishing a high-precision atmospheric density model in the near space.