亚速

结果表明，渗氮过程受循环参数控制，渗层组织呈层状结构，渗层生长曲线存在长达6h的亚速线性段；在强渗工艺下，该段斜率明显增大。

The results show that the nitriding process was controlled by cycle parameters , the nitrided structure presented as-layer construction and there was a liner section to grow with a secondary speed in 6h along the growth plot for nitrided case .

对于钝头弹侵彻，靶板的破损形式和侵彻机理，随弹速的变化而不同。当弹速处于亚弹速范围时，弹头都保持了完好，此时弹体也视为刚性弹。

The failure models and penetration mechanism vary with the projectile velocity .

研究了刚性尖头弹以弹速或亚弹速垂直撞击有限厚度塑性金属靶板的侵彻问题。

Based on this approximation , a new engineering model was developed for analysis on penetration into finite thickness metallic plates by rigid sharp-nosed projectiles .

亚、超声速旋涡流动特征的定性分析研究

Analytical Analysis of Subsonic and Supersonic Vortex Motion

柴油在亚、超声速气流中横向喷射实验研究

Experimental Study on the Unsteady Transverse Injection of Diesel into a Subsonic and Supersonic Flow

本文结果还表明：燃料物性参数对亚、超声速气流中射流柱的破碎和雾化特征以及激波结构的影响不大。

The results also show that the fuel properties have less effect on jet breakup , atomization and shock wave structure in sub and supersonic flow .

在灰尘负荷率相同，微粒速度相近条件下完成激波管2e区实验气流分别为亚声速与超声速的实验。

The experiments with same dusty loading rate and with close particle velocities were performed at both subsonic and supersonic flowfield , respectively .

一维线性链的亚声速和超声速孤立子

Subsonic and supersonic solitons in one dimensional linear chains

此外，不论是亚声速还是超声速飞行，气动操纵面均可以提高气动效率5%&6%。

The suggested surface can increase the aerodynamic efficiency ( lift-to-drag ratio ) of the baseline configuration by 5 % & 6 % in subsonic and supersonic flight regimes .

自五十年代以来，对亚声速及超声速喷注噪声有大量的研究工作，但对阻塞喷注的湍流噪声研究甚少。

Ever since the fifties , profound theoretical and experimental investigations were spent on the noise production of subsonic and supersonic jets , but little has been done on the turbulent noise of a choked jet .

通过使用动网格技术得到了导弹离机过程的六自由度运动参数，对内埋式导弹在亚声速和超声速条件下的分离轨迹和姿态变化进行了比较分析，得出了导弹安全分离的条件。

The dynamic mesh technique was used to obtain the parameters of the 6 DOF movement . Compared the separation trajectory and missile posture change at subsonic speed and supersonic speed . Finally , got missile safe separation conditions .