This page contains data measured using ultrasonic anemometers during the following Southbound train runs:
| Train Run Number | Speed (km/h) | Data File |
|---|---|---|
| 35334 | 157.5 | 35334-s02.dat |
| 35338 | 163.5 | 35338-s05.dat |
| 35340 | 202.0 | 35340-s07.dat |
| 35352 | 202.0 | 35352-s12.dat |
| 35358 | 198 | 35358-s14.dat |
| 35362 | 197.5 | 35362-s17.dat |
The data files can be viewed in a text editor and can be downloaded from http://www.thermotun.com/airshaft/ultrasonic/ultrasonic-southbound-dat.zip
The following example graphs have been produced from data file 35334-s02.dat
|
The measurement enclosure on top of the airshaft was divided into 8 compartments (see photographs of the airshaft). The layout of the graphs represents the distribution of 6 ultrasonic anemometers in the airshaft as viewed from above. Each ultrasonic sensor measured flow data in 3 directions. Each direction is shown in a different set of graphs below. The speed of sound was estimated by the ultrasonic sensors and is included in a further set of graphs. |
 Diagram of airshaft from above showing orientation of ultrasonic sensors. |
u direction: vertical airflow component (+ve = up the shaft)
v direction: lateral airflow component (+ve = right to left in the top boxes, left to tight in the bottom boxes)
w direction: longitudinal airflow component (+ve = inwards from shaft wall)
c: speed of sound (approx)
u direction: Comparison between two sets of three ultrasonic sensors.
