Question

urbine has a total pressu four stages. The inlet total temperature is TO = 1200K and the total-to-total efficiency of each stage is 0.87. Evaluate the overall total-to-total efficiency of the turbine if steam is flowing through it. Steam can be assumed to behave as a perfect gas with γ = 1.3. Why is the overall efficiency higher than the stage efficiency? Given: The properties of air are =2.5 T01 = 1200K nt = 0.87 PoL

I thought I had to use T01/t1= (P01/1)^(k-1/k)...but doesn't seem like it...The stagnation temperature needs to be 581k...I just need to know how to find this temperature to later plug into efficiency.

Answer 1

Pressure ratio 2. ak each sge hoof stages nr 4 sSue as shoion in Por t;に 1200 K 0オ 0 2 22. atioiven s.5 PoA 2.5 fos 8ut, as we know tarbine s use to expand the ges pressure, thek is

Psveat the exit s ane turbine sheula be 'less than İkTef pressure Thek įkettou PMust be less er ence turbine shoul 0.2 Po 01 3.5 ench sag as -$ciency ok an。チ turbine can be torte as het- hoa ご01-702 the tbie tohen gus is epnd Tor 02 102 Te l

his is a equution to lla te the exit achul cuatotal teape raire d each shg ("To 2)= 12D0 , 3-1 {一0.87--@4) 1.3 デ onsedemy second stage. of second stge for hiyd shy 5696 SX o. 334/ This is e bolet emperatare at the RS

att the krbines To To Tor Po( Ter- Tos 1200- 53 2.00-5 40