查询词典 wave velocity

With the modification of the nozzle and the adjustment of the spray velocity, the bio-oil can be ignited successfully by using a pilot flame to pre heat the kiln chamber.

通过调整喷雾速度和喷嘴结构，在炉膛预热并使用明火点火源的情况下，生物油可以顺利点火。

The major works are as follows: 1 The 3-D numerical model of U-sharp flow passages is set up. The single-phase fluid flow and heat transfer are simulated for the U-sharp smooth and rib-roughened flow passages with FLUENT software. Their performance curves, temperature field and velocity vector are obtained and the local heat transfer and flow pressure-drop distribution along flow passage are analyzed. It is revealed that the ribbed flow passages can enhance heat-transfer and make the temperature more uniform, but it increases the pressure-drop to more extent. 2 The influences of diaphragm depth, channel width and board spacing on the performance are investigated.

建立了层叠式蒸发器U形流道的3维湍流模型，用FLUENT软件对尺寸相同的U形光滑流道和肋化流道中单相流体的传热和流动进行了数值模拟，得到了两种流道的传热和阻力性能关系曲线及速度矢量图、温度场，分析了光滑流道和肋化流道的局部换热系数及沿程压降变化，结果表明流道的肋化能有效的增强传热，而且使流体的流动和传热更加均匀，但也较大地增大了阻力。

Based on the analysis of physics course of heat transfer, the mathematical model of single-phase flow in the rectangular narrow channel is proposed. And the boundary conditions are given to get the unique numerical result. The finite volume method is used to found the discrete scheme of equations. According to the flow of SIMPLER arithmetic, the computing program is developed and the correctness of program is validated.Then the program is used to solve the problem of flow and heat transfer in rectangular narrow channel.The stable two dimension velocity and temperature fields in rectangular narrow channel and plate fuel are obtained.

在明确窄缝流道及燃料板换热物理过程的基础上，建立了描述矩形窄缝内单相流动与换热问题的数学模型，并给出了合理的边值条件；然后利用有限容积法对方程进行离散，根据SIMPLER算法的流程编制了模型求解程序；在验证程序正确性的基础上，对矩形窄缝流动与换热问题进行了求解，得到了矩形窄缝流道和板状燃料元件内部温度场、速度场的二维分布。

The material properties that have the greatest impact on the high-speed performance of HEMTS are the high sheet charge density in the two-dimensional electron gas (2DEG) and the superior electron velocity.

在这篇报告中，我们将要报告高电子迁移率电晶体发展历程与结构特性，应用在小讯号等效电路模型的建立上。

Distinguished from the Cu content which have the optimal effect on cast strength is 5% with the chill casting, the Cu content that have the optimum effect on cast is 8% in the squeeze casting, furthermore, its strength effect is much better. The vacancy consistency of casts is raised in the squeeze casting which makes speed the diffuse velocity of atom and heat treatment process.

比压还增加了铜在铝基体中的溶解度，和金属型铸造时铜对铸件的最大强化作用发生在含量为5%时不同，挤压铸造时铜对铸件强化最大的含量为8%，强化效果较金属型铸造时更佳。

Ssuming that the motion track of pitch-down target consist of the three stages: horizonal linear motion,constant velocity circular motion, pitch-down linear motion.

假设俯冲目标运动轨迹依次为水平直线运动、匀速圆周运动。俯冲直线运动的三个阶段。

Mm×400mm fiber reinforced composite material armor panel behind the ship's C type steel panel was used to simulate warsh ip's light composite armor, and the ballistic velocity penetration experiments for the different FRC armor panel and the different structural status, such as space certain clearance or no between the two parts, have been done.

采用纤维增强复合材料板前置船体结构钢板模拟舰用轻型复合装甲结构，对有间隙和无间隙复合装甲结构以及不同纤维增强复合材料防弹板进行了打靶实验研究，实验测试了不同纤维增强复合材料防弹板以及有间隙和无间隙复合装甲结构抗弹丸穿甲的吸能量。

The simulation results of inlet air manifold show that the uniformity of the velocity at outlet of the manifold are improved by using the appropriate bell-mouthed inlet and clipper-built baffle, and inlet pressure needed of the manifold decrease.

对进气箱的模拟结果表明，采用扩压型进口加流线型挡块的方案可以提高出口速度的均匀性，同时降低了进气箱入口所需的气体压力。

A clock at the level of micro second has beendeveloped by using the microcomputer's clock pulse signal. With this high precision clock, the error of measuring twisting moment can be less than 1％ and the error of measuring rotation velocity less than 1‰.

利用微机的时钟脉冲研制出一种精度达微秒级的时钟，用此时钟测量扭矩的误差小于1％，测量的转速误差小于1‰。

Basing on the Doppler reflectivity map, the entire precipitation rain bands were apparent westward rotation process. And basing on Doppler radial velocity map, the configuration of low-level convergence with high-level divergence is conducive to the precipitation occurrence and development. The rainstorm resulted from the cloud band maintaining over the rainfall zone.

从多普勒反射率因子图上，整个降水雨带为明显的旋转西进过程；多普勒径向速度图上，低层辐合高层辐散的配置有利于降水的发生发展，暴雨是长时间维持在其上空的强降雨云带造成的。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。