nozzle exit
2.Abstract: Optimum distances between primary nozzle exit and mixing tube inlet,static pressure recovery of the mixing flow in mixing tube、total pressure distributions at the exit of mixing tube、pumping coefficients and total pressure losses of the exhaust ejector systems with four different types of primary nozzles have been measured in the experiments.
7.It is shown that with the decrease in size of particles, their velocity at the exit of Laval nozzle increases under the conditions of both the invariable gas parameters and the same Laval nozzle length; the Laval nozzle length increases with the size of particles under the same speeding rate of particles.

