1. Name: Zia Mohi-U-Din
Roll NO: 15103122-016
Smester:4th
Problem#018
Subject: Assignment
University Of Gujarat (Hafiz Hayaat Campus)
2.
3. Problem# 3.18
Air at 6.9 bar.260 is threshold to 5.5bar
before expanding through a nozzle to a
pressure of 1.1 bar. Assuming that air
flows reversibly in steady flow through the
nozzle, and that no heat is rejected ,
calculate the velocity of the air at exit
from the nozzle when the inlet velocity is
100m/s.
4. Solution# 3.18
AS we know that for a perfect gas, h=CpT ,
hence for a throttling process.
T2 = T1 = 533K
then,
T3 = 533×(1.1/5.5)0.4/1.4
= 366.5K
5. Solution# 3.18
For Flow through the nozzle.
Cp T2 +(C2)²/2 =Cp T3+(C3)²/2
(C3)²= 2 × 1.005 × 10³ × (533-336.5)+(100)²
=423 × 10³
i.e. Exit velocity = 636 m/s
