- Thegreatertheroughnesselements,themorevisibletheoscillationofvelocity,evenvortexesoccur,whichincreasesthepressureloss;Theresultsshowthatthereareacoupleofvortexestrendingblendalongtheaxesinthecylinderattheinitialphaseofintakeprocess.Notso,claimothers,...
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