摘要: Fluids flowing over an unheated cylinder with its axis normal to the flow separate in their wake into a central stream total enthalpy lower than one upstream and two outer streams higher enthalpies provided Reynolds number is such that alternate separation of vortices formation Karman vortex street occur. Evidence this was observed 1940 by low values recovery temperature on downstream side high velocity air stream. A experimental studies various investigators confirmed energy separation, established it connected unsteady character formation, enhanced presence sound waves. Various explanations have been proposed for mechanisms which lead separation. The present paper surveys significant findings attempts describe effect physical terms starting equation drawing recent computer solutions.
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