Last week

1
Last week

• Last week took 3 profiles, 2 at point P18 and 1
  at P16 (1 upstream of P18).
• Profiles taken at P 18 seems to be repeatable,
  for mean velocities the curves collapse while for
  the stresses there was a little scatter.
• Had to shift the y-coordinates of the second
  profile to collapse with the first by 44 microns.
• Todd was suggesting that we do histogram clipping
  to get rid of any noise.
• For P16, the mean U velocity was significantly
  different than at P18, while the V and W
  components were almost the same.
• For the Reynolds stresses and Triple products,
  they have the same trends and the magnitudes
  differ slightly.
• Probably we are going to have some difficulty
  evaluating the gradients using five clustered
  profiles, since we need to go more than 1 in the
  x direction. Things might be different in the z
  direction.

2
LDV Measurement Locations
x
P8
P23
P18
z
P28
6.2
3
P38
U?
3.8
0.1
Tunnel centerline
P3
P13
P33
X13 11
P43
X14 7
X14 11
3
Mean Velocities
4
Stresses
5
Stresses
6
Stresses
7
Triple Products
8
Triple Products
9
Triple Products
10
Triple Products
11
Triple Products
12
Mean Velocities
13
Mean Velocities
14
Stresses
15
Stresses
16
Triple Products
17
Triple Products
18
Triple Products
19
Triple Products
20
Triple Products