Influence of plasma actuators as a flow separation control device was investigated experimentally. Hump model was used to demonstrate the effect of plasma actuators on external flow separation, while for internal flow...Influence of plasma actuators as a flow separation control device was investigated experimentally. Hump model was used to demonstrate the effect of plasma actuators on external flow separation, while for internal flow separation a set of compressor cascade was adopted. In order to investigate the modification of the flow structure by the plasma actuator, the flow field was examined non-intrusively by particle image velocimetry measurements in the hump model experiment and by a hot film probe in the compressor cascade experiment. The results showed that the plasma actuator could be effective in controlling the flow separation both over the hump and in the compressor cascade when the incoming velocity was low. As the incoming velocity increased, the plasma actuator was less effective. It is urgent to enhance the intensity of the plasma actuator for its better application. Methods to increase the intensity of plasma actuator were also studied.展开更多
为了将车辆通过道路减速带时产生的振动能量加以回收,设计了一种路面减速带发电装置。提出了发电装置的设计方案,并介绍了其工作原理;建立了路面减速带发电装置的数学模型,确定了影响路面减速带发电装置回收能量的因素;以数学模型为基...为了将车辆通过道路减速带时产生的振动能量加以回收,设计了一种路面减速带发电装置。提出了发电装置的设计方案,并介绍了其工作原理;建立了路面减速带发电装置的数学模型,确定了影响路面减速带发电装置回收能量的因素;以数学模型为基础建立减速带发电装置的虚拟样机并进行仿真,确定了系统主要部件的型号与工作参数;通过搭建试验样机并进行试验验证了仿真结果的正确性。试验结果表明:路面减速带能量回收装置每次发电量在30 k J左右,如果每天有30 000辆车经过减速带,则大概可以产生5 k W·h的电量,足够给路边照明设施进行供电。展开更多
基金National Natural Science Foundation of China(Nos.50676094,50676095,50776086 and 50736007)Fundamental Researches of National Defense in Chinese Academy of Sciences(No.AB20070090)
文摘Influence of plasma actuators as a flow separation control device was investigated experimentally. Hump model was used to demonstrate the effect of plasma actuators on external flow separation, while for internal flow separation a set of compressor cascade was adopted. In order to investigate the modification of the flow structure by the plasma actuator, the flow field was examined non-intrusively by particle image velocimetry measurements in the hump model experiment and by a hot film probe in the compressor cascade experiment. The results showed that the plasma actuator could be effective in controlling the flow separation both over the hump and in the compressor cascade when the incoming velocity was low. As the incoming velocity increased, the plasma actuator was less effective. It is urgent to enhance the intensity of the plasma actuator for its better application. Methods to increase the intensity of plasma actuator were also studied.
文摘为了将车辆通过道路减速带时产生的振动能量加以回收,设计了一种路面减速带发电装置。提出了发电装置的设计方案,并介绍了其工作原理;建立了路面减速带发电装置的数学模型,确定了影响路面减速带发电装置回收能量的因素;以数学模型为基础建立减速带发电装置的虚拟样机并进行仿真,确定了系统主要部件的型号与工作参数;通过搭建试验样机并进行试验验证了仿真结果的正确性。试验结果表明:路面减速带能量回收装置每次发电量在30 k J左右,如果每天有30 000辆车经过减速带,则大概可以产生5 k W·h的电量,足够给路边照明设施进行供电。
