Objective To obtain the expiratory resistance in pressure oxygen mask under no overpressure condition with numerical simulation method.
目的用数值模拟的方法获得加压供氧面罩无余压状态下呼气活门的呼气阻力。
The mode of fluid flow is discussed. It is believed that there may be both lateral and vertical flows in the sand lens under the overpressure condition.
对砂岩透镜体中的流体排放机制进行了探讨，并认为处于强超压状态的砂岩透镜体油气藏可能存在侧向和垂向两种流体排放模式。
Although the peak value of return shock is relatively low, the effect time is long and sometimes the scope excesses the maximal overpressure of some deflagration condition.
尽管二次超压的峰值相对较小，但作用时间长，且有些二次超压过程中的超压上升幅度甚至超过了某些爆炸环境下的最大超压值。
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