EXPERIMENTAL INVESTIGATION OF THREE-DIMENSIONAL TURBULENT JETS ISSUING FROM A NOZZLE WITH A RECTANGULAR OUTPUT SECTION

摘要

A detailed analysis of average dynamic characteristics of flow in a nozzle with a rectangular output section in relation to the nozzle aspect ratio parameter and Reynolds number has been carried out and its results have been generalized. It has been established that the flow velocity profile on the jet axis in the nozzle is determined by the parameter of its aspect ratio and by the jet initial velocity. A semiempirical formula that describes well the change in the maximum flow velocity in the main section of a three-dimensional jet is suggested.