The nozzle and wind tunnel device null for the wind tunnel

摘要

PROBLEM TO BE SOLVED: To provide a nozzle for a tunnel and a tunnel device capable of accurately measuring the aerodynamic performance of a test piece.;SOLUTION: This device comprises a restricted portion 35 for making air inflow contract and an expanded portion 37 for making the contracted air flow flow out toward the test piece, and the expansion angle of a wall surface 39 at the expanded portion 37 is an angle such that the flow out flow does not break away from the wall surface 39.;COPYRIGHT: (C)2008,JPO&INPIT