On the Flow of Gas Through the Piston-Rings : 2nd Report, The Character of Gas Leakage

Abstract

The measuring values of the discharge coefficient and the temperature of a gas flowing through the piston-rings which were obtained in 1 st Report, are used to calculate the amount of the leakage gas and its pressure distribution under several conditions of the piston-rings. And comparing these calculated results with the previous experimental ones, the following conclusions are reached ; (1) The calculation and experimental values are consistent in results, (2) the mechanism of gas leakage through the piston-rings corresponds to that of a gas flowing through the labyrinth, changing rapidly its properties, (3) especially, the unsteadiness of leakage flow produces an interesting effect upon the gastightness, (4) and it is also proved that the leaking gas hard y contains combustion gas when estimated from the theoretical calculation.