1. The optimum design of Controlled Diffusion Airfoils (CDA) is one of the main research fields in subsonic and transonic profile design for multistage compressor. 可控扩散叶型（CDA）的优化设计是目前国外对亚音、跨音速压气机叶型研究的主要内容之一。
2. An air-breathing valveless PDE model was designed and manufactured, which was made up of subsonic inlet, mixing chamber, ignition chamber, detonation chamber and nozzle. 设计制造了完整的吸气式无阀脉冲爆震模型机，包括亚声速进气道，混合室，点火室，爆震室和喷管。
3. Considering the structure characters (large offset and short diffuser) of missile inlet, a design method of the S shaped inlets for a high subsonic missiles is presented. 针对导弹进气道的结构特点，在前人的工作基础上总结出一种适合导弹使用的大偏距、短扩压S弯进气道的设计方法。
英英解释
adj.
1. (of speed) less than that of sound in a designated medium
