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For a conical nozzle of throat diameter 0.007 m, exit cross-section diameter 0.02 m, and divergent section length of 0.038 m, determine the nozzle semi-divergence angle.

For a conical nozzle of throat diameter 0.007 m, exit cross-section diameter 0.02 m, and divergent section length of 0.038 m, determine the nozzle semi-divergence angle. Correct Answer 9.7°

Required angle α = tan-1((re-rt)/L), where rt is the throat radius and re is the exit cross-section radius. ∴ α = tan-1(1/2(0.02-0.007)/0.038) = 9.7°.

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