音速

Using this method, the DSMC program is developed to simulate flows in transitional region around a sphere double cone and Apollo capsule, and the aerodynamic and thermal characteristics around the supersonic and hypersonic vehicles is investigated.

在此基础上建立了一套DSMC数值模拟程序，对球双锥和Apollo飞船在过渡区域流动进行了数值模拟，并分析了其过渡区域超音速、高超音速的气动力、气动热等问题。

Eight sets of nozzle have been calibrated, its limit error is within ±0.2%.

通过对八套音速喷咀的标定，其极限误差在±0.2%以内。

Time is advanced by an implicit Gauss-Seidel relaxation procedure which is constructed by the first order linearizing of flux vector and the maximal eigenvalue splitting of flux Jacobi matrix.

为了验证本文方法的计算精度和鲁棒性，对NACA0012翼型低速流动、RAE2822翼型跨音速绕流和二维圆柱的分离流动进行了数值模拟。

Supersonic flow ; hypersonic flow ; finite element methods ; quasi-parabolic Navier-Stokes equations ; Galerkin/Least-squares

超音速流；高超音速流；有限元法；拟抛物N－S方程；伽辽金／最小二乘方

Being shot is like getting hit by a hammer, but at twice the speed of sound.

因为枪伤的伤口会像被一个2倍音速的榔头敲打过一样。。

And next year — on July 4, perhaps — they intend to take the North American Eagle to the hardpan desert at Black Rock, Nevada, and run it through a measured mile to set a new land speed record of about 1,300 kilometers per hour, 70 kilometers per hour faster than the speed of sound.

而在明年，也许是7月4日，他们打算把这架命名为「北美之鹰」的老战机带到内华达州黑岩硬地沙漠，希望在1实测英里的距离内，创下时速1300公里的陆地速度新纪录，比音速还要快70公里。

Plus, for instance , playing with that QQ velocity of sound, my reaction fault-like hebetude.

还有，比如说玩那个QQ音速，我反应不是一般的迟钝。

The simulation studies show this re-search method adapts to the hyp...

仿真研究表明，该方法适合用在高超音速飞机模型上，仿真结果与期望要求相符合。

After 5 minutes, the plane enters hypersonic speed state.

五分钟后，飞机进入高超音速状态。

Supersonic or hypersonic aeroelasticity is analyzed in time domain and frequency domain.

在时域和频域内实现了超音速、高超音速气动弹性的稳定性分析。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。