简介:她轻轻地走进来,像一个探究陌生地域的儿童,眼神里满是怯懦和惊吓。她是不希望引起人注意的,至少不是很多人的注意,在她还没完全踏进门时,已有接待小姐迎了上来,一脸的盈盈笑意,语意温软,姐,剪发还是烫发?确实没几个人注意,来到这里的,都是头上那些事儿,头都让'大师们'操纵着,除了往镜子里瞄一下,谁有心
简介:在不断要求生活质量的今天,什么才是生活的质量?实现自我的追求?还是跟随社会潮流而沉浮?当互联网从最初的IPV4过渡到今天的已经在北京、成都、上海开始城市区域试点的IPV6,风格的速度将提高1000至10000倍!下载一部DVD的时间将变成只有内个“滴答”的秒钟就可以计算。这一切,是生活的质量吗?
简介:NASArotor37wasusedasablindtestcaseforturbomachineryCFDbytheTurbomachineryCommitteeoftheIGTI.Therotorisatransoniccompressorwithatipspeedof454m/s(1500ft/s)andarelativelyhighpressureratioof2.1.Itwastestedinisolationwithacircumferentiallyuniforminletflowsothattheflowthroughitshouldbesteadyapartfromandeffectsofpassagetopassagegeometryvariationandmechanicalvibration.Assuchitrepresentsthesimplestpossibletypeoftestforthree-dimensionalturbomachineryflowsolvers.Howerver,therotorstillpresentsarealchallengeto3Dviscousflowsolversbecausetheshockwave-boudarylayerinteractionisstrongandtheeffectsofviscosityaredominantindeterminingtheflowdeviationandhencethepressureration.Elevenblindsolutionsweresubmittewdandinadditionanon-blindsolutionwasusedtopreparefortheexercies.ThispaperreviewstheflowinthetestcaseandthecomparisonsoftheCFDsolutionswiththetestdata.LessonsforboththeFlowphysicsintransonicfansandfortheapplicationofCFDtosuchmachinesarepointedout.