双半椭球体氦气囊非饱和形态试验

Unsaturated morphology tests of double semi-ellipsoid helium bag

为研究飞艇氦气囊在不同充盈度下的非饱和形态,揭示氦气囊在充气与泄气过程中的形态变化规律,设计与制作了双半椭球体氦气囊及其试验装置,采用控制充盈度的方法开展了双半椭球体氦气囊充气试验与泄气试验.结果表明:充气过程中,上下半椭球膜面先向上升起,随后上半椭球膜面沿环向膨胀至饱满形态,最后下半椭球膜面下沉并沿环向膨胀至饱满形态;泄气过程中,下半椭球膜面先沿环向收缩并向上升起,随后上半椭球膜面开始沿环向收缩,最后上下半椭球膜面同时向下塌陷至真空状态.

In order to study the unsaturated morphology of the airship helium bag under different filling degrees,and to reveal the morphology variation rules of the helium bag in the process of inflation and deflation,a double semi-ellipsoid helium bag and its test equipment were designed and manufactured.The inflation and deflation tests on double semi-ellipsoid helium bag were carried out by the method of filling degree control.The results show that during the inflation process,the upper and lower semi-ellipsoid membranes first rise upward,then the upper semi-ellipsoid membrane expands to a full form in the ring direction,and finally the lower semi-ellipsoid membrane sinks down and expands in the ring direction to a full form.During the deflation process,the lower semi-ellipsoid membrane first shrinks in the ring direction and rises upward,then the upper semi-ellipsoid membrane surface begins to shrink in the ring direction,and finally the upper and lower semi-ellipsoid membranes collapse downward to the vacuum state at the same time.