横向双极静电除尘器空气动力增效

为明确横向双极静电除尘器的空气动力增效机理,基于电除尘器的经典效率公式研究了空气动力对横向双极静电除尘器除尘效率的影响。数值模拟结果表明：横向双极电除尘器内荷电粒子的驱进速度是电场驱进速度与空气动力驱进速度之和。极板迎风面的空气动力增效幅度强于背风面,而极板背风面的低速回流区是主要的收尘区。实验结果表明：空气动力驱进速度与电场风速呈二次曲线分布关系。电场风速小于1.5 m/s时,气流运动强化了空气动力增效幅度;而电场风速大于1.5 m/s后,二次扬尘作用减弱了空气动力增效幅度。横向双极电除尘器除尘效率修正公式表明：在横向双极电除尘器结构参数一定的情况下,除尘效率受静电力和空气动力的共同影响。     

未来的空中客车

7月19日,空中客车公司在范堡罗国际航空展上发布了面向未来的概念飞机。空客公司的飞机材料、空气动力、客舱和发动机方面的专家根据人们对未来航空旅行的预期联合设计了这款被称作“工程师之梦”的概念飞机。这款概念机机身较长,机翼细薄,发动机采用半嵌入式,尾翼呈U形,采用轻型“智能化”机身,体现出空客进一步提高飞机环保性能的理念。其设计具有降低燃油消耗、减少排放、降低噪音和增强舒适性的特点。空客对未来飞机的看法,还包括飞机内饰方面的变化。     

Development of the Zinc-air Power Battery on Electric Bikes in China

Electric bicycles powered by lead-acid batteries have developed very fast for several years in China. Because the inconvenience caused by the service performance and the inconsistency to the environmental protection policy of the lead-acid battery, the zinc-air power battery was proposed to solve the problem in this paper. The advantage and the feasibility of developing zinc-air power batteries in China have been illustrated in the paper. And, it is represented that development of electric bicycles powered by the zinc-air power battery also can accelerate this kind of battery＇s development in other electric vehicles, which is favorable to economic development and environmental protection.     

风机噪声综合治理的探讨与应用

中对锅炉房主要噪声声源之一的鼓风机噪声特点进行了分析,提出了相应的治理措施,对消声采用的设备及结构做了理论探讨和研究,为消声工程设计和制造提供参考。     

空气动力学与汽车造型

通过分析空气动力学对汽车造型的影响，说明空气动力学与汽车的造型有着十分密切的关系。空气动力学的发展推动了汽车造型的发展，而汽车造型的发展，反过来又促进空气动力学的进步。同时，对汽车的未来造型作了进一步的估计。     

科技成果

世界量快计算机一秒执行计算千兆次；中国自主研制出U8型无人直升机；碳纤维复合导线在无锡研发成功；南京造纸污水处理剂通过鉴定；扬州研制出空气动力自行车；梦兰“龙芯”千元电脑即将面市；亚洲量大的风力发电机风轮投入试生产。     

蒙古语松紧元音言语空气动力学

基于实验的方法,对标准蒙古语松紧元音的言语空气动力特征进行了描述,找出了元音的松紧性变化和舌位的移动对于气流率、声门阻力、发声效率等6项空气动力参数的影响,并从元音的松紧和舌根位置的关系方面,验证了标准蒙古语的元音松紧和舌根位置变化有相互附带的关系。     

地效翼空气动力风洞试验

为深入研究地面效应机理及地面附近粘性流动对地效翼空气动力的影响,在同济大学上海地面交通工具风洞中心的空气动力-气动声学风洞内对地效翼模型进行了风洞吹风试验.风洞试验中利用移动带路面模拟系统模拟了机翼和地面的相对运动;通过改变地效翼展长、装配端板,研究了地效翼的三维效应和端板对空气动力的影响;分析了地效翼的失速特性及其影响因素.通过地效翼风洞试验研究揭示了地面效应机理及移动地面模拟的重要性,并深入分析了地效翼空气动力特性,为地效飞行器空气动力设计和研究提供了参考.     

Aerodynamic force generation of an insect-inspired flapper actuated by a compressed unimorph actuator

We examined experimentally the flapping performance in terms of aerodynamic force generation of an insect-inspired flapper actuated by both of original LIPCA and compressed LIPCA. Flapping tests for two artificial wing shapes of horse botfly and hawk moth were conducted at the wing rotation angle of 60° and a flapping frequency range from 6 Hz to 12 Hz to find the optimum flapping frequency and to investigate the effect of compressed LIPCA and wing shape on the force generation. Flapping tests in the vacuum were also undertaken to measure the induced inertia force. The aerodynamic force was calculated by subtracting the inertia force from the total force measured in the air. It was found that the average inertia force was relatively small when compared with the average total force. The use of the compressed LIPCA could significantly improve the flapping angle of the flapper from 110° to 130° （18.2% increase） resulting in 24.5% increase in the average aerodynamic force. It was also found that flapper with hawk moth wings could produce larger force than the flapper with horse botfly wings.