MAE 204 Lecture Notes - Lecture 25: Brayton Cycle, Gas Turbine, Wnet

• School: University at Buffalo
• Department: Mechanical & Aerospace Engr
• Course: MAE 204
• Professor: Salac David

Document Summary

4-1 isochoric heat removal ex: disel cycle at the beginning of the compression step of an air standard disiel cycle, the air is at 300k and. If the compressopn ratio is 18 while the cut off ratio is 2 determine all, t and p of each state, nth, mean effective pressure. assume specific heat vary with temperture. T1 = 300k r = v1/v2 = 18 rc = v1/v2 = 2 aire standard with exact analysis stationary. 1 -2 isentropic compression ideal gas and exact analysis. V2/v1 = vr2/vr1 at 300k vr1 = 621. 2 = vr2= 34. 51 at vr2 =34. 51 t2 = 898. 3k method 1 : p2/p1 = pr2/pr1 method 2 : ideal gass so pv = rt. P2v2/t2 = r = p3v3/t3 => t3 = t2 v3/v2. V4/v3 = v1/v3 = v1/v2 v2/v3 = r(1/rc) Vr4 = vr3 v4/v3 = vr3r/rc = 3. 47(18. 2) = 35. 73.