Practical seminar venturi orifice

96d482a8-6a38-414c-9229-7f553bb1e410 14 Practical seminar venturi orifice Philipp Marx HTW Dresden 4 5 false false 0 decimal

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

\[TITLE]\

1. Venturi meter (after Bernoulli)

Geometry values venturi

Measured values

d.1 31.75 mm * :

h.1 40033828024441 mat mm * :

h.2 277.5 24023823141 mat mm * :

h.3 34730426223741 mat mm * :

d.2 15 mm * :

d.3 31.75 mm * :

f π 4 / d.2 2^d.1 4^d.2 4^- (sqrt / * :

Q.control 201510541 mat L min / * :

f 0.1798

Flow coefficient

φ 0.98 :

Measured head difference

Δh.p h.1 h.2 - :

Δh.p 0.1225 m * 0.098 m * 0.042 m * 0.013 m * 41 mat

data Δh.p :

Determine matrix rows

k 1 Δh.p rows range :

Δh Q φ f * d.1 2^* 2 g.e * Δh * sqrt * :

Flow formula

Apply matrix in Q formula

Q k 1 el data k 1 el Q :

Result calculated Q

Q k 1 el L min / 16.5 14.8 9.7 5.4 41 mat

Q.control L min / 201510541 mat

Hydraulic losses

A.1 d.1 2^4 / π * :

Area

v.1 Q.control A.1 / :

Velocity at point 1

Losses in engery

h.losses h.1 h.3 - :

v.1 0.421 m s / * 0.3158 m s / * 0.2105 m s / * 0.1053 m s / * 41 mat

h.losses 0.053 m * 0.034 m * 0.018 m * 0.007 m * 41 mat

ζ h.losses v.1 2^2 g.e * / / :

ζ 3.1277 2.0064 1.0622 0.4131 41 mat

2. Orifice (after Bernoulli)