三维侧压式进气道的减阻研究

为实现三维侧压式进气道的减阻,采用了数值模拟和来流马赫数Ma_0=5.3风洞试验相结合的方法研究了两种三维侧压式进气道,其中之一为基准进气道,其二是在基准进气道的基础上采用某些减阻措施的低阻进气道.结果表明;所采用的减阻措施是有效的,在Ma_0=5.3的条件下,进气道的压差阻力可以减少4.7%左右,摩擦阻力可以减少约4.9%,附加阻力可以转化为附加推力,总阻力可以减少4.7%左右.与此同时,进气道的总体性能也得到明显改善.

Investigation of drag reducing in three-dimensional sidewall inlet

Two sorts of three-dimensional sidewall inlets: standard inlet,and low drag inlet developed by taking some measures of decreasing drag in the standard inlet,had been investigated with methods of wind-tunnel experiments at Ma₀ =5.3 and numerical simulations.The results show that the measure of decreasing drag is effective and pressure drag decreases about 4.7% and friction drag decreases about 4.9% at Ma₀ =5.3;the additive drag can be turned into additive thrust and total drag decreases about 4.7% at Ma₀ =5.3.Here,the collectivity performance is also improved.