Project Presentation

Pagina 1

Titolo presentazione sottotitolo Milano, XX mese 20XX SINGLE STAGE AXIAL COMPRESSOR DESIGN Course of Turbomachinery A Prof. Gaetani Requirements 1 1) The velocity triangles along the blade span (in 3 radial positions) 2) The blades’ shape 3) The losses (free choice for the correlation and parameters) 4) The overall blade row and stage efficiency 5) The compression ratio when a mass flow of 90 kg/s is delivered and the best IGV position Preliminar step - Similarity theory 2 Data: • m = 100 kg s • TT0 = 300 K • PT0 = 1 bar • βTT = 1,45 • Dtip ≤ 1 m • ρT0= PT0 R∗TT0 = 1,16 kg m3 • Q0 = m ρT0 = 86,1 m3 𝑠 • ∆hTT,is= cp ∗ TT0 (βTT γ−1 γ − 1) = 33,75 kJ kg Vavra-Balje preliminar optimization 3 T .B.N. All variables are imposed positive Independent Variables ω [rad/s] D1tip [m] λ ( D1hub D1tip ) V0ax[m/s] Constraints: • 0.9 ≤ D1tip ≤ 1 • 0.3 ≤ ϕ0 ≤ 1 • 3.5 ≤ ωs ≤ 10 • 0.4 ≤ λ ≤ 0.8 • 𝑀0 ≤ 1 • m = 100 kg s Objective function Minimum M0 Vavra-Balje optimization - Results 4 • M0=0,54 • D1tip= 1 m • λ = 0,55 • V0ax= 180,64 m/s • ω = 1202 rad/s (n≃11500 rpm) • ωs = ω Q0 ∆hTT,is 0,75 = 4,48 • ϕ0= V0ax Umid = 0,39 • b0 = 225mm • Ds = D1tip ∆hTT,is 0,25 Q0 = 1,46