音速

The transonic flutter characteristics are investigated for several wings, empennage and wing-body configuration, flutter critical speeds are numerically simulated.

以ONERA M6机翼和无后掠矩形机翼为算例，分别对它们的跨音速定常和非定常粘性绕流进行了数值模拟，计算结果和有关文献的结果进行了比较，吻合较好。

The oscillation performance of jet, as oscillation frequency, is the essential data for designing the fluidic device, which is also the key factor that influence the coupling effect of fluidic device and receiving tube. This paper does experiment on the oscillation availability and frequency of feedback jet-oscillation gas wave refrigeration. As a conclusion, the jet oscillates only in a certain range of geometrical sizes and operating conditions. Under the condition of high pressure ratio, the frequency of the jet"s oscillation is only affected by the feedback tube"s length and chamber remarkably. Under the condition of low pressure ratio, the frequency descends with rise of the pressure ratio.

本文将跨音速正反馈射流振荡器与接受管耦合，对耦合后的射流振荡气波制冷机的可振性、振荡频率以及它们的影响因素作了实验研究，得出如下结论：射流只在一定的操作条件和几何结构尺寸范围内才能稳定振荡；射流的振荡频率在较高压比下只受反馈管长和反馈管容腔大小的显著影响，在小压比下随压比的增大而增加；其它结构尺寸和操作条件只影响可振性。

Purpose-The study of the aspirated inflator on side airbag modulus can provide a new direction for airbag design. The main purpose of this project is to design, model and test a new inflator.

本研究主要在提供一个新的安全防护气囊基本构型品的设计方向，应用计算体学值方法模拟分析同几何尺寸气体产生器之近音速或超音速流场状态。

What's more, as the vehicle approaches the speed of sound, it produces a frontal shock wave which liquefies the earth ahead, so the wheels end up carving through ground, rather than simply rolling over it.

更重要的是，由于车辆接近音速的，它产生正面冲击波的液化地球未来，所以车轮最终通过地面雕刻，而不是简单地在它滚动。

In the background of numerical simulation for the transonic flow about advanced transport aircraft with wing-mounted nacelles, great efforts have been made in this thesis for the improvement of the grid generation technique and the numerical methods for solving the Euler equations.

本文以民用飞机复杂外形跨音速绕流数值模拟及气动力分析为应用背景，在复杂空气动力外形网格生成技术，Euler方程数值求解方法的改进。。。

Sonic Nozzles for gases, Venturis, ASME Flow Nozzles and Orifice Plates or liquids will meet nearly all application requirements.

音速喷嘴，用于气体管，ASME流量嘴和孔板，或者液体，满足几乎所有应用需求。

At first, a simple algebraic method is appied to generated O-H type three dimensional meshes, then the meshes are devided into tetrahedra meshes.

首先应用一种简单的代数方法生成了O-H型网格，然后，将其剖分为四面体网格，从而完成了简化航天飞机跨音速绕流的数值模拟。

The results show a reversed-flow region is formed at the tip of the pressure side due to the influence of the outside hot combustion gas and the pressure side tip thickness. The pressure gradient makes the coolant flow exit from the trailing edge slot first separates from the trailing edge cut-back, and then affected by the expansion wave, the coolant gas reattaches the cut-back of the trailing edge after passing a certain distance.

研究表明，由于外流和叶片叶盆尾缘厚度的影响，叶盆尾缘端部形成局部回流，叶片尾缘劈缝气体流出后受压力梯度的影响先抬起与叶背面分离，在流过一段距离后由于跨音速流膨胀波的作用，冷气流再次附着在叶背尾缘上。

After years of making fans track down out-of-print singles, obscure compilations, and odd Japanese import pressings, Sonic Youth have decided to take a little mercy on their hardcore fans.

音速青年乐团的各张绝版单曲、不知名的选集和怪异的日本灌注唱片已被其歌迷追随了数年，现在该乐队要稍微&怜悯&一下他们的铁杆歌迷了。

With high temperature and high pressure in nozzle of wind tunnel, the effect of variable specific heat on nozzle design must be considered.

本文针对超音速、高超音速喷管内马赫数、温度变化剧烈的特点，研究了比热容变化对设计喷管型面产生的影响。

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。