4f884912-5d3e-4115-a03c-affb513e1e2b 9 6 12 decimal

&[DATE] &[TIME] - &[FILENAME] - [SPEC]

Consultant: SPEC Owner: jmGiraud

Project: Venturi-ejector [1/1] Client: N/A [for approval]

Date: 20018_08_10 Rev: 0 [pre-design]

Description . . .

This project is typical of caracterising a throat-ejector of adjustable profile.

It is represented by three parameters, thus reproducible at will for lab testing.

The proposal is unsourced from other feasibilty study Consultant.

The profile is in fact a two paramaters mathematical formulation.

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Venturi shape from "Orphan" Polygamma size 10 : shift 0.5 : X 2 : 13 mat n z Ψ 1 - (n 1 +^n! (* 1 z k + (shift + / (k 0 size sum * : x c 10 x ≤ (x 2 ≤ (& cases : 31 line

Venturi nozzle of prescribed design

0 x Ψ x c * 1 x Ψ x c * X 5 X 5 - 2 2 mat 3 1 sys

datum 'Y' 00 Ψ 10 Ψ 21 sys 4.3617 - 4.3617 21 sys

datum 'throat' 0 X Ψ 1 X Ψ 21 sys 1.8620 - 1.8620 21 sys

Ø 21 X Ψ * : 3.724

A yo xo α β x f 1 - yo + A 1 x xo - α / - exp - (* x xo - β / - exp * + (- :

A 1 : yo 0 : xo 0 : α 0.5 : β 1 : 15 mat

X A yo xo α β x f x diff x 01 solve : 0.549

x φ 1 x 0 ≤ A yo xo α β x f 0 x ≤ cases :

upstreamP1 1 - 0.5 P1 13 mat : dnstreamP2 0.625 0.125 <= P2 throat 13 mat : 21 sys

Vena contracta, imitate pressure recovery

x φ - 0.5 + x φ 0.5 - X 0.25 X 0.25 - 2 2 mat upstreamP1 dnstreamP2 5 1 sys