Seite - 1386 - in Book of Full Papers - Symposium Hydro Engineering

11. PERFORMANCE PARAMETERS The performance of ejector is generally considered to be a function of the parameters of hydraulic performance defined in the following: Internal efficiency parameters Speed ratio: η∗V,WIRK= vWIRK vVER [14] Striking drop ratio: η∗Z,WIRK= z zBR [15] Head increase ratio: η∗FH,N= z FHN,Z [16] Net head ratio: η∗= FHN,Z FHN,B [17] Outside total efficiency Flow ratio: M= QT QE [18] Head ratio: N= z HN,z [19] Efficiency – partial: ηEJ =M∙N= QT ∙z QE ∙HN,z [20] 𝜂 𝐸 𝐽 gives the ratio of total energy increase of suction flow to the total energy increase of ejector flow. Efficiency – total: ηhyd,total=ηT ∙ηG ∙ηGB ∙ (1+ηEJ) [21] Fig. 29 The diagram shows the different efficiency parameters [3] 1386