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Study on Aerodynamic Characteristics of Supersonic Airfoil 预览
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作者 Wentao Yong 《现代机械工程(英文)》 2019年第1期13-19,共7页
With the invention of the aircraft, it has become much faster and larger than the original Wright Brothers aircraft. When the speed is high enough to cross the speed of sound, air conditions will be different than tha... With the invention of the aircraft, it has become much faster and larger than the original Wright Brothers aircraft. When the speed is high enough to cross the speed of sound, air conditions will be different than that in low speed due to the existence of shock wave. In this work, we introduce several numerical ways to analyze the performance of the airfoil when the speed is higher than the speed of sound. With these numerical methods, we analyzed the performance of diamond-shaped airfoil under different angles of attack and speed. With this data, engineers can choose a better airfoil to attain a lower drag coefficient as well as lift coefficient when designing a high-speed aircraft. 展开更多
关键词 Aerodynamic SUPERSONIC SPEED Diamond-Shape AIRFOIL Drag COEFFICIENT LIFT COEFFICIENT
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数控宏程序在椭圆加工中的应用 预览 被引量:3
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作者 王凯 张文涛 +1 位作者 李勇 刘燕军 《国外电子测量技术》 2010年第6期 76-79,共4页
在数控加工中,虽然采用CAD/CAM自动编程在复杂零件加工中应用比较普遍,但手工编程在现代加工同样有其用武之地。比较自动编程,手工编制的程序可以更短小精悍,具有更强的可调性和可控性,这需要采用宏程序编制技术。本文以椭圆的轮廓加工... 在数控加工中,虽然采用CAD/CAM自动编程在复杂零件加工中应用比较普遍,但手工编程在现代加工同样有其用武之地。比较自动编程,手工编制的程序可以更短小精悍,具有更强的可调性和可控性,这需要采用宏程序编制技术。本文以椭圆的轮廓加工、椭圆平面加工、椭圆球面凹槽加工为例,由浅入深的详细讲解各种椭圆加工的宏程序编制方法,说明宏程序在手工编制较为复杂零件的强大作用,抛砖引玉,用活宏程序。 展开更多
关键词 椭圆的轮廓加工 椭圆平面加工 椭圆球面凹槽加工 宏程序
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