简介:摘要:法兰泄漏校核是工程设计中比较复杂的课题,为研究不同的法兰泄漏校核方法及适用范围,本文以标准法兰的温度-压力额定值为基准,利用CAESRA II 应力分析计算软件,模拟出不同工况下各校核方法的泄漏界限,并根据各种校核方法的原理,推荐不同法兰泄漏校核方法的适用范围和场景。
简介:摘要:法兰连接是高压球阀的关键密封部位,其可靠性直接影响着整个阀门的使用性能。在实际运行中,高压球阀法兰泄漏问题时有发生,不仅影响设备正常运转,还可能导致安全隐患。造成法兰泄漏的原因较为复杂,需要从密封面加工质量、连接操作规范性、介质条件变化等多个方面进行分析。对症下药,采取提高加工精度、优化连接工艺、改善密封材料等综合措施,有望从根本上解决高压球阀法兰泄漏问题。
简介:WhenstudyingCaesar'stwoBritishcampaigns,onediscoversmanydifferences:thetimeoftheyear,sizeofthearmy,preparation,transport,informationofgeographyandtribes,aswellascausesandresults.Caesar'sfirstinvasionisquitedifferentfromthesecondoneandmayberegardedasanoverturefortherealcampaign.ItappearsthatCaesarlearnedfrommistakesmadein55BCandtooksomestepstocorrecttheminthenextyear.ItcanalsobedemonstratedthatbothGaiusandClaudiusunderstood...
简介:Someofthemathematicalpropertiesoftheinterfacebetweentwoincompressibleinviscidandimmisciblefluidswithdifferentdensitiesundertheinfluenceofaconstantgravityfieldgareinvestigated.ThepurposeofthispaperistoprovethatlinearlyunstablemodesforRayleigh-Taylorinstabilitiesgivebirthtononlinearinstabilitiesforthefullnonlinearsystem.Themainingredientisageneralinstabilitytheoreminananalyticframeworkwhichenablesustogofromlineartononlinearinstabilities.