 two-dimension jet mix compress fluid two-dimension jet mix compress fluid mix diverg superson jet exhaust superson stream investig theoret paper flow assum laminar veloc temperatur jet surround stream method small perturb ordinari boundari layer assumpt equat motion two-dimension flow reduc form well-known equat heat conduct solut boundari condit exact solut dimension jet mix viscou compress fluid success approxim start solut small perturb veloc temperatur distribut case--on mix two-uniform flow mix jet compress fluid two-dimension nozzl full expans exhaust superson stream--have calcul properti jet mix depend momentum jet chang momentum chang veloc chang temperatur--i chang densiti compress consider properti jet second case turbul flow investig reichardt's theori free turbul turbul shear stress express paper constant determin experiment li 0 1 exact depend condit mix express turbul shear stress viscou stress equat motion suitabl transform variabl equat two-dimension turbul jet mix ident laminar case solut paper appli turbul case provid characterist constant properli chosen 