O_2和H_2O对脉冲电晕分解NO的影响

在脉冲电晕放电条件下,探讨了O2和H2O对NO分解反应过程的影响,并对复杂组分中NO的分解特性进行了实验研究。研究结果表明,脉冲电晕放电对NO分解反应具有一定的促进作用,可有效地分解模拟烟气中的NO,脱除效率随脉冲电压的增加而缓慢增加;受O2和H2O影响,NO分解转化率较N2氛围略有降低。     

O2和H2O对脉冲电晕分解NO的影响

在脉冲电晕放电条件下，探讨了O2和H=O对NO分解反应过程的影响，并对复杂组分中NO的分解特性进行了实验研究。研究结果表明，脉冲电晕放电对NO分解反应具有一定的促进作用，可有效地分解模拟烟气中的NO，脱除效率随脉冲电压的增加而缓慢增加；受O2和H2O影响，NO分解转化率较N2氛围略有降低。     

Numerical Simulation and Experimental Investigation on Performance of the Wells Turbine in Irregular Oscillating Flow

The Wells turbine is an axial-flow air-turbine designed to extract energy from ocean waves. An important consideration is the self-starting capability of the Wells turbine, a phenomenon encountered where the turbine accelerate by itself up to a certain speed for the best turbine performance. In order to clarify the self-starting characteristic and running performance of the Wells turbine in an irregular oscillating flow, a numerical simulation process is established in this paper on the rational assumption of quasi-steady flow conditions. Both self-starting characteristics and running performance are obtained through the numerical simulation and subsequently compared with the experimental data achieved on a computer-controlled oscillating flow test rig which could realize some irregular oscillating flow according to the specified spectrum. Results show that the self-starting time decreases with the increase of the significant wave height and the mean frequency of the irregular oscillating flow. Therefor     

动脉内壁剪切应力动态分布数值模拟研究

针对人体动脉系统,利用心动周期内血管血液流量波建立了血管壁面切应力动态分布的求解体系,在一定的假设条件下,推导了不同Womersley数下该体系的分析解;最后采用该求解体系和分析解,利用血流动力学数据计算了猪颈动脉的管壁切应力动态分布,结果是本文的数值模拟求解计算量少,而且考虑了血管壁的弹性特性,得到更趋于合理的管壁切应力分布。     

A Simple Method for Predicting Drag Characteristics of the Wells Turbine

1 .Introduction The Wells turbine ,consisting of several symmetric aerofoil blades ,fixedto a hub,can rotate inthe same direction without anyrectifyingflap valves .It has been consideredto bethe most prospectivewave energy conversion deviceforits simple s…     

输出控制方法对Wells透平性能输出特性影响的研究

文中利用实验方法系统研究了负载控制技术对OW C波能转换装置的影响。研究结果表明,当透平完成自起动过程后,在装置输出最佳工况点处,输入波况对平均最佳进气迎角的影响很小,其值基本处于8~10°之间。因此,为实现变工况下波能装置的最佳性能输出,只需保证透平的平均进气迎角始终处于上述范围。反之,利用文中给出的平均最佳进气迎角也可确定透平的最佳转速,进而确定最佳工况点。     

用于Wells透平性能分析的稳态实验台研制

文中利用二维模型分析了威尔斯透平（Wells)的气动力性能，并以此为基础，设计并研制出多用途吸风式稳态透平试验台，该试验台一方面可用来研究稳态流动透平的总体气动性能以及稠密度、翼型等参数对透平性能的影响，另一方面又还可以测量透平前后的速度场、压力场，为分析透平气动损失、优化透平设计、提高波浪能转换效率提供手段。