Investigation of unsteady aerodynamic performance on oscillating airfoil at low Reynolds number 电感耦合三点振荡器低雷诺数振荡翼型非定常气动性能研究
Low-speed and non-linear flow through porous media numerical simulation for low-permeability gas reservoir nonlinear harmonic method in unsteady numerical simulation on a low speed axial turbine 低渗透气藏低速非线性渗流数值模拟研究低速轴流涡轮非定常数值模拟的非线性谐波法
Computations of Unsteady Aerodynamic Characteristic of Rotor Airfoil at Low Mach Numbers 旋翼翼型低Ma数动态失速特性计算卡门特雷夫茨翼型
In the present work, experimental investigation is conducted with emphasis on the effect of unsteady casing treatments with injection on the stall margin and efficiency of a low spee. 结果表明:非定常机匣处理能够在不同工作转速下对风扇稳定裕度有显著效果,效率没有明显改变。
Two-dimensional ( 2D) unsteady numerical simulation has been applied to study the effect of the variation in relative circumferential positions of rotors on the performance of a low speed compressor. 采用二维非定常数值模拟的方法研究了动叶相对位置的改变对低速压气机气动性能的影响。
Numerical analysis of unsteady viscous flow around actively deformed flexible airfoil for micro air vehicles under low Reynolds number 低雷诺数下微型飞行器主动变形机翼非定常气动特性数值分析
Flapping-wing micro air vehicle ( FMAV) is a new research hotspot in the world. But there is no accurate computational method for the unsteady aerodynamics which is based on low Reynolds number of flapping wing. 微型扑翼飞行器是国际上的一个新的研究热点,但目前基于低雷诺数的非定常扑翼气动特性尚无精确的计算方法。
[ Conclusion] Hearing loss caused by unsteady noise and high frequency noised is more serious than that by steady noise or noise of medium and low frequencies. 结论非稳态噪声、高频噪声引起的听力损伤比稳态/中、低频噪声引起的听力损伤严重。
Computer programs have been developed for unsteady one dimensional temperature field analysis, elastic and plastic strain analysis as well as for low cycle fatigue design. With this program in-service residual life evaluation of the drum will then be possible. 本文针对这种结构编制了可进行非稳态一维温度场分析和弹塑性应力应变分析及低周疲劳设计的计算机程序,为汽包的现场寿命监视创造了条件。
For development of 44 dtex/ 12 f FDY, the technology conditions such as the spinneret, spinning speed, oiling style, drawing and setting were adjusted. The problems of unsteady production condition, low grade product rate were solved. 在对44dtex/12fFDY长丝进行产品开发时,通过对喷丝板、纺丝速度、上油方式、拉伸定型等工艺条件进行调整,解决了44dtex/12f产品的生产不稳定、产品等级率低的问题。
In order to save soil resources and reduce building principal part structure engineering cost, finite difference method, harmonic wave method and response coefficient method have been utilized to analyze the unsteady thermal characteristics of wall insulation in low energy consumption building. 为节约土地资源和降低建筑主体结构工程造价,采用有限差分法、谐波法和反应系数法对节能建筑复合墙体的非稳态热工性能进行全面分析。
Unsteady seepage model for low permeability reservoir with threshold pressure gradient 考虑启动压力梯度的低渗透油藏不稳定渗流模型
The research of neural network method make known that the system is unsteady in the beginning of freezing, and the error is considerably large to low moisture soil. 采用神经网络方法研究表明,在冻胀初期系统难以稳定,同时对于低含水量的土体误差也较大。
Analysis of unsteady temperature field of film water cooling wall of boiler with low cycle number 低倍率锅炉膜式水冷壁壁温分布的暂态分析
Numerical analysis for the unsteady flow and casing treatment in a low speed centrifugal compressor 低速离心压气机非稳态流和机匣处理的数值分析
With the grade of molybdenum concentrate unsteady, the recovery is low in processing production of the concentrator. 选矿厂的铜钼选矿系统出现了透辉石类含铜钼矿石,使钼浮选钼精矿品位不稳定、回收率低。
Unsteady flows around flapping airfoils are simulated at low Reynolds number, by solving incompressible Navier-Stokes based on pseudo compressibility method. 通过求解引入拟压缩项的不可压Navier-Stokes方程,数值模拟了绕扑动翼型的低雷诺数非定常流动。
The unsteady heat transfer caused by the uniform component concentration in flame with low [ O/ C] ratio results in the vortex shedding with high amplitude, which induces the flame pulse and generates pressure fluctuations and flame noise with high amplitude. 在低氧碳比下,火焰由于组分浓度不均而产生不稳定传热,引发较高频率的涡旋脱落过程,从而诱发火焰振荡,产生高幅值的压力波动和火焰噪声。