气泡减阻实验研究

为研究气泡对航行体侧壁的减阻效果，设计一套试验装置。利用该装置，采用壁面通气法研究不同通气量、不同来流速度和不同通气角度对气泡减阻效果的影响。实验结果表明：在通气量和通气角度不变的条件下，减阻率随来流速度增加而增加；在来流速度和通气角度不变的条件下，随通气量增加，减阻率先增加然后变小；在来流速度和通气量不变的条件下，减阻率随通气角度的增大而减少；在一定的条件下，取得了20．34％的减阻率。

Experimental Study on Drag Reduction with Air Bubble

In order to research the effect of drag reduction of the air bubble on the hull sidewall, a set of testing apparatus was designed. By this apparatus, the effects of air bubble drag reduction with different air flow, dissimilar incoming flow velocity and different ventilating angle were researched by gas injection on the wall. Test results showed that as the air flow and ventilating angle are invariable, along with the incoming flow velocity increasing, the efficiency of drag reduction increases; as the incoming flow velocity and ventilating angle are invariable, along with the air flow increasing, the efficiency of drag reduction diminishes after increasing; as the incoming flow velocity and air flow are invariahle, along with the ventilating angle increasing, the efficiency of drag reduction diminishes. Under given conditions, about 20. 34% the efficiency of drag reduction could be obtained.