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3-D CFD ANALYSIS ON EFFECT OF HUB-TO-TIP RATIO ON PERFORMANCE OF IMPULSE TURBINE FOR WAVE ENERGY CONVERSION
wave energy impulse turbine computational fluid dynamics
2009/10/14
This paper deals with the computational fluid dynamics analysis on effect of hub-to-tip ratio on performance of 0.6 m impulse turbine for wave energy conversion. Experiments have been conducted on the...
Performance and Emission Characteristics of LPG-Fuelled Variable Compression Ratio SI Engine
Variable compression ratio engine LPG Performance Emissions Spark Ignition
2009/10/9
The growing concern about the fast depletion of petroleum-based fuels and the environmental pollution caused by their combustion has been a compelling incentive to many researchers to find ways to use...
直联式空压机PWM变占空比控制(Changing Duty Ratio PWM Control of Direct-drive Air Compressor)
直联式空压机 直流无刷电动机 变占空比
2009/8/11
研究了一种用直流无刷电动机驱动的直联式空压机,借鉴直接转矩控制的思想,根据直联式空压机负载的特点,提出了一种基于单片机的脉宽调制(PWM)变占空比控制方法。根据空压机负载,将控制周期中的每一拍设置成不同的占空比。给出了基于Simulink的仿真计算,仿真结果表明,这种控制方法简单可行,直联式空压机转速波动较小,且有较好的稳定性和抗干扰能力。试验结果表明,PWM变占空比控制能达到节约成本,提高效率,...