Zbornik radova Koridor 10 - Kirilo Savić

3rd International Scientific and Professional Conference
CORRIDOR 10 - a sustainable way of integrations
b) c)
Figure 2: Model with holes for measuring pressure distribution a), coordinate system, position of
measuring sections and measuring points on the train model b), c) shape of the holes for measuring
pressure distribution
2.2 Testing procedure
Measurement of the pressure distribution on the train model has been done by two
scanivalves, located within the train body. The differential pressure gauges are located within them (of
Druck type), for measuring the pressure difference from active and reference side. The static pressure
from Pitot tube, fitted on the platform, was a reference pressure. Static pressure from model surface
holes is applied to the active side. Scanivalve is connected with the holes on the model using plastic
pneumatic tubes [8, 9, 10].
Testing has been made for speeds of 30, 50 and 70 m/s, for angles of slip β = -10 0 up to 10 0
with decrement of Δβ = 2 0 .
2.3. Measuring results of train model pressure distribution
Figure 3 gives the pressure distribution around front locomotive section within the horizontal
plane on the largest locomotive width. Non-dimensional pressure coefficient Cp is directly
proportionate to pressure deference p – p 0 [6]:
C p
p
p
1 2 v
0
2
0
(1)
Figure 3. Pressure distribution around front locomotive section within the horizontal plane
on the largest locomotive width
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