Question
1. (FE Exam example) Natural gas (methane) enters a converging-diverging nozzle at 70 m/s, 227 °C, and 350 kPa, and it leaves the nozzle at a supersonic velocity.The throat diameter is 2.54 cm (1"). For natural gas R= 518.3 Pa.m³/kg.K; k= 1.31.Determine the velocity of helium at the throat and the mass flow rate. (Hin
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