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Title: Discharge Characteristics Of Small Sonic Nozzles In The Shape Of Pyramidal Convergent And Conical Divergent
Author: Chih-Chung HU1, Win-Ti LIN2, Chun-Min SU3, Wen-Jay LIU4
Source: Flomeko 2010
Year Published: 2010
Abstract: This study cooperated the KOH anisotropic etching with the laser machining to fabricate small sonic nozzles in the shape of a pyramidal convergent inlet followed by a conical diffuser with a divergent angle of 5o. Three different diffuser lengths were made for the nozzles. The throat diameters were around 100 m. Experiments were performed to obtain discharge coefficients and critical back pressure ratios in Reynolds numbers ranging from 5.8102 to 4.5103. The critical back pressure ratio for one of the nozzle type examined reached 0.486 at Re 4.4103.

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