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为预估压力容器泄漏孔大小,分析了泄漏孔内气体流动规律和压力容器内气体参数状态特性,提出了该过程的3个假设,建立了反映泄漏孔当量半径的数学模型。以此为基础,提出了预测泄漏孔当量半径的压力变化率预估方法。对容积为0.008 48 m3、有3个半径为0.4 mm泄漏孔的压力容器的压力情况进行了实验研究,并根据所建立的数学模型计算泄露孔的半径。结果表明,压力容器泄漏孔半径计算数值与实际压力容器泄漏孔半径吻合很好。这为进一步研究不同容积压力容器的泄漏孔情况、泄漏规律提供了重要参考。
In order to predict the size of leaky hole in pressure vessel, the gas flow in the leak hole and the gas state characteristics in pressure vessel were analyzed. Three hypotheses of the process were proposed and a mathematical model reflecting the equivalent radius of leak hole was established. Based on this, a method of predicting the rate of pressure change of the equivalent radius of the leak hole is proposed. The pressure of a pressure vessel with a volume of 0.008 48 m3 and three leak holes with a radius of 0.4 mm was experimentally studied. The radius of the leak hole was calculated based on the established mathematical model. The results show that the calculated value of the pressure vessel leakage hole radius is in good agreement with the actual pressure vessel leakage hole radius. This provides an important reference for further study on the leakage holes and leakage patterns of different volume pressure vessels.