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时间:2020-04-24
《基于潜艇模型尾流湍流强度和耗散率的CFD模拟-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第9卷第3期中国舰船研究VoI.9NO.32014年6月ChineseJournalofShipResearchJun.2014doi:10.3969~.issn.1673—3185.2014.03.006期刊网址:WWW.ship—research.com网络出版地址:http://www.cnki.net/kcms/doi/10.3969~.issn.1673-3185.2014.03.006.html基于潜艇模型尾流湍流强度和耗散率的CFD模拟赵鹏伟,卢晓平,孙玉明海军工程大学舰船工程系,湖北武汉430033摘要:优良的隐身性能使得潜艇具有强大的突防能力,因此
2、,控制潜艇尾流信号特征对于提高潜艇隐身性能意义重大,这些信号特征主要包括尾部湍流强度、湍动能、湍流耗散率等。同时,优良的艇型对于抑制尾流信号特征、提高潜艇快速性和隐身性也具有重要意义。基于此,采用RANS方法计算SUBOFF潜艇主艇体艇型及6种改良艇型的艇体粘性绕流,将CFD方法用于分析艇体半径、艇艏长度、艇艉长度等参数对潜艇尾流信号特征的影响。计算结果显示:在SUBOFF潜艇主艇体艇型及其6种改良艇型的尾流场中,增加艇体半径有利于抑制远尾流场湍流信号特征,在近场则不利;增加艇艏长度能降低近尾流场湍流信号特征,在远场影响较小;增加艇艉长度在近、远尾流场均有利于降低其
3、信号特征。关键词:潜艇流场;RANS方法;尾流场信号特征;SUBOFF潜艇主艇体中图分类号:U661.1文献标志码:A文章编号:1673—3185(2014)03—43—06CFDSimulationoftheWakeTurbulenceIntensityandtheDissipationRatingofaSubmarineModelZHAOPengwei,LUXiaoping,SUNYumingDepartmentofNavalArchitectureEngineering,NavalUniversityofEngineering,Wuhan430033,Chin
4、aAbstract:Superiorstealthinessmakessubmarineshavestrongpenetrationcapability,SOitissignificanttocontrolwakesingaturesforimprovingthesteahhinessofsubmarines.Submarinewakesingaturesincludetheturbulenceintensity,turbulentkineticenergy,andturbulencedissipationrate.Meanwhile,asatisfacto-ryh
5、ullformcanalsorestrainthewakesingaturesofsubmarinesandcangreatlyimproveitsspeedabilityandstealthinesscapability.Inthispaper,theviscousflowfieldsaroundSUBOFFandsiximprovedsubma—rinehullform$arecalculatedbyusingCFDtechnicRANSmethods,basedonwhichtheeffectsofhullradi—US,bowhulllength,andst
6、ernhulllengthonthesubmarinewakesignaturesareanalyzed.TheresultsshowthatinthewakeoftheoriginalSUBOFFhullformandthatofthemodifiedhullforms,theincreasinghullradiusreducestheturbulencesingaturesfarfieldastern,butaugmentstheturbulencesingaturesclosetothehullstern;meanwhile,theincreasingbowh
7、ulllengthreducesthewaketurbulencesingaturesclosetothehullstern,buthaslittleeffectontheturbulencesingaturesfarfieldastern;plus,theincreasingsternhul1lengthcanalleviatethewaketurbulencesingaturessignificantly.Keywords:submarineflowfield;RANSmethods;wakesingatures;SUBOFFsubmarineo引言:慧优良
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