超空泡航行体前部线形对空泡生成临界通气量影响的实验研究  

Experimental Investigation to Effects of Fore-body Profile on Critical Gas Rate for Vehicle Ventilated Supercavitation

作　　者：张博[1] 张宇文[1] 阚雷[1] 范辉[1] 裴譞[1] 

机构地区：[1]西北工业大学,西安710072

出　　处：《应用力学学报》2008年第4期562-565,共4页Chinese Journal of Applied Mechanics

摘　　要：基于航行体超空泡理论和格兰威尔线形设计方法,设计了三种具有不同前部线形的航行体模型。并针对所设计的三种模型和具有锥形前部外型的航行体模型在水洞中进行了生成超空泡临界通气量的实验研究。结果表明:航行体前部线型对超空泡临界通气量的影响程度与航行体的轴向斜率分布有关,模型表面斜率轴向分布曲线越平坦或变化率越小,越有利于减少超空泡生成所需的临界通气量。实验数据显示设计的三种格兰威尔前部线型航行体与锥形前部外型航行体相比,生成超空泡临界通气量都有明显减小,最大减小量达24%,为降低超高速航行体超空泡生成所需的临界通气量提供了一条技术途径和研究方法。Three types of supercavitating vehicles with different front shapes/profiles are designed based on the cavity theory and Granville streamlined equation. Critical gas flow rate for supercavitation generation experiments are carried out in the NWPU high speed water tunnel for the three types of vehicles and a vehicle with cone-shaped front part named mod-Ⅰ. The experiments indicate that the extent of the influence of the vehicle front part profile on the critical volumetric gas flow rate required for supercavitation generation is affected by the axial distribution of the front part gradient. For a smaller gradient, the critical volumetric gas flow rate becomes less. Critical gas flow rate required for the three type of mode designed by the author is less than the mod-Ⅰ, the maximal decreases is up to 24%. The experiments provide an effective strategy to reduce the critical ventilation rate required for supercavitation generation of the supercavitating vehicles.

关 键 词：超空泡航行体 通气空化 临界通气量 前部线型 斜率 

分 类 号：O352[理学—流体力学]