Question

Question 11.5 The primitive parameters at the average radius of the first stage of a subsonic axial compressor are: u=u2=250m/s, Cix-C2-C3x =125m/s, Clu=30m/s, Czu=0, Lu= 20.1kj /kg, (1) Calculate Maiw(T 1=288K), Mazx, B1, B2 and a2 (2) Draw the velocity triangle at the primitive level. (3) Draw a diagram of the rotating blade and the static blade cascade consistent with this velocity triangle, and point out the geometric characteristics of the cascade passage. (Please provide step by step solution with details)

Answer 1

# Selection – Anid flows Compressor Given data : Tangential/ blade te spel 4,24 = Rsorole Constant to wolnity Gr + Son = Gaz 1250/ whirl velocity at flet 7 BladeGu = 30m/ Gu á < tired van 1 Gulee vaue] Work done Le = 20.1 kilky * Inlet vleesky trougle > [Moving blade] u kGo > ku So Outlet velocity triangle (moving black) Ta Vor V2 >10 Cay

from inlet velocity foongle - 125° + (850 -30) V;, = 253.63 16 ms] a = FORT 8=104 R=0.287 kollak 7=288k 9, = LUXO.287%26BX03 = 340.1740ms 253.0316 Maw = 340.1740 Maw = 0.7438 from triangle - - G-G4 tex 250-30 125 AB. = 60.395507

20.1X10 As we know that for compressor. Woskalowe = (Nov - Vo.) u, Billig 20.1X103 = (Can - Ciugu, L "? Gu = 30ms 4, = 250 ms az 1.4 m/s sowo by calling suutlet website foloogle. tom az egyet < = 110.4 * = 674509 125 -4, tanß = २५ G 250 -110,4 T25 To = 48.158227 V = 1 Can t (42 - Cay)

af test (2012Hanya Kors = 187.3850m) As we know for an ideal gas Euthalpy to fenction of absolute Temp only h h = CAT h. h = 44 = 20.1 kolleg 20.1 = 1.005 OT LAT = 20°092] To=288+20 . = 308k Mraw = Voz 4 toz VERT 187.3850 17.480.287X10X308 How = 0.5325

moving blade Fixeel blade ادیں کما احسبهم الا ( ۱ ۱ . ا ا ز | | | | | ۰۰۰