Experimental investigation of rarefied flows through supersonic nozzles

In this paper, we report experimental investigation to improve the shape of a supersonic nozzle for rarefied flows high axial density at extended distances from nozzle. The reported work is significant molecular jet/beam applications that require center-line and narrow jet profile. We investigate parabolic whose profile generated using virtual source model free expansion compare its performance with set conical nozzles having different cone angles simulations as well experiments. Axial lateral spread jets are measured pitot tube assembly. accuracy operational limit flow quantified by established mathematical empirical models sonic study demonstrates comparable or slightly better compared counterparts. Moreover, can be used optimizing opening angle various lengths.