声速

A method using CFD technology is used for accurate prediction of aerodynamic force and heat of air-breathing hypersonic vehicles.

对吸气式高超声速飞行器而言，物面热流和摩阻的准确预测对飞行器设计及安全十分关键。

Hypersonic vehicle ; afterbody/nozzle ; integrated design ; genetic algorithms

高超声速飞行器；后体/尾喷管；一体化设计；遗传算法

It is not affected by the pressure of the air.

例3。 声速随温度的升降会有轻微的增减，但不受气压的影响。

Through ground test and hypersonic flow research, he made great progress in air-breathing hypersonic technology.

通过地面试验和高超声速非平衡流的研究，取得了再入突防气动物理的重要进展。

The scramjet is a new type of air-breathing propulsion device, which has remarkable performance and great potential superiority, and has a good prospect in the field of military aviation in the future.

超声速燃烧冲压发动机是一种新型的吸气式动力装置，因其良好的性能和巨大的潜在优势，在未来的军事和民用的航空、航天领域中具有广阔的应用前景。

The scramjet is a new type of air-breathing propulsion device, which has remarkable performance, great potential superiority, and has a good prospect in the field of aeronautics and astronautics in the future.

超声速燃烧冲压发动机是一种新型的吸气式动力装置，因其良好的性能和巨大的潜在优势，在未来的航空、航天领域中具有广阔的应用前景。

With the decrease of Mach number of inflow, the total pressure recovery and the shock angle increase; the number of reflection of shock wave in the duct also increases, but the strength of the shock wave decreases.

对某典型高超声速侧压式进气道三维流场进行了数值分析，就壁面压力分布、波系结构和近壁流谱图与实验结果进行了比较，计算反映了流动的基本特徵。

This paper investigates the effects of high temperature on ultrasonic velocity, refraction angle of inclined probe, ultrasonic attenuation, emitting strength of ultrasonic probe and defect detectable ratio, and provides practical methods of high temperature ultrasonic inspection for vessels and equipment, as well as concrete inspection procedure and key operational points.

文章通过研究高温对超声波声速、斜探头折射角、超声波衰减、探头发射超声波强度以及缺陷检出率的影响，提出了对容器设备进行高温超声波检测的方法、具体检测步骤和操作要点等。

The paper presents a new type of audible sound velocity measurement system.

研制了一种声频率范围内的声速测量系统。

Based on engineering design method and combined with numerical simulation,an axial symmetry supersonic inlet with boundary layer bleed was designed.

应用工程设计方法，结合数值模拟，设计了一种带有边界层吸除型式的超声速轴对称进气道，对进气道内流场进行了数值模拟研究，并且进行了风洞实验。

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。