Consider a constant-area mixer, as shown. The mass
flow ratio between the cold and hot streams is 3, i.e., mฬ 15
mฬ 5
= 3.
The gas properties are: cp15 = 1,004 J/kg โ
K, ๐พ15 = 1.4 cp5 =
1,156 J/kg โ
K and ๐พ5 = 1.33. The flow conditions in the inlet
to the mixer are:
pt5 = pt15 = 150 kPa, Tt15 = 500 K and Tt5 = 880 K.
Assuming the hot gas Mach number is M5 = 0.4,
calculate
(a) gas properties at the mixed exit, cp6M and ๐พ6M
(b) Mach number of the cold stream, M15
(c) area ratio, A15/A5
(d) total temperature at the mixed exit, Tt6M in K