高压回流

依据基元容积、高压回流气体流速与噪声产生的关系以及性能价格比的分析，提出了噪声治理的创新结构设计专利。

Through analysis on the relation and performance price ratio of element volume , high-pressure return gas velocity and noise , the creative structural designing patent is proposed to reduce noise .

沿低空急流的重力波传播与高压后部回流冷空气前缘的重力波相交处，冲击力可能很大，飑线正在此处出现。

In the crossing site of the gravity wave along the low jet stream and that of forward sector of back flow , the impulsive force might be very strong , and a Squall line just appeared there .

计算结果表明：渐扩缝隙这种壳体结构的优化设计确实能够削弱甚至避免排气口处高压气体的急剧回流，降低排气过程中的气体动力性噪声。

The numerical results showed that the optimization of the casing structure could indeed weaken and even avoid effectively the backflow eddy at the discharge outlet and reduce power aerodynamic noise . 4 .