哈尔滨商业大学学报(自然科学版)
哈爾濱商業大學學報(自然科學版)
합이빈상업대학학보(자연과학판)
Journal of Harbin University of Commerce (Natural Sciences Edition)
2015年
5期
609-613
,共5页
金大桥%贾林利%王金玲%耿瑞光%王聪
金大橋%賈林利%王金玲%耿瑞光%王聰
금대교%가림리%왕금령%경서광%왕총
水下航行体%超空泡减阻%空泡形态%阻力特性%数值模拟
水下航行體%超空泡減阻%空泡形態%阻力特性%數值模擬
수하항행체%초공포감조%공포형태%조력특성%수치모의
underwater vehicle%drag reduction of supercavity%cavity shape%drag character-istic%numerical simulation
利用Fluent6.3对水下航行体超空泡减阻进行了数值模拟,研究了水下航行体空泡形态和阻力系数的变化规律,分析了航行体的受力和减阻特性.结果表明,水下航行体在超空泡绕流时,压差阻力系数减小,摩擦阻力系数减小并趋于零,总阻力系数比无空泡绕流时大幅度降低,比流线型模型的也小;航行体的头部在超空泡绕流时承受了绝大部分阻力,尾段所受阻力减小至几乎为零;头部空化器直径增大,超空泡较易形成,但减阻能力降低,空化器直径过小,不能形成超空泡,不能有效减阻.
利用Fluent6.3對水下航行體超空泡減阻進行瞭數值模擬,研究瞭水下航行體空泡形態和阻力繫數的變化規律,分析瞭航行體的受力和減阻特性.結果錶明,水下航行體在超空泡繞流時,壓差阻力繫數減小,摩抆阻力繫數減小併趨于零,總阻力繫數比無空泡繞流時大幅度降低,比流線型模型的也小;航行體的頭部在超空泡繞流時承受瞭絕大部分阻力,尾段所受阻力減小至幾乎為零;頭部空化器直徑增大,超空泡較易形成,但減阻能力降低,空化器直徑過小,不能形成超空泡,不能有效減阻.
이용Fluent6.3대수하항행체초공포감조진행료수치모의,연구료수하항행체공포형태화조력계수적변화규률,분석료항행체적수력화감조특성.결과표명,수하항행체재초공포요류시,압차조력계수감소,마찰조력계수감소병추우령,총조력계수비무공포요류시대폭도강저,비류선형모형적야소;항행체적두부재초공포요류시승수료절대부분조력,미단소수조력감소지궤호위령;두부공화기직경증대,초공포교역형성,단감조능력강저,공화기직경과소,불능형성초공포,불능유효감조.
The drag reduction characteristic of the flow around underwater vehicle is simula-ted based on the homogeneous equilibrium theory by using commercial CFD Code Fluent 6.3. The drag coefficient change law , force condition and drag reduction characteristics of the ve-hicle were studied in this paper .When the supercavity forms around the vehicle , the pres-sure coefficient decreased , and the viscous drag coefficient almost decreased to zero .The to-tal drag coefficient decreases greatly compared with non -cavitating flow around vehicle and the streamlined ones .The head of vehicle bears almost all of the drag , and the drag beard by the latter of vehicle decreased almost to zero .The supercavitation forms easily as the cavita-tor diameter increased , but the drag reduction ability of supercavitation decreased .When the cavitator diameter was too small , the supercavitation can ’ t form, and the drag reduction characteristic of supercavitation was ineffective .