| 摘要 |
A spherical pressure vessel, to add buoyancy to a submersible vehicle, is designed to withstand a fraction of the maximum ambient sea pressure to be encountered. The sphere is filled with a pressurized gas and as the vehicle descends the gas is heated to increase its pressure in proportion to the absolute temperature. As the submersible ascends, the gas is cooled to decrease its pressure. The heating and cooling of the gas are so controlled that the difference between the internal gas pressure and the external pressure of the ambient sea is always within a broad safe range. Pressurization of the sphere before a descent allows attainment of a certain depth without the requirement for heating the gas.
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