在设计各种发动机时,为了预先解决在以后确定气门和气门座圈最佳几何形状时可能出现的新问题,研究了其主要结构特征对气体流动特性的影响。在稳流气道试验时,此气道随着它作为进气道或排气道用而改变气流方向。由于测量得到的参数是无因次的,所以此结果可引用到不同尺寸的同类气道上。 In the design of various engines, the main structural features of gas engines were studied to determine the gas flow characteristics in order to solve in advance new problems that may arise when determining the optimal geometry of the valve and valve seat. In a steady flow airway test, the airway changes its direction of air flow as it functions as an intake or exhaust passage. Since the measured parameters are dimensionless, this result can be referenced to the same type of airway of different sizes.