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为研制飞机涡轮发动机的风叶材料,Howmet研究了一种用来检定材料抗鸟类碰撞性能的试验方法。抗鸟类冲撞是涡轮发动机风叶材料至关重要的性能,因为风叶位于发动机的最前面,当它吸入鸟类或其它外物时必定要受到冲击。风叶材料的抗鸟类冲击性能通常是在Wright-Patterson空军基地进行试验的。试验是用气泵使冻鸟射出并以某速度撞到发动机的风叶上,然后不断增大冻鸟的喷射速度直至风叶断裂为止。根据各种材料断裂时的冻鸟喷射速度可将材料进行分类。Howmet研究的方法是采用等效的模拟试验来代替与鸟类碰撞的试验。该方法是用仪器的摆锤来冲击加工好的风叶横截面,测定风叶开
To develop a turbine blade material for aircraft turbine engines, Howmet investigated a test method for testing the resistance of materials to bird-borne collisions. Anti-bird collisions are vital properties of turbine engine blades because the blades are located at the very front of the engine and must be subjected to impacts when they inhabit birds or other foreign objects. The anti-bird impact performance of the blade material is usually tested at the Wright-Patterson Air Force Base. The experiment is to use a gas pump so that frozen birds shot and hit the engine blades at a speed, and then continue to increase the rate of injection of frozen birds until the blades rupture. Materials are classified according to the rate of spray of frozen birds at the time of breaking of various materials. Howmet’s approach is to use equivalent simulation tests instead of collisions with birds. The method is to use the pendulum of the instrument to impact the cross section of the processed blade and measure the opening of the blade