压强系数

此外还导出了压强系数的新的近似表达式。

In addition , the author present a new formula of the pressure coefficient .

单股和双股射流塘底脉动压强系数与近壁紊流强度的关系可用对数曲线表述。

The relationship of the fluctuating pressure coefficient on wall and the turbulent intensity near the wall can be described with logarithmic curve .

运用数值风洞法对斜拉桥部分周围流场进行数值模拟，得到斜拉桥周围流场的速度分布和斜拉桥表面的压强系数。

Through the numerical analysis of the flow phenomenon around the cable-stayed bridge by means of numerical wind tunnel , the speed distribution of the f.

利用发动机地面试验结果，引入广义的压强系数和推力系数，计算了发动机的特征速度、喷管喉部面积等参数。

The characteristic velocity , area of nozzle throat and other parameters are calculated by using the static test results of solid rocket motor ( SRM ) and introducing generalized pressure coefficient and thrust coefficient .

本文叙述当地流活塞理论，根据这一理论导得超声速和高超声速尖前缘翼型的压强系数和振动导数公式。

In the paper , local-flow piston theory is described . Using this theory , formules are developed which are used for calculating pressure distributions and oscillating derivatives of airfoils in supersonic / hypersonic stream .

通过比较在此过程中的主超车与被超车的阻力系数、升力系数的变化规律以及车身表面压强系数分布情况，验证了重叠网格应用于超车过程外部流场数值仿真上的适用性和准确性。

In this process , the applicability and accuracy of overset mesh method in simulating the automotive external flow field are proved by comparing the variation of the aerodynamic coefficient and the distribution of body surface pressure .

理论分析了FBG中心波长相对偏移量与压力的关系，实验测得该传感器的压力灵敏度为2.767×10-4/MPa，是裸FBG压强灵敏度系数的142倍。

The pressure applied on the cantilever can be measured by measuring the central wavelength . The experimental value of the pressure sensitivity coefficient is 0.436 5 nm / MPa . It is 142 times of that of the bare FBG .

压强强度系数、脉动压强极差系数与含沙量、掺气浓度的关系。

The effects of air concentration and sediment content on the amplitude and frequency of pressure fluctuations are discussed .

提出了目前评价压强温度系数所存在的问题，较系统地分析了压强温度系数的变化规律，建立了参比压强温度系数的计算方法。

The problems in present assessment of the pressure temperature coefficient were pointed out , the variation law of the pressure temperature coefficient was systemically analyzed , and the method in calculating standard pressure coefficient was also established .

该传感器有很好的线性度，线性度为0.9998。可以改变该传感器的有关参数来调节传感器的压强灵敏度系数，实现不同压强范围的测量。

The FBG sensor has good linearity , and the correlation is 0.999 8.The pressure sensitivity can be changed by changing the size of fundus material and the area of piston to meet the measurements of different pressure ranges .

同时指出通过调节等强度梁和波纹管的参量，可以将该传感器的压强灵敏度系数做得很高，直至破坏了光纤布拉格光栅。

At the same time , it was pointed out that the pressure sensitivity coefficients of this kind of sensor could be very large by regulating the parameters of strength beam and bellow till the in-fiber Bragg gratings were damaged .

该传感器的压强响应灵敏度系数理论值和实验值分别为0.9200nm/MPa和0.8223nm/MPa，分别为裸FBG灵敏度系数的306和274倍。

The theoretical and experimental pressure sensitivity coefficient of the proposed sensor are 0.92 nm / MPa and 0.822 3 nm / MPa , which are 306 and 274 times of that of the bare FBG respectively .

本文根据二元水槽中试验的系统资料，探讨了堰面压强及流量系数随堰高变化的规律，并建议了一种计算任意堰高时WES堰流量系数的方法。

Based upon recent systematic experiments in a two dimensional flume , this paper discusses the law of pressures and discharge coeffi ci-ents for various weir heights , and presents a method to calculate dis ch-arge coefficients of WES weirs for any given weir heights .

一维连续小波变换结果显示，在不同压强下小波系数大小及分布、极大值分布都有明显区别。

Wavelet coefficients , its distributions and maximal lines differentiate obviously under different pressures according to the one-dimensional continuous wavelet transformation .

通过选择不同材料的开口环和铝箔管的材料以及改变其结构参数，可灵活设计并调节压强传感灵敏度系数及压强感测范围。

The pressure sensitivity and measurement range can be designed and altered by changing the material and parameter of the opening loop and aluminum-foil pipe .

实验结果表明：该传感器在低压范围内具有很高的压强传感灵敏度系数，可达2.50×103nm/MPa，实验结果与理论分析基本相符。

The experimental results indicate that the sensor is very sensitive to pressure , which is up to 2.50 × 10 ~ 3nm / MPa , and the experimental results agree with the theoretical analysis .

压强分布和升力系数的计算值与现存文献的数值结果和实验数据是一致的。

Predicted pressure distribution and lift coefficient are in agreement with numerical results and experimental data available in the literature .

该系统可用于四极质谱计分压强灵敏度及图样系数的校准和四极质谱计稳定性的研究，并可用作演示系统。

This system can be used to calibrate the partial pressure sensitivities and cracking patterns of QMS , to study the stability of QMS and to be a demonstration system .

给出了FBG反射波中心波长与压强的关系以及压强灵敏度系数的表达式。

The relation between the central wavelength of reflection wave of FBG and pressure was given , and the expression of the pressure sensitivity coefficient was also given .

换算到标准压强条件下，平均压强冲量系数法的计算精度优于切线法的计算精度，并作出了计算验证。

By converting test condition to the standard pressure condition , calculation accuracy of average pressure impulse coefficient method is superior to that of tangent method .

推导了该传感器的压强与布拉格波长相对偏移量之间的关系，给出了该传感器压强响应灵敏度系数的解析表达式。

The relation between relative shift of Bragg wavelength and the pressure applied on the sensor is derived , and the analytical expression of pressure sensitivity coefficient is also given .