Air enters an insulated diffuser operating at steady state with a pressure of 105 N/m2 and a temperature of 57 degrees celsius. At the exit,the pressure is 1.13 x105 N/m2 , the temperature is 67 degrees celsius, and the velocity is 140 m/s. Potential energy effects can be neglected. Assuming ideal gas model with R=287 J/kg.K
A) Reduce the generalized expressions of the mass rate and energy rate balances to forms that apply for this problem, and then calculate the inlet velocity.