声速的

It mainly studys the relations of upriver absolute pressure and flow, the relations of differential pressure and flow, the influence of testing pipe to the result.

主要研究了上游绝对压力与流量的关系，差压与流量的关系，声速流导和临界压力比与上游压力的关系，测试管对测试结果的影响等。

The influence of radiation on flow was controlled by temperature and absorption coefficient.

结合流动计算的MacCormack格式和辐射传输计算的Monte Carlo法，研究了跨声速喷管内流动与辐射的耦合现象，考察了不同温度和吸收系数情况下流动与辐射的相互影响。

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。

sound velocity ; temperature ; stationary wave method ; ultrasonic wave

虽然用超声波测声速具有以上优势，但实验数据的精确度在一定程度上受到超声波信号发生器的稳定性、压电陶瓷换能器的效率、周围环境温度等因素的影响。

It is an advanced technology. In all these methods,acoustic velocity thermometry based on the acoustic travel time is a better one with a wider use.

而在声学测温的各种方法中，基于声波传播时间的声速测温方法又是一种比较好的、应用更广泛的方法。

Numerical simulation to three-dimensional turbulent flow in multistage axial compressor blade row is carried out, where high resolution third-order ENN scheme is adopted to catch the shockwave and simulate the turbulent flow correctly, and LU-SGS implicit method is chosen to improve computation rate. A nicety and high efficiency numerical simulating system is thus constructed.

对多级轴流压气机叶栅内三维紊流流场进行数值模拟，采用高精度高分辨率的三阶ENN格式以保证对激波的捕捉和对紊流特征的正确模拟，利用LU-SGS隐式解法提高了计算速度，从而构成了一种既准确又高效的多级跨声速轴流压气机紊流流动数值求解系统。

The precision of the traditional ultrasonic localization method is limited due to unsufficiently precise estimation of the sound velocity and the time of flight, therefore, a new method, the special fusion method for redundancy ultrasonic information was proposed to solve the precision problem.

针对常规的超声波定位方法存在对决定定位精度的声速与渡越时间估算不准，导致定位精度有限的问题，提出了一种新的超声波绝对定位方法，即冗余超声波信息特殊融合法。

It turns out that the flow and noise characteristics are quite complex and different from those of incompressible jets due to existence of quasi-periodic shock cell structures.

超声速射流是一般工业和军事工业中得到广泛应用的重要流动现象，对其流动特性和声学特性的研究，在实际应用和学术研究上有重要的理论价值和实际意义。

The processed results show that the new bond index curve is relatively smooth and the value is close to one in the well-bonded second interface, which can basically eliminate the influence of the formation velocity on the bond quality of second interface and can improve the evaluation quality of second interface.

评价结果表明，新的胶结指数曲线在固井Ⅱ界面胶结良好井段相对较平滑且数值接近于1，基本能够消除地层声速对Ⅱ界面胶结质量的影响，进而改进了固井Ⅱ界面的评价质量。

The study shows that regenerative cooling can meet the airframe/engine integrated cooling requirements in the range of flight Mach numbers from 6 to 12, as fuel injection concept (injector locations and injection fuel mass flow) is set properly, and hydrogen temperature at the exit of cooling passage is allowed to be a relative higher value.

研究表明，在马赫数6～12的范围内，通过适当配置燃料喷射方案和提高冷却通道出口冷却剂的温度，采用再生冷却方式能够满足机体／发动机一体化高超声速飞行器的冷却需求。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。