Modélisation de l'écoulement diphasique dans les injecteurs Diesel

Symbol Unit ValueNozzle diameter D 0 µm 120-180Nozzle length L 0 mm 1Liquid density ρ l k g /m 3 850Injection pressure P inj M P a 100Chamber pressure P ch M P a 5Exit velocity V ch m/s 300-400Injection duration T inj ms 2-3G asoil flowrate per injection ṁ inj mg /ms 23Advection duration in the nozzle T a µs 4-5Vapor pressure P sat P a 300Surface tension σ N/m 0.028Reynolds number Re = ρV chD 0µ l- ∼ 15000Liquid viscosity µ l N.s/m 2 2.676E − 03Table 1: Characteristic values in Diesel injectors (1bar, 300K) [35] [11]Equation of stateAuthorsDρDt = C 0(P − P v ) Chen and Heister [55]P (P + P c )ρ =Ikohagi et al. [62]⎧K(1 − Y )P (T + T 0 ) + Y R(P + P c )T⎪⎨ ρ l , if P > P v + ∆Pρ = ρ v , if P