An insulated air nozzle with an inlet pressure of 10 bar operates with a mass flow rate of 1.2 kg s-1. The inlet temperature is 600 K and the outlet velocity is 100 m s-1. The inlet diameter is 0.5 m and the outlet diameter is 0.05 m. Determine the inlet velocity and the outlet temperature. What is the change in enthalpy across the nozzle? Assume air is an ideal gas. [0.95 m s-1, 595.2 K, - 5 kJ kg-1 ]

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Engineering

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12 September, 06:15

An insulated air nozzle with an inlet pressure of 10 bar operates with a mass flow rate of 1.2 kg s-1. The inlet temperature is 600 K and the outlet velocity is 100 m s-1. The inlet diameter is 0.5 m and the outlet diameter is 0.05 m. Determine the inlet velocity and the outlet temperature. What is the change in enthalpy across the nozzle? Assume air is an ideal gas. [0.95 m s-1, 595.2 K, - 5 kJ kg-1 ]

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Tessa · Answer 1

Given mass flow rate = 1.2 kg/s

mass flow rate=density*A*V

Area=pi (douter^2-dinner^2) / 4

Area=0.194m^2

The velocity is given by

velocity=2.876 m/s