带预压缩性质的高马赫数内转式进气道设计

摘要

The traditional basic axisymmetric flowfield has two problems:1) the internal contraction of inlet is big and the starting performance is bad; 2) the total pressure loss of leading edge curved shock is very high when it is close to the center body. For the above-mentioned problems, a new basic axisymmetric flow-field is designed, which has two weak shocks instead of the intensive shock. The new design makes the total pressure recovery coefficient of inlet throat great increased. The numerical simulation results show that the inward-turning inlet based on the new flowfield has a higher throat total pressure recovery coefficient, but it has still some problems to be investigated, such as the higher contraction rate and severe spillage.%传统的轴对称基准流场存在两个问题：进气道内收缩比较大，起动性能差；前缘弯曲激波在靠近中心体附近剧烈弯曲，激波损失很大，极有可能造成唇口激波脱体。为此，设计了新型的轴对称基准流场，把较强的前缘激波设计为两道较弱的预压缩激波，显著提高了进气道喉道的总压恢复系数。模拟结果表明，基于新型轴对称基准流场设计的内转式进气道性能优良，但存在溢流较严重等问题，还需进一步研究。